dm-verity: fix a possible NULL pointer dereference

Fix a possible NULL pointer dereference dm_verity_loadpin_is_bdev_trusted
if the device has no table.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Assisted-by: Claude:claude-opus-4-6
Fixes: b6c1c5745ccc ("dm: Add verity helpers for LoadPin")
Cc: stable@vger.kernel.org

diff --git a/drivers/md/dm-verity-loadpin.c b/drivers/md/dm-verity-loadpin.c
index 0666699..9a64f57 100644 (file)
--- a/drivers/md/dm-verity-loadpin.c
+++ b/drivers/md/dm-verity-loadpin.c
@@ -70,7 +70,7 @@ bool dm_verity_loadpin_is_bdev_trusted(struct block_device *bdev)
 
        table = dm_get_live_table(md, &srcu_idx);
 
-       if (table->num_targets != 1)
+       if (!table || table->num_targets != 1)
                goto out;
 
        ti = dm_table_get_target(table, 0);