Patch "fuse: fix time_to_jiffies nsec sanity check" has been added to the 4.9-stable tree

Patch "fuse: fix time_to_jiffies nsec sanity check" has been added to the 4.9-stable tree

[gregkh]

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

    fuse: fix time_to_jiffies nsec sanity check

to the 4.9-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:
     fuse-fix-time_to_jiffies-nsec-sanity-check.patch
and it can be found in the queue-4.9 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 210675270caa33253e4c33f3c5e657e7d6060812 Mon Sep 17 00:00:00 2001
From: David Sheets <david.sheets@docker.com>
Date: Fri, 13 Jan 2017 15:58:30 +0000
Subject: fuse: fix time_to_jiffies nsec sanity check

From: David Sheets <david.sheets@docker.com>

commit 210675270caa33253e4c33f3c5e657e7d6060812 upstream.

Commit bcb6f6d2b9c2 ("fuse: use timespec64") introduced clamped nsec values
in time_to_jiffies but used the max of nsec and NSEC_PER_SEC - 1 instead of
the min. Because of this, dentries would stay in the cache longer than
requested and go stale in scenarios that relied on their timely eviction.

Fixes: bcb6f6d2b9c2 ("fuse: use timespec64")
Signed-off-by: David Sheets <dsheets@docker.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/fuse/dir.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -68,7 +68,7 @@ static u64 time_to_jiffies(u64 sec, u32
 	if (sec || nsec) {
 		struct timespec64 ts = {
 			sec,
-			max_t(u32, nsec, NSEC_PER_SEC - 1)
+			min_t(u32, nsec, NSEC_PER_SEC - 1)
 		};
 
 		return get_jiffies_64() + timespec64_to_jiffies(&ts);


Patches currently in stable-queue which might be from david.sheets@docker.com are

queue-4.9/fuse-fix-time_to_jiffies-nsec-sanity-check.patch