From: David Howells Date: Thu, 4 May 2017 22:30:16 +0000 (+0100) Subject: Make stat/lstat/fstatat pass AT_NO_AUTOMOUNT to vfs_statx() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=deccf497d804a4c5fca2dbfad2f104675a6f9102;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git Make stat/lstat/fstatat pass AT_NO_AUTOMOUNT to vfs_statx() 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 Signed-off-by: David Howells Tested-by: Ian Kent cc: stable@vger.kernel.org Signed-off-by: Al Viro --- diff --git a/include/linux/fs.h b/include/linux/fs.h index fc1b4faa6272..866c955314db 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2920,17 +2920,19 @@ extern int vfs_statx_fd(unsigned int, struct kstat *, u32, unsigned int); 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) {