From a696cf3529cecd261d6534fec242e39177b57e19 Mon Sep 17 00:00:00 2001 From: Filipe David Borba Manana Date: Wed, 14 Aug 2013 03:00:20 +0100 Subject: [PATCH] Btrfs: add missing error code to BTRFS_IOC_INO_LOOKUP handler If the path doesn't fit in the input buffer, return ENAMETOOLONG instead of returning with a success code (0) and a partially filled and right justified buffer. Also removed useless buffer pointer check outside the while loop. Signed-off-by: Filipe David Borba Manana Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/ioctl.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 317a984fe3c9..f88eeea365f3 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2030,8 +2030,10 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info, len = btrfs_inode_ref_name_len(l, iref); ptr -= len + 1; total_len += len + 1; - if (ptr < name) + if (ptr < name) { + ret = -ENAMETOOLONG; goto out; + } *(ptr + len) = '/'; read_extent_buffer(l, ptr,(unsigned long)(iref + 1), len); @@ -2044,8 +2046,6 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info, key.offset = (u64)-1; dirid = key.objectid; } - if (ptr < name) - goto out; memmove(name, ptr, total_len); name[total_len]='\0'; ret = 0; -- 2.39.5