4.11-stable review patch. If anyone has any objections, please let me know.
------------------ From: David Howells <[email protected]> commit deccf497d804a4c5fca2dbfad2f104675a6f9102 upstream. stat/lstat/fstatat need to pass AT_NO_AUTOMOUNT to vfs_statx() as the pre-statx code didn't set LOOKUP_AUTOMOUNT, even though fstatat() accepted the AT_NO_AUTOMOUNT flag. Fixes: a528d35e8bfc ("statx: Add a system call to make enhanced file info available") Reported-by: Ian Kent <[email protected]> Signed-off-by: David Howells <[email protected]> Tested-by: Ian Kent <[email protected]> Signed-off-by: Al Viro <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- include/linux/fs.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2921,17 +2921,19 @@ extern int vfs_statx_fd(unsigned int, st static inline int vfs_stat(const char __user *filename, struct kstat *stat) { - return vfs_statx(AT_FDCWD, filename, 0, stat, STATX_BASIC_STATS); + return vfs_statx(AT_FDCWD, filename, AT_NO_AUTOMOUNT, + stat, STATX_BASIC_STATS); } static inline int vfs_lstat(const char __user *name, struct kstat *stat) { - return vfs_statx(AT_FDCWD, name, AT_SYMLINK_NOFOLLOW, + return vfs_statx(AT_FDCWD, name, AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT, stat, STATX_BASIC_STATS); } static inline int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat, int flags) { - return vfs_statx(dfd, filename, flags, stat, STATX_BASIC_STATS); + return vfs_statx(dfd, filename, flags | AT_NO_AUTOMOUNT, + stat, STATX_BASIC_STATS); } static inline int vfs_fstat(int fd, struct kstat *stat) {
