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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2015-12-02 14:44:36 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-12-06 21:33:52 -0500 |
| commit | 98e9cb5711c68223f0e4d5201b9a6add255ec550 (patch) | |
| tree | 12fee55d296fc85a6e8188368ca4944fc4d913a8 /fs/posix_acl.c | |
| parent | 97d79299223baab330b194437e676d301f12d5f6 (diff) | |
| download | linux-stable-98e9cb5711c68223f0e4d5201b9a6add255ec550.tar.gz linux-stable-98e9cb5711c68223f0e4d5201b9a6add255ec550.tar.bz2 linux-stable-98e9cb5711c68223f0e4d5201b9a6add255ec550.zip | |
vfs: Distinguish between full xattr names and proper prefixes
Add an additional "name" field to struct xattr_handler. When the name
is set, the handler matches attributes with exactly that name. When the
prefix is set instead, the handler matches attributes with the given
prefix and with a non-empty suffix.
This patch should avoid bugs like the one fixed in commit c361016a in
the future.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/posix_acl.c')
| -rw-r--r-- | fs/posix_acl.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 571465d6df58..17efd76978c8 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -769,8 +769,6 @@ posix_acl_xattr_get(const struct xattr_handler *handler, 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)) @@ -797,8 +795,6 @@ posix_acl_xattr_set(const struct xattr_handler *handler, 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) @@ -832,7 +828,7 @@ posix_acl_xattr_list(const struct xattr_handler *handler, struct dentry *dentry, char *list, size_t list_size, const char *name, size_t name_len) { - const char *xname = handler->prefix; + const char *xname = handler->name; size_t size; if (!IS_POSIXACL(d_backing_inode(dentry))) @@ -845,7 +841,7 @@ posix_acl_xattr_list(const struct xattr_handler *handler, } const struct xattr_handler posix_acl_access_xattr_handler = { - .prefix = XATTR_NAME_POSIX_ACL_ACCESS, + .name = XATTR_NAME_POSIX_ACL_ACCESS, .flags = ACL_TYPE_ACCESS, .list = posix_acl_xattr_list, .get = posix_acl_xattr_get, @@ -854,7 +850,7 @@ const struct xattr_handler posix_acl_access_xattr_handler = { EXPORT_SYMBOL_GPL(posix_acl_access_xattr_handler); const struct xattr_handler posix_acl_default_xattr_handler = { - .prefix = XATTR_NAME_POSIX_ACL_DEFAULT, + .name = XATTR_NAME_POSIX_ACL_DEFAULT, .flags = ACL_TYPE_DEFAULT, .list = posix_acl_xattr_list, .get = posix_acl_xattr_get, |