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dm-integrity: fix a bug if the bio is out of limits

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If dm_integrity_check_limits fails, the code would exit with
DM_MAPIO_KILL. However, the range would be already locked at this point,
and it wouldn't be unlocked, resulting in a deadlock. Let's move the
limit check up, so that when it exits, no resources are leaked.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Assisted-by: Claude:claude-opus-4.6
Fixes: fb0987682c ("dm-integrity: introduce the Inline mode")
Cc: stable@vger.kernel.org
This commit is contained in:
Mikulas Patocka
2026-07-09 21:25:39 +02:00
parent edf025f083
commit 5a266764fa
1 changed files with 3 additions and 4 deletions
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7
drivers/md/dm-integrity.c
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@@ -2520,6 +2520,9 @@ static int dm_integrity_map_inline(struct dm_integrity_io *dio, bool from_map)
if (unlikely((bio->bi_opf & REQ_PREFLUSH) != 0))
return DM_MAPIO_REMAPPED;
if (unlikely(!dm_integrity_check_limits(ic, bio->bi_iter.bi_sector, bio)))
return DM_MAPIO_KILL;
retry:
if (!dio->integrity_payload) {
unsigned digest_size, extra_size;
@@ -2584,10 +2587,6 @@ static int dm_integrity_map_inline(struct dm_integrity_io *dio, bool from_map)
dio->bio_details.bi_iter = bio->bi_iter;
if (unlikely(!dm_integrity_check_limits(ic, bio->bi_iter.bi_sector, bio))) {
return DM_MAPIO_KILL;
}
bio->bi_iter.bi_sector += ic->start + SB_SECTORS;
bip = bio_integrity_alloc(bio, GFP_NOIO, 1);