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Author SHA1 Message Date
Jakub Kicinski
fde9836c40 bluetooth pull request for net:
- btusb: Always allow SCO packets for user channel
  - L2CAP: Fix L2CAP_ECRED_CONN_RSP response
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Merge tag 'for-net-2025-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth

Luiz Augusto von Dentz says:

====================
bluetooth pull request for net:

 - btusb: Always allow SCO packets for user channel
 - L2CAP: Fix L2CAP_ECRED_CONN_RSP response

* tag 'for-net-2025-02-21' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth:
  Bluetooth: L2CAP: Fix L2CAP_ECRED_CONN_RSP response
  Bluetooth: Always allow SCO packets for user channel
====================

Link: https://patch.msgid.link/20250221154941.2139043-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-21 15:56:42 -08:00
Jakub Kicinski
b282c54823 Merge branch 'rxrpc-afs-miscellaneous-fixes'
David Howells says:

====================
rxrpc, afs: Miscellaneous fixes

Here are some miscellaneous fixes for rxrpc and afs:

 (1) In the rxperf test server, make it correctly receive and decode the
     terminal magic cookie.

 (2) In rxrpc, get rid of the peer->mtu_lock as it is not only redundant,
     it now causes a lockdep complaint.

 (3) In rxrpc, fix a lockdep-detected instance where a spinlock is being
     bh-locked whilst irqs are disabled.

 (4) In afs, fix the ref of a server displaced from an afs_server_list
     struct.

 (5) In afs, make afs_server records belonging to a cell take refs on the
     afs_cell record so that the latter doesn't get deleted first when that
     cell is being destroyed.
====================

Link: https://patch.msgid.link/20250218192250.296870-1-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-21 15:06:32 -08:00
David Howells
1f0fc3374f afs: Give an afs_server object a ref on the afs_cell object it points to
Give an afs_server object a ref on the afs_cell object it points to so that
the cell doesn't get deleted before the server record.

Whilst this is circular (cell -> vol -> server_list -> server -> cell), the
ref only pins the memory, not the lifetime as that's controlled by the
activity counter.  When the volume's activity counter reaches 0, it
detaches from the cell and discards its server list; when a cell's activity
counter reaches 0, it discards its root volume.  At that point, the
circularity is cut.

Fixes: d2ddc776a4 ("afs: Overhaul volume and server record caching and fileserver rotation")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20250218192250.296870-6-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-21 15:06:29 -08:00
David Howells
add117e48d afs: Fix the server_list to unuse a displaced server rather than putting it
When allocating and building an afs_server_list struct object from a VLDB
record, we look up each server address to get the server record for it -
but a server may have more than one entry in the record and we discard the
duplicate pointers.  Currently, however, when we discard, we only put a
server record, not unuse it - but the lookup got as an active-user count.

The active-user count on an afs_server_list object determines its lifetime
whereas the refcount keeps the memory backing it around.  Failing to reduce
the active-user counter prevents the record from being cleaned up and can
lead to multiple copied being seen - and pointing to deleted afs_cell
objects and other such things.

Fix this by switching the incorrect 'put' to an 'unuse' instead.

Without this, occasionally, a dead server record can be seen in
/proc/net/afs/servers and list corruption may be observed:

    list_del corruption. prev->next should be ffff888102423e40, but was 0000000000000000. (prev=ffff88810140cd38)

Fixes: 977e5f8ed0 ("afs: Split the usage count on struct afs_server")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20250218192250.296870-5-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-21 15:06:29 -08:00
David Howells
71f5409176 rxrpc: Fix locking issues with the peer record hash
rxrpc_new_incoming_peer() can't use spin_lock_bh() whilst its caller has
interrupts disabled.

    WARNING: CPU: 0 PID: 1550 at kernel/softirq.c:369 __local_bh_enable_ip+0x46/0xd0
    ...
    Call Trace:
     rxrpc_alloc_incoming_call+0x1b0/0x400
     rxrpc_new_incoming_call+0x1dd/0x5e0
     rxrpc_input_packet+0x84a/0x920
     rxrpc_io_thread+0x40d/0xb40
     kthread+0x2ec/0x300
     ret_from_fork+0x24/0x40
     ret_from_fork_asm+0x1a/0x30
     </TASK>
    irq event stamp: 1811
    hardirqs last  enabled at (1809): _raw_spin_unlock_irq+0x24/0x50
    hardirqs last disabled at (1810): _raw_read_lock_irq+0x17/0x70
    softirqs last  enabled at (1182): handle_softirqs+0x3ee/0x430
    softirqs last disabled at (1811): rxrpc_new_incoming_peer+0x56/0x120

Fix this by using a plain spin_lock() instead.  IRQs are held, so softirqs
can't happen.

Fixes: a2ea9a9072 ("rxrpc: Use irq-disabling spinlocks between app and I/O thread")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20250218192250.296870-4-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-21 15:06:29 -08:00
David Howells
833fefa074 rxrpc: peer->mtu_lock is redundant
The peer->mtu_lock is only used to lock around writes to peer->max_data -
and nothing else; further, all such writes take place in the I/O thread and
the lock is only ever write-locked and never read-locked.

In a couple of places, the write_seqcount_begin() is wrapped in
preempt_disable/enable(), but not in all places.  This can cause lockdep to
complain:

WARNING: CPU: 0 PID: 1549 at include/linux/seqlock.h:221 rxrpc_input_ack_trailer+0x305/0x430
...
RIP: 0010:rxrpc_input_ack_trailer+0x305/0x430

Fix this by just getting rid of the lock.

Fixes: eeaedc5449 ("rxrpc: Implement path-MTU probing using padded PING ACKs (RFC8899)")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20250218192250.296870-3-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-21 15:06:29 -08:00
David Howells
c34d999ca3 rxrpc: rxperf: Fix missing decoding of terminal magic cookie
The rxperf RPCs seem to have a magic cookie at the end of the request that
was failing to be taken account of by the unmarshalling of the request.
Fix the rxperf code to expect this.

Fixes: 75bfdbf2fc ("rxrpc: Implement an in-kernel rxperf server for testing purposes")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20250218192250.296870-2-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-21 15:06:29 -08:00
Qunqin Zhao
f06e4bfd01 net: stmmac: dwmac-loongson: Add fix_soc_reset() callback
Loongson's DWMAC device may take nearly two seconds to complete DMA reset,
however, the default waiting time for reset is 200 milliseconds.
Therefore, the following error message may appear:

[14.427169] dwmac-loongson-pci 0000:00:03.2: Failed to reset the dma

Fixes: 803fc61df2 ("net: stmmac: dwmac-loongson: Add Loongson Multi-channels GMAC support")
Cc: stable@vger.kernel.org
Signed-off-by: Qunqin Zhao <zhaoqunqin@loongson.cn>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Yanteng Si <si.yanteng@linux.dev>
Link: https://patch.msgid.link/20250219020701.15139-1-zhaoqunqin@loongson.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-20 17:19:41 -08:00
George Moussalem
992ee3ed6e net: phy: qcom: qca807x fix condition for DAC_DSP_BIAS_CURRENT
While setting the DAC value, the wrong boolean value is evaluated to set
the DSP bias current. So let's correct the conditional statement and use
the right boolean value read from the DTS set in the priv.

Cc: stable@vger.kernel.org
Fixes: d1cb613efb ("net: phy: qcom: add support for QCA807x PHY Family")
Signed-off-by: George Moussalem <george.moussalem@outlook.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250219130923.7216-1-ansuelsmth@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-20 13:19:35 -08:00
Luiz Augusto von Dentz
b25120e1d5 Bluetooth: L2CAP: Fix L2CAP_ECRED_CONN_RSP response
L2CAP_ECRED_CONN_RSP needs to respond DCID in the same order received as
SCID but the order is reversed due to use of list_add which actually
prepend channels to the list so the response is reversed:

> ACL Data RX: Handle 16 flags 0x02 dlen 26
      LE L2CAP: Enhanced Credit Connection Request (0x17) ident 2 len 18
        PSM: 39 (0x0027)
        MTU: 256
        MPS: 251
        Credits: 65535
        Source CID: 116
        Source CID: 117
        Source CID: 118
        Source CID: 119
        Source CID: 120
< ACL Data TX: Handle 16 flags 0x00 dlen 26
      LE L2CAP: Enhanced Credit Connection Response (0x18) ident 2 len 18
        MTU: 517
        MPS: 247
        Credits: 3
        Result: Connection successful (0x0000)
        Destination CID: 68
        Destination CID: 67
        Destination CID: 66
        Destination CID: 65
        Destination CID: 64

Also make sure the response don't include channels that are not on
BT_CONNECT2 since the chan->ident can be set to the same value as in the
following trace:

< ACL Data TX: Handle 16 flags 0x00 dlen 12
      LE L2CAP: LE Flow Control Credit (0x16) ident 6 len 4
        Source CID: 64
        Credits: 1
...
> ACL Data RX: Handle 16 flags 0x02 dlen 18
      LE L2CAP: Enhanced Credit Connection Request (0x17) ident 6 len 10
        PSM: 39 (0x0027)
        MTU: 517
        MPS: 251
        Credits: 255
        Source CID: 70
< ACL Data TX: Handle 16 flags 0x00 dlen 20
      LE L2CAP: Enhanced Credit Connection Response (0x18) ident 6 len 12
        MTU: 517
        MPS: 247
        Credits: 3
        Result: Connection successful (0x0000)
        Destination CID: 64
        Destination CID: 68

Closes: https://github.com/bluez/bluez/issues/1094
Fixes: 9aa9d9473f ("Bluetooth: L2CAP: Fix responding with wrong PDU type")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2025-02-20 13:25:11 -05:00
Hsin-chen Chuang
bd30e8d7bf Bluetooth: Always allow SCO packets for user channel
The SCO packets from Bluetooth raw socket are now rejected because
hci_conn_num is left 0. This patch allows such the usecase to enable
the userspace SCO support.

Fixes: b16b327edb ("Bluetooth: btusb: add sysfs attribute to control USB alt setting")
Signed-off-by: Hsin-chen Chuang <chharry@chromium.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2025-02-20 13:25:08 -05:00
Linus Torvalds
27eddbf344 Smaller than usual with no fixes from any subtree.
Current release - regressions:
 
   - core: fix race of rtnl_net_lock(dev_net(dev)).
 
 Previous releases - regressions:
 
   - core: remove the single page frag cache for good
 
   - flow_dissector: fix handling of mixed port and port-range keys
 
   - sched: cls_api: fix error handling causing NULL dereference
 
   - tcp:
     - adjust rcvq_space after updating scaling ratio
     - drop secpath at the same time as we currently drop dst
 
   - eth: gtp: suppress list corruption splat in gtp_net_exit_batch_rtnl().
 
 Previous releases - always broken:
 
   - vsock:
     - fix variables initialization during resuming
     - for connectible sockets allow only connected
 
   - eth: geneve: fix use-after-free in geneve_find_dev().
 
   - eth: ibmvnic: don't reference skb after sending to VIOS
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Smaller than usual with no fixes from any subtree.

  Current release - regressions:

   - core: fix race of rtnl_net_lock(dev_net(dev))

  Previous releases - regressions:

   - core: remove the single page frag cache for good

   - flow_dissector: fix handling of mixed port and port-range keys

   - sched: cls_api: fix error handling causing NULL dereference

   - tcp:
       - adjust rcvq_space after updating scaling ratio
       - drop secpath at the same time as we currently drop dst

   - eth: gtp: suppress list corruption splat in gtp_net_exit_batch_rtnl().

  Previous releases - always broken:

   - vsock:
       - fix variables initialization during resuming
       - for connectible sockets allow only connected

   - eth:
       - geneve: fix use-after-free in geneve_find_dev()
       - ibmvnic: don't reference skb after sending to VIOS"

* tag 'net-6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (34 commits)
  Revert "net: skb: introduce and use a single page frag cache"
  net: allow small head cache usage with large MAX_SKB_FRAGS values
  nfp: bpf: Add check for nfp_app_ctrl_msg_alloc()
  tcp: drop secpath at the same time as we currently drop dst
  net: axienet: Set mac_managed_pm
  arp: switch to dev_getbyhwaddr() in arp_req_set_public()
  net: Add non-RCU dev_getbyhwaddr() helper
  sctp: Fix undefined behavior in left shift operation
  selftests/bpf: Add a specific dst port matching
  flow_dissector: Fix port range key handling in BPF conversion
  selftests/net/forwarding: Add a test case for tc-flower of mixed port and port-range
  flow_dissector: Fix handling of mixed port and port-range keys
  geneve: Suppress list corruption splat in geneve_destroy_tunnels().
  gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().
  dev: Use rtnl_net_dev_lock() in unregister_netdev().
  net: Fix dev_net(dev) race in unregister_netdevice_notifier_dev_net().
  net: Add net_passive_inc() and net_passive_dec().
  net: pse-pd: pd692x0: Fix power limit retrieval
  MAINTAINERS: trim the GVE entry
  gve: set xdp redirect target only when it is available
  ...
2025-02-20 10:19:54 -08:00
Linus Torvalds
e9a8cac0bf Five SMB client fixes
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Merge tag 'v6.14-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client fixes from Steve French:

 - Fix for chmod regression

 - Two reparse point related fixes

 - One minor cleanup (for GCC 14 compiles)

 - Fix for SMB3.1.1 POSIX Extensions reporting incorrect file type

* tag 'v6.14-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Treat unhandled directory name surrogate reparse points as mount directory nodes
  cifs: Throw -EOPNOTSUPP error on unsupported reparse point type from parse_reparse_point()
  smb311: failure to open files of length 1040 when mounting with SMB3.1.1 POSIX extensions
  smb: client, common: Avoid multiple -Wflex-array-member-not-at-end warnings
  smb: client: fix chmod(2) regression with ATTR_READONLY
2025-02-20 08:59:00 -08:00
Linus Torvalds
bf0e5ed008 bcachefs fixes for 6.14-rc4
Small stuff:
 
 - The fsck code for Hongbo's directory i_size patch was wrong, caught by
   transaction restart injection: we now have the CI running another test
   variant with restart injection enabled
 
 - Another fixup for reflink pointers to missing indirect extents:
   previous fix was for fsck code, this fixes the normal runtime paths
 
 - Another small srcu lock hold time fix, reported by jpsollie
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Merge tag 'bcachefs-2025-02-20' of git://evilpiepirate.org/bcachefs

Pull bcachefs fixes from Kent Overstreet:
 "Small stuff:

   - The fsck code for Hongbo's directory i_size patch was wrong, caught
     by transaction restart injection: we now have the CI running
     another test variant with restart injection enabled

   - Another fixup for reflink pointers to missing indirect extents:
     previous fix was for fsck code, this fixes the normal runtime paths

   - Another small srcu lock hold time fix, reported by jpsollie"

* tag 'bcachefs-2025-02-20' of git://evilpiepirate.org/bcachefs:
  bcachefs: Fix srcu lock warning in btree_update_nodes_written()
  bcachefs: Fix bch2_indirect_extent_missing_error()
  bcachefs: Fix fsck directory i_size checking
2025-02-20 08:51:57 -08:00
Linus Torvalds
770b7eec04 XFS: Fixes for 6.14-rc4
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Merge tag 'xfs-fixes-6.14-rc4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Carlos Maiolino:
 "Just a collection of bug fixes, nothing really stands out"

* tag 'xfs-fixes-6.14-rc4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: flush inodegc before swapon
  xfs: rename xfs_iomap_swapfile_activate to xfs_vm_swap_activate
  xfs: Do not allow norecovery mount with quotacheck
  xfs: do not check NEEDSREPAIR if ro,norecovery mount.
  xfs: fix data fork format filtering during inode repair
  xfs: fix online repair probing when CONFIG_XFS_ONLINE_REPAIR=n
2025-02-20 08:48:55 -08:00
Paolo Abeni
dd3188ddc4 Merge branch 'net-remove-the-single-page-frag-cache-for-good'
Paolo Abeni says:

====================
net: remove the single page frag cache for good

This is another attempt at reverting commit dbae2b0628 ("net: skb:
introduce and use a single page frag cache"), as it causes regressions
in specific use-cases.

Reverting such commit uncovers an allocation issue for build with
CONFIG_MAX_SKB_FRAGS=45, as reported by Sabrina.

This series handle the latter in patch 1 and brings the revert in patch
2.

Note that there is a little chicken-egg problem, as I included into the
patch 1's changelog the splat that would be visible only applying first
the revert: I think current patch order is better for bisectability,
still the splat is useful for correct attribution.
====================

Link: https://patch.msgid.link/cover.1739899357.git.pabeni@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-20 10:53:32 +01:00
Paolo Abeni
6bc7e4eb04 Revert "net: skb: introduce and use a single page frag cache"
After the previous commit is finally safe to revert commit dbae2b0628
("net: skb: introduce and use a single page frag cache"): do it here.

The intended goal of such change was to counter a performance regression
introduced by commit 3226b158e6 ("net: avoid 32 x truesize
under-estimation for tiny skbs").

Unfortunately, the blamed commit introduces another regression for the
virtio_net driver. Such a driver calls napi_alloc_skb() with a tiny
size, so that the whole head frag could fit a 512-byte block.

The single page frag cache uses a 1K fragment for such allocation, and
the additional overhead, under small UDP packets flood, makes the page
allocator a bottleneck.

Thanks to commit bf9f1baa27 ("net: add dedicated kmem_cache for
typical/small skb->head"), this revert does not re-introduce the
original regression. Actually, in the relevant test on top of this
revert, I measure a small but noticeable positive delta, just above
noise level.

The revert itself required some additional mangling due to recent updates
in the affected code.

Suggested-by: Eric Dumazet <edumazet@google.com>
Fixes: dbae2b0628 ("net: skb: introduce and use a single page frag cache")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-20 10:53:25 +01:00
Paolo Abeni
14ad6ed30a net: allow small head cache usage with large MAX_SKB_FRAGS values
Sabrina reported the following splat:

    WARNING: CPU: 0 PID: 1 at net/core/dev.c:6935 netif_napi_add_weight_locked+0x8f2/0xba0
    Modules linked in:
    CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.14.0-rc1-net-00092-g011b03359038 #996
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014
    RIP: 0010:netif_napi_add_weight_locked+0x8f2/0xba0
    Code: e8 c3 e6 6a fe 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc c7 44 24 10 ff ff ff ff e9 8f fb ff ff e8 9e e6 6a fe <0f> 0b e9 d3 fe ff ff e8 92 e6 6a fe 48 8b 04 24 be ff ff ff ff 48
    RSP: 0000:ffffc9000001fc60 EFLAGS: 00010293
    RAX: 0000000000000000 RBX: ffff88806ce48128 RCX: 1ffff11001664b9e
    RDX: ffff888008f00040 RSI: ffffffff8317ca42 RDI: ffff88800b325cb6
    RBP: ffff88800b325c40 R08: 0000000000000001 R09: ffffed100167502c
    R10: ffff88800b3a8163 R11: 0000000000000000 R12: ffff88800ac1c168
    R13: ffff88800ac1c168 R14: ffff88800ac1c168 R15: 0000000000000007
    FS:  0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: ffff888008201000 CR3: 0000000004c94001 CR4: 0000000000370ef0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
    <TASK>
    gro_cells_init+0x1ba/0x270
    xfrm_input_init+0x4b/0x2a0
    xfrm_init+0x38/0x50
    ip_rt_init+0x2d7/0x350
    ip_init+0xf/0x20
    inet_init+0x406/0x590
    do_one_initcall+0x9d/0x2e0
    do_initcalls+0x23b/0x280
    kernel_init_freeable+0x445/0x490
    kernel_init+0x20/0x1d0
    ret_from_fork+0x46/0x80
    ret_from_fork_asm+0x1a/0x30
    </TASK>
    irq event stamp: 584330
    hardirqs last  enabled at (584338): [<ffffffff8168bf87>] __up_console_sem+0x77/0xb0
    hardirqs last disabled at (584345): [<ffffffff8168bf6c>] __up_console_sem+0x5c/0xb0
    softirqs last  enabled at (583242): [<ffffffff833ee96d>] netlink_insert+0x14d/0x470
    softirqs last disabled at (583754): [<ffffffff8317c8cd>] netif_napi_add_weight_locked+0x77d/0xba0

on kernel built with MAX_SKB_FRAGS=45, where SKB_WITH_OVERHEAD(1024)
is smaller than GRO_MAX_HEAD.

Such built additionally contains the revert of the single page frag cache
so that napi_get_frags() ends up using the page frag allocator, triggering
the splat.

Note that the underlying issue is independent from the mentioned
revert; address it ensuring that the small head cache will fit either TCP
and GRO allocation and updating napi_alloc_skb() and __netdev_alloc_skb()
to select kmalloc() usage for any allocation fitting such cache.

Reported-by: Sabrina Dubroca <sd@queasysnail.net>
Suggested-by: Eric Dumazet <edumazet@google.com>
Fixes: 3948b05950 ("net: introduce a config option to tweak MAX_SKB_FRAGS")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-20 10:53:17 +01:00
Haoxiang Li
878e7b1173 nfp: bpf: Add check for nfp_app_ctrl_msg_alloc()
Add check for the return value of nfp_app_ctrl_msg_alloc() in
nfp_bpf_cmsg_alloc() to prevent null pointer dereference.

Fixes: ff3d43f756 ("nfp: bpf: implement helpers for FW map ops")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Link: https://patch.msgid.link/20250218030409.2425798-1-haoxiang_li2024@163.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-20 09:35:49 +01:00
Sabrina Dubroca
9b6412e697 tcp: drop secpath at the same time as we currently drop dst
Xiumei reported hitting the WARN in xfrm6_tunnel_net_exit while
running tests that boil down to:
 - create a pair of netns
 - run a basic TCP test over ipcomp6
 - delete the pair of netns

The xfrm_state found on spi_byaddr was not deleted at the time we
delete the netns, because we still have a reference on it. This
lingering reference comes from a secpath (which holds a ref on the
xfrm_state), which is still attached to an skb. This skb is not
leaked, it ends up on sk_receive_queue and then gets defer-free'd by
skb_attempt_defer_free.

The problem happens when we defer freeing an skb (push it on one CPU's
defer_list), and don't flush that list before the netns is deleted. In
that case, we still have a reference on the xfrm_state that we don't
expect at this point.

We already drop the skb's dst in the TCP receive path when it's no
longer needed, so let's also drop the secpath. At this point,
tcp_filter has already called into the LSM hooks that may require the
secpath, so it should not be needed anymore. However, in some of those
places, the MPTCP extension has just been attached to the skb, so we
cannot simply drop all extensions.

Fixes: 68822bdf76 ("net: generalize skb freeing deferral to per-cpu lists")
Reported-by: Xiumei Mu <xmu@redhat.com>
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/5055ba8f8f72bdcb602faa299faca73c280b7735.1739743613.git.sd@queasysnail.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-20 09:24:08 +01:00
Nick Hu
a370295367 net: axienet: Set mac_managed_pm
The external PHY will undergo a soft reset twice during the resume process
when it wake up from suspend. The first reset occurs when the axienet
driver calls phylink_of_phy_connect(), and the second occurs when
mdio_bus_phy_resume() invokes phy_init_hw(). The second soft reset of the
external PHY does not reinitialize the internal PHY, which causes issues
with the internal PHY, resulting in the PHY link being down. To prevent
this, setting the mac_managed_pm flag skips the mdio_bus_phy_resume()
function.

Fixes: a129b41fe0 ("Revert "net: phy: dp83867: perform soft reset and retain established link"")
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20250217055843.19799-1-nick.hu@sifive.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-02-20 09:14:04 +01:00
Jakub Kicinski
62520094e9 Merge branch 'net-core-improvements-to-device-lookup-by-hardware-address'
Breno Leitao says:

====================
net: core: improvements to device lookup by hardware address.

The first patch adds a new dev_getbyhwaddr() helper function for
finding devices by hardware address when the rtnl lock is held. This
prevents PROVE_LOCKING warnings that occurred when rtnl lock was held
but the RCU read lock wasn't. The common address comparison logic is
extracted into dev_comp_addr() to avoid code duplication.

The second coverts arp_req_set_public() to the new helper.
====================

Link: https://patch.msgid.link/20250218-arm_fix_selftest-v5-0-d3d6892db9e1@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 19:01:00 -08:00
Breno Leitao
4eae0ee0f1 arp: switch to dev_getbyhwaddr() in arp_req_set_public()
The arp_req_set_public() function is called with the rtnl lock held,
which provides enough synchronization protection. This makes the RCU
variant of dev_getbyhwaddr() unnecessary. Switch to using the simpler
dev_getbyhwaddr() function since we already have the required rtnl
locking.

This change helps maintain consistency in the networking code by using
the appropriate helper function for the existing locking context.
Since we're not holding the RCU read lock in arp_req_set_public()
existing code could trigger false positive locking warnings.

Fixes: 941666c2e3 ("net: RCU conversion of dev_getbyhwaddr() and arp_ioctl()")
Suggested-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20250218-arm_fix_selftest-v5-2-d3d6892db9e1@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 19:00:01 -08:00
Breno Leitao
4b5a28b38c net: Add non-RCU dev_getbyhwaddr() helper
Add dedicated helper for finding devices by hardware address when
holding rtnl_lock, similar to existing dev_getbyhwaddr_rcu(). This prevents
PROVE_LOCKING warnings when rtnl_lock is held but RCU read lock is not.

Extract common address comparison logic into dev_addr_cmp().

The context about this change could be found in the following
discussion:

Link: https://lore.kernel.org/all/20250206-scarlet-ermine-of-improvement-1fcac5@leitao/

Cc: kuniyu@amazon.com
Cc: ushankar@purestorage.com
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250218-arm_fix_selftest-v5-1-d3d6892db9e1@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:59:29 -08:00
Yu-Chun Lin
606572eb22 sctp: Fix undefined behavior in left shift operation
According to the C11 standard (ISO/IEC 9899:2011, 6.5.7):
"If E1 has a signed type and E1 x 2^E2 is not representable in the result
type, the behavior is undefined."

Shifting 1 << 31 causes signed integer overflow, which leads to undefined
behavior.

Fix this by explicitly using '1U << 31' to ensure the shift operates on
an unsigned type, avoiding undefined behavior.

Signed-off-by: Yu-Chun Lin <eleanor15x@gmail.com>
Link: https://patch.msgid.link/20250218081217.3468369-1-eleanor15x@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:55:40 -08:00
Jakub Kicinski
5bcd3d15ca Merge branch 'flow_dissector-fix-handling-of-mixed-port-and-port-range-keys'
Cong Wang says:

====================
flow_dissector: Fix handling of mixed port and port-range keys

This patchset contains two fixes for flow_dissector handling of mixed
port and port-range keys, for both tc-flower case and bpf case. Each
of them also comes with a selftest.
====================

Link: https://patch.msgid.link/20250218043210.732959-1-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:55:33 -08:00
Cong Wang
15de6ba95d selftests/bpf: Add a specific dst port matching
After this patch:

 #102/1   flow_dissector_classification/ipv4:OK
 #102/2   flow_dissector_classification/ipv4_continue_dissect:OK
 #102/3   flow_dissector_classification/ipip:OK
 #102/4   flow_dissector_classification/gre:OK
 #102/5   flow_dissector_classification/port_range:OK
 #102/6   flow_dissector_classification/ipv6:OK
 #102     flow_dissector_classification:OK
 Summary: 1/6 PASSED, 0 SKIPPED, 0 FAILED

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Link: https://patch.msgid.link/20250218043210.732959-5-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:54:59 -08:00
Cong Wang
69ab34f705 flow_dissector: Fix port range key handling in BPF conversion
Fix how port range keys are handled in __skb_flow_bpf_to_target() by:
- Separating PORTS and PORTS_RANGE key handling
- Using correct key_ports_range structure for range keys
- Properly initializing both key types independently

This ensures port range information is correctly stored in its dedicated
structure rather than incorrectly using the regular ports key structure.

Fixes: 59fb9b62fb ("flow_dissector: Fix to use new variables for port ranges in bpf hook")
Reported-by: Qiang Zhang <dtzq01@gmail.com>
Closes: https://lore.kernel.org/netdev/CAPx+-5uvFxkhkz4=j_Xuwkezjn9U6kzKTD5jz4tZ9msSJ0fOJA@mail.gmail.com/
Cc: Yoshiki Komachi <komachi.yoshiki@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Link: https://patch.msgid.link/20250218043210.732959-4-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:54:59 -08:00
Cong Wang
dfc1580f96 selftests/net/forwarding: Add a test case for tc-flower of mixed port and port-range
After this patch:

 # ./tc_flower_port_range.sh
 TEST: Port range matching - IPv4 UDP                                [ OK ]
 TEST: Port range matching - IPv4 TCP                                [ OK ]
 TEST: Port range matching - IPv6 UDP                                [ OK ]
 TEST: Port range matching - IPv6 TCP                                [ OK ]
 TEST: Port range matching - IPv4 UDP Drop                           [ OK ]

Cc: Qiang Zhang <dtzq01@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20250218043210.732959-3-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:54:59 -08:00
Cong Wang
3e5796862c flow_dissector: Fix handling of mixed port and port-range keys
This patch fixes a bug in TC flower filter where rules combining a
specific destination port with a source port range weren't working
correctly.

The specific case was when users tried to configure rules like:

tc filter add dev ens38 ingress protocol ip flower ip_proto udp \
dst_port 5000 src_port 2000-3000 action drop

The root cause was in the flow dissector code. While both
FLOW_DISSECTOR_KEY_PORTS and FLOW_DISSECTOR_KEY_PORTS_RANGE flags
were being set correctly in the classifier, the __skb_flow_dissect_ports()
function was only populating one of them: whichever came first in
the enum check. This meant that when the code needed both a specific
port and a port range, one of them would be left as 0, causing the
filter to not match packets as expected.

Fix it by removing the either/or logic and instead checking and
populating both key types independently when they're in use.

Fixes: 8ffb055bea ("cls_flower: Fix the behavior using port ranges with hw-offload")
Reported-by: Qiang Zhang <dtzq01@gmail.com>
Closes: https://lore.kernel.org/netdev/CAPx+-5uvFxkhkz4=j_Xuwkezjn9U6kzKTD5jz4tZ9msSJ0fOJA@mail.gmail.com/
Cc: Yoshiki Komachi <komachi.yoshiki@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20250218043210.732959-2-xiyou.wangcong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:54:58 -08:00
Jakub Kicinski
346b3416fd Merge branch 'gtp-geneve-suppress-list_del-splat-during-exit_batch_rtnl'
Kuniyuki Iwashima says:

====================
gtp/geneve: Suppress list_del() splat during ->exit_batch_rtnl().

The common pattern in tunnel device's ->exit_batch_rtnl() is iterating
two netdev lists for each netns: (i) for_each_netdev() to clean up
devices in the netns, and (ii) the device type specific list to clean
up devices in other netns.

	list_for_each_entry(net, net_list, exit_list) {
		for_each_netdev_safe(net, dev, next) {
			/* (i)  call unregister_netdevice_queue(dev, list) */
		}

		list_for_each_entry_safe(xxx, xxx_next, &net->yyy, zzz) {
			/* (ii) call unregister_netdevice_queue(xxx->dev, list) */
		}
	}

Then, ->exit_batch_rtnl() could touch the same device twice.

Say we have two netns A & B and device B that is created in netns A and
moved to netns B.

  1. cleanup_net() processes netns A and then B.

  2. ->exit_batch_rtnl() finds the device B while iterating netns A's (ii)

  [ device B is not yet unlinked from netns B as
    unregister_netdevice_many() has not been called. ]

  3. ->exit_batch_rtnl() finds the device B while iterating netns B's (i)

gtp and geneve calls ->dellink() at 2. and 3. that calls list_del() for (ii)
and unregister_netdevice_queue().

Calling unregister_netdevice_queue() twice is fine because it uses
list_move_tail(), but the 2nd list_del() triggers a splat when
CONFIG_DEBUG_LIST is enabled.

Possible solution is either of

 (a) Use list_del_init() in ->dellink()

 (b) Iterate dev with empty ->unreg_list for (i) like

	#define for_each_netdev_alive(net, d)				\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)	\
			if (list_empty(&d->unreg_list))

 (c) Remove (i) and delegate it to default_device_exit_batch().

This series avoids the 2nd ->dellink() by (c) to suppress the splat for
gtp and geneve.

Note that IPv4/IPv6 tunnels calls just unregister_netdevice() during
->exit_batch_rtnl() and dev is unlinked from (ii) later in ->ndo_uninit(),
so they are safe.

Also, pfcp has the same pattern but is safe because
unregister_netdevice_many() is called for each netns.
====================

Link: https://patch.msgid.link/20250217203705.40342-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:49:31 -08:00
Kuniyuki Iwashima
62fab6eef6 geneve: Suppress list corruption splat in geneve_destroy_tunnels().
As explained in the previous patch, iterating for_each_netdev() and
gn->geneve_list during ->exit_batch_rtnl() could trigger ->dellink()
twice for the same device.

If CONFIG_DEBUG_LIST is enabled, we will see a list_del() corruption
splat in the 2nd call of geneve_dellink().

Let's remove for_each_netdev() in geneve_destroy_tunnels() and delegate
that part to default_device_exit_batch().

Fixes: 9593172d93 ("geneve: Fix use-after-free in geneve_find_dev().")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250217203705.40342-3-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:49:29 -08:00
Kuniyuki Iwashima
4ccacf8649 gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().
Brad Spengler reported the list_del() corruption splat in
gtp_net_exit_batch_rtnl(). [0]

Commit eb28fd76c0 ("gtp: Destroy device along with udp socket's netns
dismantle.") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl()
to destroy devices in each netns as done in geneve and ip tunnels.

However, this could trigger ->dellink() twice for the same device during
->exit_batch_rtnl().

Say we have two netns A & B and gtp device B that resides in netns B but
whose UDP socket is in netns A.

  1. cleanup_net() processes netns A and then B.

  2. gtp_net_exit_batch_rtnl() finds the device B while iterating
     netns A's gn->gtp_dev_list and calls ->dellink().

  [ device B is not yet unlinked from netns B
    as unregister_netdevice_many() has not been called. ]

  3. gtp_net_exit_batch_rtnl() finds the device B while iterating
     netns B's for_each_netdev() and calls ->dellink().

gtp_dellink() cleans up the device's hash table, unlinks the dev from
gn->gtp_dev_list, and calls unregister_netdevice_queue().

Basically, calling gtp_dellink() multiple times is fine unless
CONFIG_DEBUG_LIST is enabled.

Let's remove for_each_netdev() in gtp_net_exit_batch_rtnl() and
delegate the destruction to default_device_exit_batch() as done
in bareudp.

[0]:
list_del corruption, ffff8880aaa62c00->next (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04)
kernel BUG at lib/list_debug.c:58!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G                T   6.12.13-grsec-full-20250211091339 #1
Tainted: [T]=RANDSTRUCT
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:[<ffffffff84947381>] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58
Code: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc <0f> 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60
RSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283
RAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054
RDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000
RBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32
R10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4
R13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08
RBX: kasan shadow of 0x0
RCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554
RDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58
RSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71
RBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]
RSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ]
R09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ]
R10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ]
R15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object]
FS:  0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0
Stack:
 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00
 ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005
 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d
Call Trace:
 <TASK>
 [<ffffffff8a0c360d>] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28
 [<ffffffff8a0c360d>] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28
 [<ffffffff8a0c360d>] list_del include/linux/list.h:262 [inline] fffffe8040b4fc28
 [<ffffffff8a0c360d>] gtp_dellink+0x16d/0x360 drivers/net/gtp.c:1557 fffffe8040b4fc28
 [<ffffffff8a0d0404>] gtp_net_exit_batch_rtnl+0x124/0x2c0 drivers/net/gtp.c:2495 fffffe8040b4fc88
 [<ffffffff8e705b24>] cleanup_net+0x5a4/0xbe0 net/core/net_namespace.c:635 fffffe8040b4fcd0
 [<ffffffff81754c97>] process_one_work+0xbd7/0x2160 kernel/workqueue.c:3326 fffffe8040b4fd88
 [<ffffffff81757195>] process_scheduled_works kernel/workqueue.c:3407 [inline] fffffe8040b4fec0
 [<ffffffff81757195>] worker_thread+0x6b5/0xfa0 kernel/workqueue.c:3488 fffffe8040b4fec0
 [<ffffffff817782a0>] kthread+0x360/0x4c0 kernel/kthread.c:397 fffffe8040b4ff78
 [<ffffffff814d8594>] ret_from_fork+0x74/0xe0 arch/x86/kernel/process.c:172 fffffe8040b4ffb8
 [<ffffffff8110f509>] ret_from_fork_asm+0x29/0xc0 arch/x86/entry/entry_64.S:399 fffffe8040b4ffe8
 </TASK>
Modules linked in:

Fixes: eb28fd76c0 ("gtp: Destroy device along with udp socket's netns dismantle.")
Reported-by: Brad Spengler <spender@grsecurity.net>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250217203705.40342-2-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-19 18:49:28 -08:00
Linus Torvalds
87a132e739 18 hotfixes. 5 are cc:stable and the remainder address post-6.13 issues
or aren't considered necessary for -stable kernels.
 
 10 are for MM and 8 are for non-MM.  All are singletons, please see the
 changelogs for details.
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Merge tag 'mm-hotfixes-stable-2025-02-19-17-49' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "18 hotfixes. 5 are cc:stable and the remainder address post-6.13
  issues or aren't considered necessary for -stable kernels.

  10 are for MM and 8 are for non-MM. All are singletons, please see the
  changelogs for details"

* tag 'mm-hotfixes-stable-2025-02-19-17-49' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  test_xarray: fix failure in check_pause when CONFIG_XARRAY_MULTI is not defined
  kasan: don't call find_vm_area() in a PREEMPT_RT kernel
  MAINTAINERS: update Nick's contact info
  selftests/mm: fix check for running THP tests
  mm: hugetlb: avoid fallback for specific node allocation of 1G pages
  memcg: avoid dead loop when setting memory.max
  mailmap: update Nick's entry
  mm: pgtable: fix incorrect reclaim of non-empty PTE pages
  taskstats: modify taskstats version
  getdelays: fix error format characters
  mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()
  tools/mm: fix build warnings with musl-libc
  mailmap: add entry for Feng Tang
  .mailmap: add entries for Jeff Johnson
  mm,madvise,hugetlb: check for 0-length range after end address adjustment
  mm/zswap: fix inconsistency when zswap_store_page() fails
  lib/iov_iter: fix import_iovec_ubuf iovec management
  procfs: fix a locking bug in a vmcore_add_device_dump() error path
2025-02-19 18:11:28 -08:00
Kent Overstreet
b04974f759 bcachefs: Fix srcu lock warning in btree_update_nodes_written()
We don't want to be holding the srcu lock while waiting on btree write
completions - easily fixed.

Reported-by: Janpieter Sollie <janpieter.sollie@edpnet.be>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-02-19 18:52:42 -05:00
Kent Overstreet
4fd509c10f bcachefs: Fix bch2_indirect_extent_missing_error()
We had some error handling confusion here;
-BCH_ERR_missing_indirect_extent is thrown by
trans_trigger_reflink_p_segment(); at this point we haven't decide
whether we're generating an error.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-02-19 17:33:13 -05:00
Kent Overstreet
b9ddb3e1a8 bcachefs: Fix fsck directory i_size checking
Error handling was wrong, causing unhandled transaction restart errors.

check_directory_size() was also inefficient, since keys in multiple
snapshots would be iterated over once for every snapshot. Convert it to
the same scheme used for i_sectors and subdir count checking.

Cc: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2025-02-19 13:52:27 -05:00
Pali Rohár
b587fd1286 cifs: Treat unhandled directory name surrogate reparse points as mount directory nodes
If the reparse point was not handled (indicated by the -EOPNOTSUPP from
ops->parse_reparse_point() call) but reparse tag is of type name surrogate
directory type, then treat is as a new mount point.

Name surrogate reparse point represents another named entity in the system.

From SMB client point of view, this another entity is resolved on the SMB
server, and server serves its content automatically. Therefore from Linux
client point of view, this name surrogate reparse point of directory type
crosses mount point.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-02-19 10:42:27 -06:00
Pali Rohár
cad3fc0a4c cifs: Throw -EOPNOTSUPP error on unsupported reparse point type from parse_reparse_point()
This would help to track and detect by caller if the reparse point type was
processed or not.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-02-19 10:42:25 -06:00
Steve French
9df23801c8 smb311: failure to open files of length 1040 when mounting with SMB3.1.1 POSIX extensions
If a file size has bits 0x410 = ATTR_DIRECTORY | ATTR_REPARSE set
then during queryinfo (stat) the file is regarded as a directory
and subsequent opens can fail. A simple test example is trying
to open any file 1040 bytes long when mounting with "posix"
(SMB3.1.1 POSIX/Linux Extensions).

The cause of this bug is that Attributes field in smb2_file_all_info
struct occupies the same place that EndOfFile field in
smb311_posix_qinfo, and sometimes the latter struct is incorrectly
processed as if it was the first one.

Reported-by: Oleh Nykyforchyn <oleh.nyk@gmail.com>
Tested-by: Oleh Nykyforchyn <oleh.nyk@gmail.com>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-02-19 10:41:16 -06:00
Gustavo A. R. Silva
7330195e60 smb: client, common: Avoid multiple -Wflex-array-member-not-at-end warnings
-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

So, in order to avoid ending up with flexible-array members in the
middle of other structs, we use the `__struct_group()` helper to
separate the flexible arrays from the rest of the members in the
flexible structures. We then use the newly created tagged `struct
smb2_file_link_info_hdr` and `struct smb2_file_rename_info_hdr`
to replace the type of the objects causing trouble: `rename_info`
and `link_info` in `struct smb2_compound_vars`.

We also want to ensure that when new members need to be added to the
flexible structures, they are always included within the newly created
tagged structs. For this, we use `static_assert()`. This ensures that the
memory layout for both the flexible structure and the new tagged struct
is the same after any changes.

So, with these changes, fix 86 of the following warnings:

fs/smb/client/cifsglob.h:2335:36: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
fs/smb/client/cifsglob.h:2334:38: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2025-02-19 10:39:32 -06:00
Jakub Kicinski
a92c322876 Merge branch 'net-fix-race-of-rtnl_net_lock-dev_net-dev'
Kuniyuki Iwashima says:

====================
net: Fix race of rtnl_net_lock(dev_net(dev)).

Yael Chemla reported that commit 7fb1073300 ("net: Hold rtnl_net_lock()
in (un)?register_netdevice_notifier_dev_net().") started to trigger KASAN's
use-after-free splat.

The problem is that dev_net(dev) fetched before rtnl_net_lock() might be
different after rtnl_net_lock().

The patch 2 fixes the issue by checking dev_net(dev) after rtnl_net_lock(),
and the patch 3 fixes the same potential issue that would emerge once RTNL
is removed.

v4: https://lore.kernel.org/20250212064206.18159-1-kuniyu@amazon.com
v3: https://lore.kernel.org/20250211051217.12613-1-kuniyu@amazon.com
v2: https://lore.kernel.org/20250207044251.65421-1-kuniyu@amazon.com
v1: https://lore.kernel.org/20250130232435.43622-1-kuniyu@amazon.com
====================

Link: https://patch.msgid.link/20250217191129.19967-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 18:33:32 -08:00
Kuniyuki Iwashima
d4c6bfc839 dev: Use rtnl_net_dev_lock() in unregister_netdev().
The following sequence is basically illegal when dev was fetched
without lookup because dev_net(dev) might be different after holding
rtnl_net_lock():

  net = dev_net(dev);
  rtnl_net_lock(net);

Let's use rtnl_net_dev_lock() in unregister_netdev().

Note that there is no real bug in unregister_netdev() for now
because RTNL protects the scope even if dev_net(dev) is changed
before/after RTNL.

Fixes: 00fb982393 ("dev: Hold per-netns RTNL in (un)?register_netdev().")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250217191129.19967-4-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 18:33:30 -08:00
Kuniyuki Iwashima
65161fb544 net: Fix dev_net(dev) race in unregister_netdevice_notifier_dev_net().
After the cited commit, dev_net(dev) is fetched before holding RTNL
and passed to __unregister_netdevice_notifier_net().

However, dev_net(dev) might be different after holding RTNL.

In the reported case [0], while removing a VF device, its netns was
being dismantled and the VF was moved to init_net.

So the following sequence is basically illegal when dev was fetched
without lookup:

  net = dev_net(dev);
  rtnl_net_lock(net);

Let's use a new helper rtnl_net_dev_lock() to fix the race.

It fetches dev_net_rcu(dev), bumps its net->passive, and checks if
dev_net_rcu(dev) is changed after rtnl_net_lock().

[0]:
BUG: KASAN: slab-use-after-free in notifier_call_chain (kernel/notifier.c:75 (discriminator 2))
Read of size 8 at addr ffff88810cefb4c8 by task test-bridge-lag/21127
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl (lib/dump_stack.c:123)
 print_report (mm/kasan/report.c:379 mm/kasan/report.c:489)
 kasan_report (mm/kasan/report.c:604)
 notifier_call_chain (kernel/notifier.c:75 (discriminator 2))
 call_netdevice_notifiers_info (net/core/dev.c:2011)
 unregister_netdevice_many_notify (net/core/dev.c:11551)
 unregister_netdevice_queue (net/core/dev.c:11487)
 unregister_netdev (net/core/dev.c:11635)
 mlx5e_remove (drivers/net/ethernet/mellanox/mlx5/core/en_main.c:6552 drivers/net/ethernet/mellanox/mlx5/core/en_main.c:6579) mlx5_core
 auxiliary_bus_remove (drivers/base/auxiliary.c:230)
 device_release_driver_internal (drivers/base/dd.c:1275 drivers/base/dd.c:1296)
 bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:583)
 device_del (drivers/base/power/power.h:142 drivers/base/core.c:3855)
 mlx5_rescan_drivers_locked (./include/linux/auxiliary_bus.h:241 drivers/net/ethernet/mellanox/mlx5/core/dev.c:333 drivers/net/ethernet/mellanox/mlx5/core/dev.c:535 drivers/net/ethernet/mellanox/mlx5/core/dev.c:549) mlx5_core
 mlx5_unregister_device (drivers/net/ethernet/mellanox/mlx5/core/dev.c:468) mlx5_core
 mlx5_uninit_one (./include/linux/instrumented.h:68 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 drivers/net/ethernet/mellanox/mlx5/core/main.c:1563) mlx5_core
 remove_one (drivers/net/ethernet/mellanox/mlx5/core/main.c:965 drivers/net/ethernet/mellanox/mlx5/core/main.c:2019) mlx5_core
 pci_device_remove (./include/linux/pm_runtime.h:129 drivers/pci/pci-driver.c:475)
 device_release_driver_internal (drivers/base/dd.c:1275 drivers/base/dd.c:1296)
 unbind_store (drivers/base/bus.c:245)
 kernfs_fop_write_iter (fs/kernfs/file.c:338)
 vfs_write (fs/read_write.c:587 (discriminator 1) fs/read_write.c:679 (discriminator 1))
 ksys_write (fs/read_write.c:732)
 do_syscall_64 (arch/x86/entry/common.c:52 (discriminator 1) arch/x86/entry/common.c:83 (discriminator 1))
 entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
RIP: 0033:0x7f6a4d5018b7

Fixes: 7fb1073300 ("net: Hold rtnl_net_lock() in (un)?register_netdevice_notifier_dev_net().")
Reported-by: Yael Chemla <ychemla@nvidia.com>
Closes: https://lore.kernel.org/netdev/146eabfe-123c-4970-901e-e961b4c09bc3@nvidia.com/
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250217191129.19967-3-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 18:33:30 -08:00
Kuniyuki Iwashima
e57a632021 net: Add net_passive_inc() and net_passive_dec().
net_drop_ns() is NULL when CONFIG_NET_NS is disabled.

The next patch introduces a function that increments
and decrements net->passive.

As a prep, let's rename and export net_free() to
net_passive_dec() and add net_passive_inc().

Suggested-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/netdev/CANn89i+oUCt2VGvrbrweniTendZFEh+nwS=uonc004-aPkWy-Q@mail.gmail.com/
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250217191129.19967-2-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 18:33:29 -08:00
Kory Maincent
f6093c5ec7 net: pse-pd: pd692x0: Fix power limit retrieval
Fix incorrect data offset read in the pd692x0_pi_get_pw_limit callback.
The issue was previously unnoticed as it was only used by the regulator
API and not thoroughly tested, since the PSE is mainly controlled via
ethtool.

The function became actively used by ethtool after commit 3e9dbfec49
("net: pse-pd: Split ethtool_get_status into multiple callbacks"),
which led to the discovery of this issue.

Fix it by using the correct data offset.

Fixes: a87e699c9d ("net: pse-pd: pd692x0: Enhance with new current limit and voltage read callbacks")
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20250217134812.1925345-1-kory.maincent@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 18:30:27 -08:00
Jakub Kicinski
2f56be7f52 MAINTAINERS: trim the GVE entry
We requested in the past that GVE patches coming out of Google should
be submitted only by GVE maintainers. There were too many patches
posted which didn't follow the subsystem guidance.

Recently Joshua was added to maintainers, but even tho he was asked
to follow the netdev "FAQ" in the past [1] he does not follow
the local customs. It is not reasonable for a person who hasn't read
the maintainer entry for the subsystem to be a driver maintainer.

We can re-add once Joshua does some on-list reviews to prove
the fluency with the upstream process.

Link: https://lore.kernel.org/20240610172720.073d5912@kernel.org # [1]
Link: https://patch.msgid.link/20250215162646.2446559-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 18:06:18 -08:00
Joshua Washington
415cadd505 gve: set xdp redirect target only when it is available
Before this patch the NETDEV_XDP_ACT_NDO_XMIT XDP feature flag is set by
default as part of driver initialization, and is never cleared. However,
this flag differs from others in that it is used as an indicator for
whether the driver is ready to perform the ndo_xdp_xmit operation as
part of an XDP_REDIRECT. Kernel helpers
xdp_features_(set|clear)_redirect_target exist to convey this meaning.

This patch ensures that the netdev is only reported as a redirect target
when XDP queues exist to forward traffic.

Fixes: 39a7f4aa3e ("gve: Add XDP REDIRECT support for GQI-QPL format")
Cc: stable@vger.kernel.org
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Jeroen de Borst <jeroendb@google.com>
Signed-off-by: Joshua Washington <joshwash@google.com>
Link: https://patch.msgid.link/20250214224417.1237818-1-joshwash@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 18:01:24 -08:00
Jakub Kicinski
f5da7c4518 tcp: adjust rcvq_space after updating scaling ratio
Since commit under Fixes we set the window clamp in accordance
to newly measured rcvbuf scaling_ratio. If the scaling_ratio
decreased significantly we may put ourselves in a situation
where windows become smaller than rcvq_space, preventing
tcp_rcv_space_adjust() from increasing rcvbuf.

The significant decrease of scaling_ratio is far more likely
since commit 697a6c8cec ("tcp: increase the default TCP scaling ratio"),
which increased the "default" scaling ratio from ~30% to 50%.

Hitting the bad condition depends a lot on TCP tuning, and
drivers at play. One of Meta's workloads hits it reliably
under following conditions:
 - default rcvbuf of 125k
 - sender MTU 1500, receiver MTU 5000
 - driver settles on scaling_ratio of 78 for the config above.
Initial rcvq_space gets calculated as TCP_INIT_CWND * tp->advmss
(10 * 5k = 50k). Once we find out the true scaling ratio and
MSS we clamp the windows to 38k. Triggering the condition also
depends on the message sequence of this workload. I can't repro
the problem with simple iperf or TCP_RR-style tests.

Fixes: a2cbb16039 ("tcp: Update window clamping condition")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Link: https://patch.msgid.link/20250217232905.3162187-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-18 16:02:18 -08:00
Linus Torvalds
6537cfb395 sound fixes for 6.14-rc4
A slightly large collection of fixes, spread over various drivers.
 Almost all are small and device-specific fixes and quirks in ASoC
 SOF Intel and AMD, Renesas, Cirrus, HD-audio, in addition to a small
 fix for MIDI 2.0.
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Merge tag 'sound-6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A slightly large collection of fixes, spread over various drivers.

  Almost all are small and device-specific fixes and quirks in ASoC SOF
  Intel and AMD, Renesas, Cirrus, HD-audio, in addition to a small fix
  for MIDI 2.0"

* tag 'sound-6.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (41 commits)
  ALSA: seq: Drop UMP events when no UMP-conversion is set
  ALSA: hda/conexant: Add quirk for HP ProBook 450 G4 mute LED
  ALSA: hda/cirrus: Reduce codec resume time
  ALSA: hda/cirrus: Correct the full scale volume set logic
  virtio_snd.h: clarify that `controls` depends on VIRTIO_SND_F_CTLS
  ALSA: hda: Add error check for snd_ctl_rename_id() in snd_hda_create_dig_out_ctls()
  ALSA: hda/tas2781: Fix index issue in tas2781 hda SPI driver
  ASoC: imx-audmix: remove cpu_mclk which is from cpu dai device
  ALSA: hda/realtek: Fixup ALC225 depop procedure
  ALSA: hda/tas2781: Update tas2781 hda SPI driver
  ASoC: cs35l41: Fix acpi_device_hid() not found
  ASoC: SOF: amd: Add branch prediction hint in ACP IRQ handler
  ASoC: SOF: amd: Handle IPC replies before FW_BOOT_COMPLETE
  ASoC: SOF: amd: Drop unused includes from Vangogh driver
  ASoC: SOF: amd: Add post_fw_run_delay ACP quirk
  ASoC: Intel: soc-acpi-intel-ptl-match: revise typo of rt713_vb_l2_rt1320_l13
  ASoC: Intel: soc-acpi-intel-ptl-match: revise typo of rt712_vb + rt1320 support
  ALSA: Switch to use hrtimer_setup()
  ALSA: hda: hda-intel: add Panther Lake-H support
  ASoC: SOF: Intel: pci-ptl: Add support for PTL-H
  ...
2025-02-18 09:00:31 -08:00