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dm-verity: correctly handle dm_bufio_client_create() failure

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If either of the calls to dm_bufio_client_create() in verity_fec_ctr()
fails, then dm_bufio_client_destroy() is later called with an ERR_PTR()
argument.  That causes a crash.  Fix this.

Fixes: a739ff3f54 ("dm verity: add support for forward error correction")
Cc: stable@vger.kernel.org
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Eric Biggers 2025-12-19 11:29:08 -08:00 • committed by Mikulas Patocka
parent 1a257c5fd3
commit 119f4f0418
1 changed files with 2 additions and 2 deletions
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4
drivers/md/dm-verity-fec.c
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@ -501,9 +501,9 @@ void verity_fec_dtr(struct dm_verity *v)
mempool_exit(&f->output_pool);
kmem_cache_destroy(f->cache);
if (f->data_bufio)
if (!IS_ERR_OR_NULL(f->data_bufio))
dm_bufio_client_destroy(f->data_bufio);
if (f->bufio)
if (!IS_ERR_OR_NULL(f->bufio))
dm_bufio_client_destroy(f->bufio);
if (f->dev)