Btrfs-progs: set string end sing '\0' for property

Set string "xattr_name" 's end with '\0' so that it won't be
violated in memory.

With this fix, xfstest/btrfs/048 can pass on my box.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Filipe Manana <fdmanana@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 2 insertions, 1 deletions

diff --git a/props.c b/props.c
index 04b9e5f1..9fd612f9 100644
--- a/props.c
+++ b/props.c
@@ -129,13 +129,14 @@ static int prop_compression(enum prop_object_type type,
 		goto out;
 	}
 
-	xattr_name = malloc(XATTR_BTRFS_PREFIX_LEN + strlen(name));
+	xattr_name = malloc(XATTR_BTRFS_PREFIX_LEN + strlen(name) + 1);
 	if (!xattr_name) {
 		ret = -ENOMEM;
 		goto out;
 	}
 	memcpy(xattr_name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN);
 	memcpy(xattr_name + XATTR_BTRFS_PREFIX_LEN, name, strlen(name));
+	xattr_name[XATTR_BTRFS_PREFIX_LEN + strlen(name)] = '\0';
 
 	if (value)
 		sret = fsetxattr(fd, xattr_name, value, strlen(value), 0);