==================================================================
BUG: KMSAN: uninit-value in lock_timer_base kernel/time/timer.c:939 [inline]
BUG: KMSAN: uninit-value in __mod_timer+0x430/0x2c40 kernel/time/timer.c:1010
CPU: 0 PID: 7463 Comm: blkid Not tainted 4.16.0+ #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 lock_timer_base kernel/time/timer.c:939 [inline]
 __mod_timer+0x430/0x2c40 kernel/time/timer.c:1010
 mod_timer+0x70/0x80 kernel/time/timer.c:1102
 can_stat_update+0x1704/0x1860 net/can/proc.c:179
 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x56d/0x93d 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:541
 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1055
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857
 </IRQ>
RIP: 0010:memset_erms+0xb/0x10 arch/x86/lib/memset_64.S:66
RSP: 0000:ffff880154cdf918 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff12
RAX: ffff880156f7f9ff RBX: ffff880154cdf9f5 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 00000000ffffffff RDI: ffff880156f7f9f6
RBP: ffff880154cdf9b8 R08: 0000000000000000 R09: ffff880156f7f9f5
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8aab5660 R14: 0000000000000001 R15: ffff88015cbc1d80
 page_add_file_rmap+0x58/0x6b0 mm/rmap.c:1178
 alloc_set_pte+0x8c6/0x1d80 mm/memory.c:3463
 filemap_map_pages+0x12d7/0x1ac0 mm/filemap.c:2680
 do_fault_around mm/memory.c:3609 [inline]
 do_read_fault mm/memory.c:3643 [inline]
 do_fault mm/memory.c:3748 [inline]
 handle_pte_fault mm/memory.c:3979 [inline]
 __handle_mm_fault mm/memory.c:4103 [inline]
 handle_mm_fault+0x44ba/0x7e50 mm/memory.c:4140
 __do_page_fault+0xec4/0x1a10 arch/x86/mm/fault.c:1423
 do_page_fault+0xd3/0x260 arch/x86/mm/fault.c:1500
 page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1151
RIP: 0033:0x7f985822cf84
RSP: 002b:00007ffd83821240 EFLAGS: 00010202
RAX: 00007f9857ffd848 RBX: 00007f98584424c8 RCX: 00007f985823a1d7
RDX: 00007f9858222e20 RSI: 0000000000000030 RDI: 00007f98584424c8
RBP: 00007ffd838213b0 R08: 0000000070000029 R09: 000000006ffffdff
R10: 000000006ffffeff R11: 0000000000000246 R12: 00007ffd83821498
R13: 000000006fffff48 R14: 00007ffd83821190 R15: 00007ffd83821130

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:293 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528
 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+0x21a6/0x2c40 kernel/time/timer.c:1055
 mod_timer+0x70/0x80 kernel/time/timer.c:1102
 can_stat_update+0x1704/0x1860 net/can/proc.c:179
 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x56d/0x93d kernel/softirq.c:285
Local variable description: ----heads@__run_timers
Variable was created at:
 __run_timers+0x84/0x11c0 kernel/time/timer.c:1651
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
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