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

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 <[email protected]>
Assisted-by: Claude:claude-opus-4.6
Fixes: fb0987682c62 ("dm-integrity: introduce the Inline mode")
Cc: [email protected]

---
 drivers/md/dm-integrity.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

Index: linux-2.6/drivers/md/dm-integrity.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-integrity.c	2026-06-29 17:58:18.000000000 +0200
+++ linux-2.6/drivers/md/dm-integrity.c	2026-06-29 17:58:18.000000000 +0200
@@ -2520,6 +2520,9 @@ static int dm_integrity_map_inline(struc
 	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 @@ skip_spinlock:
 
 	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);