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block-6.14-20250214

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Merge tag 'block-6.14-20250214' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:

 - Fix for request rejection for batch addition

 - Fix a few issues for bogus mac partition tables

* tag 'block-6.14-20250214' of git://git.kernel.dk/linux:
  partitions: mac: fix handling of bogus partition table
  block: cleanup and fix batch completion adding conditions
This commit is contained in:
Linus Torvalds 2025-02-14 11:40:59 -08:00
commit 1b8c8cdad1
2 changed files with 29 additions and 7 deletions
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18
block/partitions/mac.c
View file

@ -53,13 +53,25 @@ int mac_partition(struct parsed_partitions *state)
}
secsize = be16_to_cpu(md->block_size);
put_dev_sector(sect);
/*
* If the "block size" is not a power of 2, things get weird - we might
* end up with a partition straddling a sector boundary, so we wouldn't
* be able to read a partition entry with read_part_sector().
* Real block sizes are probably (?) powers of two, so just require
* that.
*/
if (!is_power_of_2(secsize))
return -1;
datasize = round_down(secsize, 512);
data = read_part_sector(state, datasize / 512, &sect);
if (!data)
return -1;
partoffset = secsize % 512;
if (partoffset + sizeof(*part) > datasize)
if (partoffset + sizeof(*part) > datasize) {
put_dev_sector(sect);
return -1;
}
part = (struct mac_partition *) (data + partoffset);
if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
put_dev_sector(sect);
@ -112,8 +124,8 @@ int mac_partition(struct parsed_partitions *state)
int i, l;
goodness++;
l = strlen(part->name);
if (strcmp(part->name, "/") == 0)
l = strnlen(part->name, sizeof(part->name));
if (strncmp(part->name, "/", sizeof(part->name)) == 0)
goodness++;
for (i = 0; i <= l - 4; ++i) {
if (strncasecmp(part->name + i, "root",

18
include/linux/blk-mq.h
View file

@ -861,12 +861,22 @@ static inline bool blk_mq_add_to_batch(struct request *req,
void (*complete)(struct io_comp_batch *))
{
/*
* blk_mq_end_request_batch() can't end request allocated from
* sched tags
* Check various conditions that exclude batch processing:
* 1) No batch container
* 2) Has scheduler data attached
* 3) Not a passthrough request and end_io set
* 4) Not a passthrough request and an ioerror
*/
if (!iob || (req->rq_flags & RQF_SCHED_TAGS) || ioerror ||
(req->end_io && !blk_rq_is_passthrough(req)))
if (!iob)
return false;
if (req->rq_flags & RQF_SCHED_TAGS)
return false;
if (!blk_rq_is_passthrough(req)) {
if (req->end_io)
return false;
if (ioerror < 0)
return false;
}
if (!iob->complete)
iob->complete = complete;