commit f549d6c18c0e ("[PATCH] Generic VFS fallback for security xattrs")
introduces a behavior change of listxattr path therefore listxattr(2)
won't report EOPNOTSUPP correctly if fs and security xattrs disabled.
However it was clearly recorded in manpage all the time.Cc: Alexander Viro <v...@zeniv.linux.org.uk> Cc: Stephen Smalley <s...@tycho.nsa.gov> Cc: Chengguang Xu <cgxu...@mykernel.net> Cc: Chao Yu <yuch...@huawei.com> Signed-off-by: Gao Xiang <hsiang...@redhat.com> --- Noticed when reviewing Chengguang's patch for erofs [1] (together with ext2, f2fs). I'm not sure if it's the best approach but it seems that security_inode_listsecurity() has other users and it mainly focus on reporting these security xattrs... [1] https://lore.kernel.org/r/20200526090343.22794-1-cgxu...@mykernel.net Thanks, Gao Xiang fs/xattr.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/fs/xattr.c b/fs/xattr.c index 91608d9bfc6a..f339a67db521 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -352,13 +352,15 @@ vfs_listxattr(struct dentry *dentry, char *list, size_t size) error = security_inode_listxattr(dentry); if (error) return error; - if (inode->i_op->listxattr && (inode->i_opflags & IOP_XATTR)) { - error = inode->i_op->listxattr(dentry, list, size); - } else { - error = security_inode_listsecurity(inode, list, size); - if (size && error > size) - error = -ERANGE; - } + + if (inode->i_op->listxattr && (inode->i_opflags & IOP_XATTR)) + return inode->i_op->listxattr(dentry, list, size); + + if (!IS_ENABLED(CONFIG_SECURITY)) + return -EOPNOTSUPP; + error = security_inode_listsecurity(inode, list, size); + if (size && error > size) + error = -ERANGE; return error; } EXPORT_SYMBOL_GPL(vfs_listxattr); -- 2.24.0
