diff options
| author | John Stultz <john.stultz@linaro.org> | 2016-04-14 10:25:14 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-15 08:27:47 +0200 |
| commit | 1db396648ca33eb92dd0ed5cc2ea2f58816eeb9a (patch) | |
| tree | 5bb835e0941b8d2dc1e0da583c80cf2ec4496b93 /kernel | |
| parent | e79e7333c3a3d94a2b4f10f4977b45162ef160cf (diff) | |
ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO
[ Upstream commit dd4e17ab704269bce71402285f5e8b9ac24b1eff ]
Recently, in commit 37cf4dc3370f I forgot to check if the timeval being passed
was actually a timespec (as is signaled with ADJ_NANO).
This resulted in that patch breaking ADJ_SETOFFSET users who set
ADJ_NANO, by rejecting valid timespecs that were compared with
valid timeval ranges.
This patch addresses this by checking for the ADJ_NANO flag and
using the timepsec check instead in that case.
Reported-by: Harald Hoyer <harald@redhat.com>
Reported-by: Kay Sievers <kay@vrfy.org>
Fixes: 37cf4dc3370f "time: Verify time values in adjtimex ADJ_SETOFFSET to avoid overflow"
Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: David Herrmann <dh.herrmann@gmail.com>
Link: http://lkml.kernel.org/r/1453417415-19110-2-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/ntp.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index d7654e2f902c..ab861771e37f 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -679,8 +679,18 @@ int ntp_validate_timex(struct timex *txc) if (!capable(CAP_SYS_TIME)) return -EPERM; - if (!timeval_inject_offset_valid(&txc->time)) - return -EINVAL; + if (txc->modes & ADJ_NANO) { + struct timespec ts; + + ts.tv_sec = txc->time.tv_sec; + ts.tv_nsec = txc->time.tv_usec; + if (!timespec_inject_offset_valid(&ts)) + return -EINVAL; + + } else { + if (!timeval_inject_offset_valid(&txc->time)) + return -EINVAL; + } } /* |