From: Karel Zak <kzak@redhat.com>
Date: Wed, 15 Apr 2026 13:42:40 +0000 (+0200)
Subject: libblkid: bcache: add missing NULL check
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=b962c2e18346e6085a95e6b50aa1fceccc516459;p=thirdparty%2Futil-linux.git

libblkid: bcache: add missing NULL check

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/libblkid/src/superblocks/bcache.c b/libblkid/src/superblocks/bcache.c
index 08be01363..f9e0a9908 100644
--- a/libblkid/src/superblocks/bcache.c
+++ b/libblkid/src/superblocks/bcache.c
@@ -216,6 +216,8 @@ static int bcache_verify_checksum(blkid_probe pr, const struct blkid_idmag *mag,
 	csummed_size = offsetof(__typeof__(*bcs), d) +
 		sizeof(bcs->d[0]) * le16_to_cpu(bcs->keys);
 	csummed = blkid_probe_get_sb_buffer(pr, mag, csummed_size);
+	if (!csummed)
+		return 0;
 	csum = ul_crc64_we(csummed + BCACHE_SB_CSUMMED_START,
 			   csummed_size - BCACHE_SB_CSUMMED_START);
 	return blkid_probe_verify_csum(pr, csum, le64_to_cpu(bcs->csum));