Guchun Chen 2dedcf414b drm/ttm: check null pointer before accessing when swapping ... Add a check to avoid null pointer dereference as below: [ 90.002283] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 90.002292] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 90.002346] ? exc_general_protection+0x159/0x240 [ 90.002352] ? asm_exc_general_protection+0x26/0x30 [ 90.002357] ? ttm_bo_evict_swapout_allowable+0x322/0x5e0 [ttm] [ 90.002365] ? ttm_bo_evict_swapout_allowable+0x42e/0x5e0 [ttm] [ 90.002373] ttm_bo_swapout+0x134/0x7f0 [ttm] [ 90.002383] ? __pfx_ttm_bo_swapout+0x10/0x10 [ttm] [ 90.002391] ? lock_acquire+0x44d/0x4f0 [ 90.002398] ? ttm_device_swapout+0xa5/0x260 [ttm] [ 90.002412] ? lock_acquired+0x355/0xa00 [ 90.002416] ? do_raw_spin_trylock+0xb6/0x190 [ 90.002421] ? __pfx_lock_acquired+0x10/0x10 [ 90.002426] ? ttm_global_swapout+0x25/0x210 [ttm] [ 90.002442] ttm_device_swapout+0x198/0x260 [ttm] [ 90.002456] ? __pfx_ttm_device_swapout+0x10/0x10 [ttm] [ 90.002472] ttm_global_swapout+0x75/0x210 [ttm] [ 90.002486] ttm_tt_populate+0x187/0x3f0 [ttm] [ 90.002501] ttm_bo_handle_move_mem+0x437/0x590 [ttm] [ 90.002517] ttm_bo_validate+0x275/0x430 [ttm] [ 90.002530] ? __pfx_ttm_bo_validate+0x10/0x10 [ttm] [ 90.002544] ? kasan_save_stack+0x33/0x60 [ 90.002550] ? kasan_set_track+0x25/0x30 [ 90.002554] ? __kasan_kmalloc+0x8f/0xa0 [ 90.002558] ? amdgpu_gtt_mgr_new+0x81/0x420 [amdgpu] [ 90.003023] ? ttm_resource_alloc+0xf6/0x220 [ttm] [ 90.003038] amdgpu_bo_pin_restricted+0x2dd/0x8b0 [amdgpu] [ 90.003210] ? __x64_sys_ioctl+0x131/0x1a0 [ 90.003210] ? do_syscall_64+0x60/0x90 Fixes: a2848d0874 ("drm/ttm: never consider pinned BOs for eviction&swap") Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> Signed-off-by: Guchun Chen <guchun.chen@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Cc: stable@vger.kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20230724024229.1118444-1-guchun.chen@amd.com Signed-off-by: Christian König <christian.koenig@amd.com>		2023-07-27 09:51:51 +02:00
..
Makefile	drm/ttm: add ttm_sys_manager v3	2021-05-03 12:50:41 +02:00
ttm_agp_backend.c	drm/ttm: Add a parameter to add extra pages into ttm_tt	2022-04-02 08:22:48 +05:30
ttm_bo.c	drm/ttm: check null pointer before accessing when swapping	2023-07-27 09:51:51 +02:00
ttm_bo_util.c	drm/gem-vram: handle NULL bo->resource in move callback	2023-02-23 10:29:00 +01:00
ttm_bo_vm.c	- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of	2023-04-27 19:42:02 -07:00
ttm_device.c	Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-next	2023-06-15 14:11:22 +10:00
ttm_execbuf_util.c	drm/ttm: merge ttm_bo_api.h and ttm_bo_driver.h v2	2022-12-06 12:54:14 +01:00
ttm_module.c	LoongArch: Add writecombine support for drm	2022-06-03 20:09:27 +08:00
ttm_module.h	drm/ttm: add ttm_sys_manager v3	2021-05-03 12:50:41 +02:00
ttm_pool.c	Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-next	2023-06-15 14:11:22 +10:00
ttm_range_manager.c	drm/ttm: merge ttm_bo_api.h and ttm_bo_driver.h v2	2022-12-06 12:54:14 +01:00
ttm_resource.c	drm/ttm: fix warning that we shouldn't mix && and ||	2023-06-23 17:21:02 +02:00
ttm_sys_manager.c	drm/ttm: add back a reference to the bdev to the res manager	2022-01-26 15:29:24 +01:00
ttm_tt.c	Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-next	2023-06-15 14:11:22 +10:00