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 e3daf75b2c2edd692d49f8b279c5805d006a3885..9f3d39551e016dffd14289c136c5469d8f715459 100644 (file)
--- 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;