linux-kernel - [tip: timers/urgent] sys/sysinfo: Respect boottime inside time namespace

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Message-ID: <158326083954.28353.16922158200341050554.tip-bot2@tip-bot2>
Date:   Tue, 03 Mar 2020 18:40:39 -0000
From:   "tip-bot2 for Cyril Hrubis" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Cyril Hrubis <chrubis@...e.cz>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dmitry Safonov <dima@...sta.com>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: timers/urgent] sys/sysinfo: Respect boottime inside time namespace

The following commit has been merged into the timers/urgent branch of tip:

Commit-ID:     ecc421e05bab97cf3ff4fe456ade47ef84dba8c2
Gitweb:        https://git.kernel.org/tip/ecc421e05bab97cf3ff4fe456ade47ef84dba8c2
Author:        Cyril Hrubis <chrubis@...e.cz>
AuthorDate:    Tue, 03 Mar 2020 16:06:38 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Tue, 03 Mar 2020 19:34:32 +01:00

sys/sysinfo: Respect boottime inside time namespace

The sysinfo() syscall includes uptime in seconds but has no correction for
time namespaces which makes it inconsistent with the /proc/uptime inside of
a time namespace.

Add the missing time namespace adjustment call.

Signed-off-by: Cyril Hrubis <chrubis@...e.cz>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Dmitry Safonov <dima@...sta.com>
Link: https://lkml.kernel.org/r/20200303150638.7329-1-chrubis@suse.cz

---
 kernel/sys.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/sys.c b/kernel/sys.c
index f9bc5c3..d325f3a 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -47,6 +47,7 @@
 #include <linux/syscalls.h>
 #include <linux/kprobes.h>
 #include <linux/user_namespace.h>
+#include <linux/time_namespace.h>
 #include <linux/binfmts.h>
 
 #include <linux/sched.h>
@@ -2546,6 +2547,7 @@ static int do_sysinfo(struct sysinfo *info)
 	memset(info, 0, sizeof(struct sysinfo));
 
 	ktime_get_boottime_ts64(&tp);
+	timens_add_boottime(&tp);
 	info->uptime = tp.tv_sec + (tp.tv_nsec ? 1 : 0);
 
 	get_avenrun(info->loads, 0, SI_LOAD_SHIFT - FSHIFT);