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iomap: don't free integrity payload that doesn't exist

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fs_bio_integrity_alloc might not allocate a bio integrity payload if PI
verification is disabled on the block device.  Check for that case before
calling fs_bio_integrity_free in iomap_bio_read_folio_range_sync to
avoid a NULL pointer dereferences.

Make the branch cover the PI verification as well - while
fs_bio_integrity_verify works without an integrity payload, it requires
one to actually do useful work.

Fixes: 0b10a37052 ("iomap: support T10 protection information")
Cc: stable@vger.kernel.org # v7.1
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Link: https://patch.msgid.link/20260804124404.737145-2-hch@lst.de
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Christoph Hellwig 2026-08-04 05:43:57 -07:00 committed by Christian Brauner
parent 7c7fe554f4
commit 8a8685b32c
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1 changed files with 1 additions and 1 deletions
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2
fs/iomap/bio.c
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@ -170,7 +170,7 @@ int iomap_bio_read_folio_range_sync(const struct iomap_iter *iter,
if (srcmap->flags & IOMAP_F_INTEGRITY)
fs_bio_integrity_alloc(&bio);
error = submit_bio_wait(&bio);
if (srcmap->flags & IOMAP_F_INTEGRITY) {
if (bio_integrity(&bio)) {
if (!error)
error = fs_bio_integrity_verify(&bio, sector, len);
fs_bio_integrity_free(&bio);