Zeng Tao cb47755725 time: Prevent undefined behaviour in timespec64_to_ns() ... UBSAN reports: Undefined behaviour in ./include/linux/time64.h:127:27 signed integer overflow: 17179869187 * 1000000000 cannot be represented in type 'long long int' Call Trace: timespec64_to_ns include/linux/time64.h:127 [inline] set_cpu_itimer+0x65c/0x880 kernel/time/itimer.c:180 do_setitimer+0x8e/0x740 kernel/time/itimer.c:245 __x64_sys_setitimer+0x14c/0x2c0 kernel/time/itimer.c:336 do_syscall_64+0xa1/0x540 arch/x86/entry/common.c:295 Commit bd40a17576 ("y2038: itimer: change implementation to timespec64") replaced the original conversion which handled time clamping correctly with timespec64_to_ns() which has no overflow protection. Fix it in timespec64_to_ns() as this is not necessarily limited to the usage in itimers. [ tglx: Added comment and adjusted the fixes tag ] Fixes: 361a3bf005 ("time64: Add time64.h header and define struct timespec64") Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/1598952616-6416-1-git-send-email-prime.zeng@hisilicon.com		2020-10-26 11:48:11 +01:00
..
alarmtimer.c	alarmtimer: Convert comma to semicolon	2020-08-25 12:45:53 +02:00
clockevents.c
clocksource.c	clocksource: Remove obsolete ifdef	2020-06-09 16:36:47 +02:00
hrtimer.c	hrtimer: Remove unused inline function debug_hrtimer_free()	2020-10-26 11:39:21 +01:00
itimer.c	time: Prevent undefined behaviour in timespec64_to_ns()	2020-10-26 11:48:11 +01:00
jiffies.c
Kconfig	posix-cpu-timers: Provide mechanisms to defer timer handling to task_work	2020-08-06 16:50:59 +02:00
Makefile
namespace.c	nsproxy: support CLONE_NEWTIME with setns()	2020-07-08 11:14:22 +02:00
ntp_internal.h
ntp.c
posix-clock.c
posix-cpu-timers.c	posix-cpu-timers: Provide mechanisms to defer timer handling to task_work	2020-08-06 16:50:59 +02:00
posix-stubs.c
posix-timers.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
posix-timers.h
sched_clock.c	time/sched_clock: Mark sched_clock_read_begin/retry() as notrace	2020-10-26 11:34:31 +01:00
test_udelay.c
tick-broadcast-hrtimer.c
tick-broadcast.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
tick-common.c
tick-internal.h
tick-oneshot.c
tick-sched.c	tick-sched: Clarify "NOHZ: local_softirq_pending" warning	2020-08-24 18:38:32 -07:00
tick-sched.h
time.c
timeconst.bc
timeconv.c
timecounter.c
timekeeping_debug.c
timekeeping_internal.h	timekeeping/vsyscall: Provide vdso_update_begin/end()	2020-08-06 10:57:30 +02:00
timekeeping.c	These are the locking updates for v5.10:	2020-10-12 13:06:20 -07:00
timekeeping.h
timer_list.c
timer.c	timers: Remove unused inline funtion debug_timer_free()	2020-10-26 11:39:21 +01:00
vsyscall.c	timekeeping/vsyscall: Provide vdso_update_begin/end()	2020-08-06 10:57:30 +02:00