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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-07 21:17:00 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-08 04:19:02 +0400 |
| commit | 332a2e1244bd08b9e3ecd378028513396a004a24 (patch) | |
| tree | 7524ffece22d3a7db3555d1df2e1d1d9370da9dd | |
| parent | cd6407fe220c5cf26c117457f5bcdfd6a81fbef8 (diff) | |
| download | linux-332a2e1244bd08b9e3ecd378028513396a004a24.tar.xz | |
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>
| -rw-r--r-- | fs/open.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/open.c b/fs/open.c index d6c79a0dffc7..1540632d8387 100644 --- a/fs/open.c +++ b/fs/open.c @@ -397,10 +397,10 @@ SYSCALL_DEFINE1(fchdir, unsigned int, fd) { struct file *file; struct inode *inode; - int error; + int error, fput_needed; error = -EBADF; - file = fget(fd); + file = fget_raw_light(fd, &fput_needed); if (!file) goto out; @@ -414,7 +414,7 @@ SYSCALL_DEFINE1(fchdir, unsigned int, fd) if (!error) set_fs_pwd(current->fs, &file->f_path); out_putf: - fput(file); + fput_light(file, fput_needed); out: return error; } |