vfs: make O_PATH file descriptors usable for 'fstat()'

rubenslte/android_kernel_samsung_msm8226-rubenslte

forked from rubenslte/android_kernel_samsung_msm8226

We already use them for openat() and friends, but fstat() also wants to
be able to use O_PATH file descriptors.  This should make it more
directly comparable to the O_SEARCH of Solaris.

Note that you could already do the same thing with "fstatat()" and an
empty path, but just doing "fstat()" directly is simpler and faster, so
there is no reason not to just allow it directly.

See also commit 332a2e1244bd, which did the same thing for fchdir, for
the same reasons.

Reported-by: ольга крыжановская <olga.kryzhanovska@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org    # O_PATH introduced in 3.0+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: I98db77b7f3fcadb1f0ecdb5c50ff4a7ad9db8bb3

This commit is contained in:

Linus Torvalds

2020-11-18 08:55:13 +01:00

committed by

Francescodario Cuzzocrea

parent ee698220f2

commit 014515fc3a

1 changed files with 1 additions and 1 deletions

									
										fs/stat.c
									
		+1
		-1
	
												View File
												
				@@ -58,7 +58,7 @@ EXPORT_SYMBOL(vfs_getattr);

				int vfs_fstat(unsigned int fd, struct kstat *stat)

				{

					int fput_needed;

					struct file *f = fget_light(fd, &fput_needed);

					struct file *f = fget_raw_light(fd, &fput_needed);

					int error = -EBADF;

					if (f) {