Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
vfs: make O_PATH file descriptors usable for 'fchdir()'
We already use them for openat() and friends, but fchdir() also wants to
be able to use O_PATH file descriptors. This should make it comparable
to the O_SEARCH of Solaris. In particular, O_PATH allows you to access
(not-quite-open) a directory you don't have read persmission to, only
execute permission.
Noticed during development of multithread support for ksh93.
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>
+3
-3
+3
-3
fs/open.c
+3
-3
fs/open.c
···
397
397
{
398
398
struct file *file;
399
399
struct inode *inode;
400
-
int error;
400
+
int error, fput_needed;
401
401
402
402
error = -EBADF;
403
-
file = fget(fd);
403
+
file = fget_raw_light(fd, &fput_needed);
404
404
if (!file)
405
405
goto out;
406
406
···
414
414
if (!error)
415
415
set_fs_pwd(current->fs, &file->f_path);
416
416
out_putf:
417
-
fput(file);
417
+
fput_light(file, fput_needed);
418
418
out:
419
419
return error;
420
420
}