diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_attr.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_attr.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c index ba59dab6c56d..629fb25d149c 100644 --- a/fs/xfs/libxfs/xfs_attr.c +++ b/fs/xfs/libxfs/xfs_attr.c @@ -1532,12 +1532,23 @@ out_release: return error; } +/* Enforce that there is at most one namespace bit per attr. */ +inline bool xfs_attr_check_namespace(unsigned int attr_flags) +{ + return hweight32(attr_flags & XFS_ATTR_NSP_ONDISK_MASK) < 2; +} + /* Returns true if the attribute entry name is valid. */ bool xfs_attr_namecheck( + unsigned int attr_flags, const void *name, size_t length) { + /* Only one namespace bit allowed. */ + if (!xfs_attr_check_namespace(attr_flags)) + return false; + /* * MAXNAMELEN includes the trailing null, but (name/length) leave it * out, so use >= for the length check. |