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>
Tue, 22 Oct 2013 07:41:44 +0000 (08:41 +0100)
commit0ffc34c0d09a7d36ff84d1ac506a352a06ef5e4e
tree6bb5e763a314d5b7b8e0bf59b6210a6c49d3b773
parentfa759b5d100c8b0d2ec2b83fcac990f2c3ac13b7
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