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vfs: allow O_PATH file descriptors for fstatfs() 

commit 9d05746e7b upstream.

Olga reported that file descriptors opened with O_PATH do not work with
fstatfs(), found during further development of ksh93's thread support.

There is no reason to not allow O_PATH file descriptors here (fstatfs is
very much a path operation), so use "fdget_raw()".  See commit
55815f7014 ("vfs: make O_PATH file descriptors usable for 'fstat()'")
for a very similar issue reported for fstat() by the same team.

Reported-and-tested-by: ольга крыжановская <olga.kryzhanovska@gmail.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Torvalds 2013-09-30 08:35:10 -07:00 committed by Greg Kroah-Hartman
parent c2f2710012
commit 5187f535be
1 changed files with 1 additions and 1 deletions
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fs/statfs.c
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@ -87,7 +87,7 @@ int user_statfs(const char __user *pathname, struct kstatfs *st)
int fd_statfs(int fd, struct kstatfs *st)
{
struct file *file = fget(fd);
struct file *file = fget_raw(fd);
int error = -EBADF;
if (file) {
error = vfs_statfs(&file->f_path, st);