From: Yuyao Lin <linyuyao1@huawei.com> hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I61XP8 CVE: NA -------------------------------- This reverts commit 098b0e01a91c42aaaf0425605cd126b03fcb0bcf. Function timespec64_to_ns() Add the upper and lower limits check in commit c0b527413194 ("time: Prevent undefined behaviour in timespec64_to_ns()"), timespec64_to_ktime() only check the upper limits, so revert this patch can fix overflow. Signed-off-by: Yuyao Lin <linyuyao1@huawei.com> Reviewed-by: Wei Li <liwei391@huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com> --- kernel/time/posix-cpu-timers.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index bfaa44a80c03..5ea7ccfb62b8 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -584,11 +584,7 @@ static int posix_cpu_timer_set(struct k_itimer *timer, int timer_flags, if (WARN_ON_ONCE(!p)) return -EINVAL; - /* - * Use the to_ktime conversion because that clamps the maximum - * value to KTIME_MAX and avoid multiplication overflows. - */ - new_expires = ktime_to_ns(timespec64_to_ktime(new->it_value)); + new_expires = timespec64_to_ns(&new->it_value); /* * Protect against sighand release/switch in exit/exec and p->cpu_timers -- 2.25.1