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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2015-11-03 17:25:07 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-11-14 04:34:28 +0300 |
| commit | c361016adeb5acb17a67000689602b7515930f13 (patch) | |
| tree | c7010c5e0a6a96904d163e7a6549ccf3e6def8ff | |
| parent | 7c7afc440c8ec311ae135df892cc489436a1ff00 (diff) | |
| download | linux-c361016adeb5acb17a67000689602b7515930f13.tar.xz | |
vfs: Check attribute names in posix acl xattr handers
The get and set operations of the POSIX ACL xattr handlers failed to check
the attribute names, so all names with "system.posix_acl_access" or
"system.posix_acl_default" as a prefix were accepted. Reject invalid names
from now on.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/posix_acl.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 4fb17ded7d47..b1a66e844d35 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -768,6 +768,8 @@ posix_acl_xattr_get(struct dentry *dentry, const char *name, struct posix_acl *acl; int error; + if (strcmp(name, "") != 0) + return -EINVAL; if (!IS_POSIXACL(d_backing_inode(dentry))) return -EOPNOTSUPP; if (d_is_symlink(dentry)) @@ -793,6 +795,8 @@ posix_acl_xattr_set(struct dentry *dentry, const char *name, struct posix_acl *acl = NULL; int ret; + if (strcmp(name, "") != 0) + return -EINVAL; if (!IS_POSIXACL(inode)) return -EOPNOTSUPP; if (!inode->i_op->set_acl) |