From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Mon, 14 Nov 2022 03:19:34 +0000 (+0100)
Subject: libblkid: f2fs: fix unaligned access
X-Git-Tag: v2.39-rc1~427^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e6a540416cc9bc696f5d764c481506feda4f62b4;p=thirdparty%2Futil-linux.git

libblkid: f2fs: fix unaligned access
---

diff --git a/libblkid/src/superblocks/f2fs.c b/libblkid/src/superblocks/f2fs.c
index 3a2924d910..ce796098ae 100644
--- a/libblkid/src/superblocks/f2fs.c
+++ b/libblkid/src/superblocks/f2fs.c
@@ -62,6 +62,8 @@ static int f2fs_validate_checksum(blkid_probe pr, size_t sb_off,
 	uint32_t csum_off = le32_to_cpu(sb->checksum_offset);
 	if (!csum_off)
 		return 1;
+	if (csum_off % sizeof(uint32_t) != 0)
+		return 0;
 	if (csum_off + sizeof(uint32_t) > 4096)
 		return 0;