Patch "path_openat(): fix double fput()" has been added to the 3.14-stable tree

Patch "path_openat(): fix double fput()" has been added to the 3.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    path_openat(): fix double fput()

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     path_openat-fix-double-fput.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f15133df088ecadd141ea1907f2c96df67c729f0 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 8 May 2015 22:53:15 -0400
Subject: path_openat(): fix double fput()

From: Al Viro <viro@zeniv.linux.org.uk>

commit f15133df088ecadd141ea1907f2c96df67c729f0 upstream.

path_openat() jumps to the wrong place after do_tmpfile() - it has
already done path_cleanup() (as part of path_lookupat() called by
do_tmpfile()), so doing that again can lead to double fput().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/namei.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3171,7 +3171,7 @@ static struct file *path_openat(int dfd,
 
 	if (unlikely(file->f_flags & __O_TMPFILE)) {
 		error = do_tmpfile(dfd, pathname, nd, flags, op, file, &opened);
-		goto out;
+		goto out2;
 	}
 
 	error = path_init(dfd, pathname->name, flags | LOOKUP_PARENT, nd, &base);
@@ -3209,6 +3209,7 @@ out:
 		path_put(&nd->root);
 	if (base)
 		fput(base);
+out2:
 	if (!(opened & FILE_OPENED)) {
 		BUG_ON(!error);
 		put_filp(file);


Patches currently in stable-queue which might be from viro@zeniv.linux.org.uk are

queue-3.14/new-helper-dentry_free.patch
queue-3.14/don-t-remove-from-shrink-list-in-select_collect.patch
queue-3.14/fold-try_prune_one_dentry.patch
queue-3.14/more-graceful-recovery-in-umount_collect.patch
queue-3.14/expand-the-call-of-dentry_lru_del-in-dentry_kill.patch
queue-3.14/dcache-don-t-need-rcu-in-shrink_dentry_list.patch
queue-3.14/path_openat-fix-double-fput.patch
queue-3.14/fold-d_kill-and-d_free.patch
queue-3.14/ipc-modify-message-queue-accounting-to-not-take-kernel-data-structures-into-account.patch
queue-3.14/dentry_kill-don-t-try-to-remove-from-shrink-list.patch
queue-3.14/sg_start_req-make-sure-that-there-s-not-too-many-elements-in-iovec.patch