==================================================================
BUG: KMSAN: uninit-value in lock_timer_base kernel/time/timer.c:939 [inline]
BUG: KMSAN: uninit-value in __mod_timer+0x42d/0x2bf0 kernel/time/timer.c:1010
CPU: 0 PID: 14951 Comm: udevd Not tainted 4.17.0+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1122
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
 lock_timer_base kernel/time/timer.c:939 [inline]
 __mod_timer+0x42d/0x2bf0 kernel/time/timer.c:1010
 mod_timer+0x70/0x80 kernel/time/timer.c:1102
 can_stat_update+0x15ec/0x1860 net/can/proc.c:179
 call_timer_fn+0x280/0x5d0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xd96/0x11b0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x592/0x979 kernel/softirq.c:285
 invoke_softirq kernel/softirq.c:365 [inline]
 irq_exit+0x202/0x240 kernel/softirq.c:405
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:525
 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1055
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
 </IRQ>
RIP: 0010:__msan_poison_alloca+0xd7/0x1d0 mm/kmsan/kmsan_instr.c:580
RSP: 0000:ffff88015fd4fd20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 00004110c4071900 RBX: ffff88015fd4fdd8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 00000000ffffffff RDI: ffff88015fd6fdd8
RBP: ffff88015fd4fdc0 R08: 00000000aa40006e R09: ffff88015fd6fdd7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8ac7dde0 R14: 0000000000000001 R15: ffff88011d249d40
 should_resched arch/x86/include/asm/preempt.h:97 [inline]
 _cond_resched+0x2b/0xd0 kernel/sched/core.c:4998
 __do_page_fault+0x808/0x1a10 arch/x86/mm/fault.c:1343
 do_page_fault+0xb7/0x250 arch/x86/mm/fault.c:1477
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1160
RIP: 0033:0x7f5144a42fa9
RSP: 002b:00007ffc6e5a4150 EFLAGS: 00010202
RAX: 00000000511945c7 RBX: 00007ffc6e5a4150 RCX: 00007f5144a42f46
RDX: 00000078511945c7 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc6e5a41b0 R08: 0000000000001e93 R09: 0000000000001e93
R10: 00007f514535fa70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc6e5a4170 R14: 00007f514536a040 R15: 0000000000000005

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:294 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:686
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464
 timer_set_idx kernel/time/timer.c:480 [inline]
 enqueue_timer kernel/time/timer.c:539 [inline]
 __internal_add_timer kernel/time/timer.c:548 [inline]
 internal_add_timer kernel/time/timer.c:590 [inline]
 __mod_timer+0x22a1/0x2bf0 kernel/time/timer.c:1055
 mod_timer+0x70/0x80 kernel/time/timer.c:1102
 can_stat_update+0x15ec/0x1860 net/can/proc.c:179
 call_timer_fn+0x280/0x5d0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xd96/0x11b0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x592/0x979 kernel/softirq.c:285

Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave
Variable was created at:
 _raw_spin_lock_irqsave+0x45/0xf0 kernel/locking/spinlock.c:150
 lock_timer_base kernel/time/timer.c:938 [inline]
 __mod_timer+0x368/0x2bf0 kernel/time/timer.c:1010
==================================================================