vfs: allow O_PATH file descriptors for fstatfs()
authorLinus Torvalds <torvalds@linux-foundation.org>
Mon, 30 Sep 2013 15:35:10 +0000 (08:35 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 18 Oct 2013 14:45:44 +0000 (07:45 -0700)
commit670c0d101a57340aff4311c26a9ebb65b1d58f5a
tree99515f4c9e235e526e6a618e71bc23f94e768dbf
parentb7a52f5111bc53ffbfff96330621cbde80df6ba4
vfs: allow O_PATH file descriptors for fstatfs()

commit 9d05746e7b16d8565dddbe3200faa1e669d23bbf 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
55815f70147d ("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>
fs/statfs.c