lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 14 Jan 2020 13:02:18 -0000 From: "tip-bot2 for Andrei Vagin" <tip-bot2@...utronix.de> To: linux-tip-commits@...r.kernel.org Cc: Andrei Vagin <avagin@...nvz.org>, Dmitry Safonov <dima@...sta.com>, Thomas Gleixner <tglx@...utronix.de>, x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org> Subject: [tip: timers/core] posix-timers: Make timer_settime() time namespace aware The following commit has been merged into the timers/core branch of tip: Commit-ID: 7da8b3a44bb426a43670b3a97ed61085018a9d43 Gitweb: https://git.kernel.org/tip/7da8b3a44bb426a43670b3a97ed61085018a9d43 Author: Andrei Vagin <avagin@...il.com> AuthorDate: Tue, 12 Nov 2019 01:27:03 Committer: Thomas Gleixner <tglx@...utronix.de> CommitterDate: Tue, 14 Jan 2020 12:20:54 +01:00 posix-timers: Make timer_settime() time namespace aware Wire timer_settime() syscall into time namespace virtualization. sys_timer_settime() calls the ktime->timer_set() callback. Right now, common_timer_set() is the only implementation for the callback. The user-supplied expiry value is converted from timespec64 to ktime and then timens_ktime_to_host() can be used to convert namespace's time to the host time. Inside a time namespace kernel's time differs by a fixed offset from a user-supplied time, but only absolute values (TIMER_ABSTIME) must be converted. Co-developed-by: Dmitry Safonov <dima@...sta.com> Signed-off-by: Andrei Vagin <avagin@...nvz.org> Signed-off-by: Dmitry Safonov <dima@...sta.com> Signed-off-by: Thomas Gleixner <tglx@...utronix.de> Link: https://lore.kernel.org/r/20191112012724.250792-15-dima@arista.com --- kernel/time/posix-timers.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index d26b915..473082b 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -885,6 +885,8 @@ int common_timer_set(struct k_itimer *timr, int flags, timr->it_interval = timespec64_to_ktime(new_setting->it_interval); expires = timespec64_to_ktime(new_setting->it_value); + if (flags & TIMER_ABSTIME) + expires = timens_ktime_to_host(timr->it_clock, expires); sigev_none = timr->it_sigev_notify == SIGEV_NONE; kc->timer_arm(timr, expires, flags & TIMER_ABSTIME, sigev_none);
Powered by blists - more mailing lists