* [dm-devel] [PATCH] dm-integrity: fix a crash with recalculate
@ 2021-01-20 11:02 Mikulas Patocka
0 siblings, 0 replies; only message in thread
From: Mikulas Patocka @ 2021-01-20 11:02 UTC (permalink / raw)
To: Mike Snitzer, Milan Broz; +Cc: dm-devel
Fix a crash if "recalculate" is specified without "internal_hash".
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org # v4.19+
Index: linux-2.6/drivers/md/dm-integrity.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-integrity.c
+++ linux-2.6/drivers/md/dm-integrity.c
@@ -4235,6 +4235,12 @@ try_smaller_buffer:
r = -ENOMEM;
goto bad;
}
+ } else {
+ if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) {
+ ti->error = "Recalculate can only be specified with internal_hash";
+ r = -EINVAL;
+ goto bad;
+ }
}
ic->bufio = dm_bufio_client_create(ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev,
--
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2021-01-20 11:02 [dm-devel] [PATCH] dm-integrity: fix a crash with recalculate Mikulas Patocka
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