fuse: fix time_to_jiffies nsec sanity check

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>

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 096f799..642c57b 100644 (file)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -68,7 +68,7 @@ static u64 time_to_jiffies(u64 sec, u32 nsec)
        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);