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fuse: fix time_to_jiffies nsec sanity check

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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>
This commit is contained in:
David Sheets 2017-01-13 15:58:30 +00:00 committed by Greg Kroah-Hartman
parent 0181b36036
commit 07f0267561
1 changed files with 1 additions and 1 deletions
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2
fs/fuse/dir.c
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@ -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);