From c372e1bedc0a7aba422c0a299ca32dff8156ab3c Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Thu, 2 Jun 2022 16:02:54 +0200 Subject: [PATCH] libblkid: (mac) make sure block size is large enough [fuzzing] Reported-by: Thibault Guittet Signed-off-by: Karel Zak --- libblkid/src/partitions/mac.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libblkid/src/partitions/mac.c b/libblkid/src/partitions/mac.c index 092d31d322..75a558b0a3 100644 --- a/libblkid/src/partitions/mac.c +++ b/libblkid/src/partitions/mac.c @@ -93,6 +93,8 @@ static int probe_mac_pt(blkid_probe pr, } block_size = be16_to_cpu(md->block_size); + if (block_size < sizeof(struct mac_partition)) + goto nothing; /* The partition map always begins at physical block 1, * the second block on the disk. -- 2.47.2