From: John Crispin <john@phrozen.org>
Date: Mon, 22 Jan 2018 06:22:40 +0000 (+0100)
Subject: fix vfat volume label
X-Git-Url: http://git.openwrt.org/?p=project%2Ffstools.git;a=commitdiff_plain;h=c4a3c9785e9e554f5b89dd95c3071bd4f30cbdbc

fix vfat volume label

the libblkid copies len+1 bytes causing a buffer overrun.

Signed-off-by: John Crispin <john@phrozen.org>
---

diff --git a/libblkid-tiny/vfat.c b/libblkid-tiny/vfat.c
index e3daf75..9f3d395 100644
--- a/libblkid-tiny/vfat.c
+++ b/libblkid-tiny/vfat.c
@@ -303,7 +303,7 @@ static int probe_vfat(blkid_probe pr, const struct blkid_idmag *mag)
 	struct vfat_super_block *vs;
 	struct msdos_super_block *ms;
 	const unsigned char *vol_label = 0;
-	unsigned char *vol_serno = NULL, vol_label_buf[11];
+	unsigned char *vol_serno = NULL, vol_label_buf[12] = { 0 };
 	uint16_t sector_size = 0, reserved;
 	uint32_t cluster_count, fat_size;
 	const char *version = NULL;