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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 <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Filipe David Borba Manana 2013-08-14 03:00:20 +01:00 committed by Chris Mason
parent b006b2e4f9
commit a696cf3529
1 changed files with 3 additions and 3 deletions
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6
fs/btrfs/ioctl.c
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@ -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); len = btrfs_inode_ref_name_len(l, iref);
ptr -= len + 1; ptr -= len + 1;
total_len += len + 1; total_len += len + 1;
if (ptr < name) if (ptr < name) {
ret = -ENAMETOOLONG;
goto out; goto out;
}
*(ptr + len) = '/'; *(ptr + len) = '/';
read_extent_buffer(l, ptr,(unsigned long)(iref + 1), 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; key.offset = (u64)-1;
dirid = key.objectid; dirid = key.objectid;
} }
if (ptr < name)
goto out;
memmove(name, ptr, total_len); memmove(name, ptr, total_len);
name[total_len]='\0'; name[total_len]='\0';
ret = 0; ret = 0;