==================================================================
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: 10961 Comm: udevd Not tainted 4.17.0+ #9
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:1125
 __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:866
 </IRQ>
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:78 [inline]
RIP: 0010:__msan_get_context_state+0x93/0xf0 mm/kmsan/kmsan_instr.c:644
RSP: 0018:ffff880088a8f1e0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: ffff88014bfd4358 RBX: ffff88014bfd4358 RCX: 0000000000000000
RDX: ffff8801db9542f0 RSI: aaaaaaaaaaaab000 RDI: ffffea000cbcb140
RBP: ffff880088a8f208 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea000cbcb140 R14: ffff88014bfd3a80 R15: 0000000000000202
 PageHuge+0x19/0x1a0 mm/hugetlb.c:1337
 page_remove_file_rmap mm/rmap.c:1217 [inline]
 page_remove_rmap+0x1d7/0xe40 mm/rmap.c:1299
 zap_pte_range mm/memory.c:1338 [inline]
 zap_pmd_range mm/memory.c:1442 [inline]
 zap_pud_range mm/memory.c:1471 [inline]
 zap_p4d_range mm/memory.c:1492 [inline]
 unmap_page_range+0x1db1/0x3be0 mm/memory.c:1513
 unmap_single_vma+0x445/0x5e0 mm/memory.c:1558
 unmap_vmas+0x1f4/0x360 mm/memory.c:1588
 exit_mmap+0x4d7/0x980 mm/mmap.c:3105
 __mmput+0x158/0x600 kernel/fork.c:962
 mmput+0xab/0xf0 kernel/fork.c:983
 exec_mmap fs/exec.c:1044 [inline]
 flush_old_exec+0x1ace/0x2150 fs/exec.c:1276
 load_elf_binary+0x139f/0x8fe0 fs/binfmt_elf.c:869
 search_binary_handler+0x2f4/0xac0 fs/exec.c:1653
 exec_binprm fs/exec.c:1695 [inline]
 do_execveat_common+0x22e4/0x2db0 fs/exec.c:1817
 do_execve fs/exec.c:1862 [inline]
 __do_sys_execve fs/exec.c:1943 [inline]
 __se_sys_execve fs/exec.c:1938 [inline]
 __x64_sys_execve+0x127/0x180 fs/exec.c:1938
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f9e5523e207
RSP: 002b:00007fff88dfd7c8 EFLAGS: 00000202 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f9e5523e207
RDX: 0000000001b7e800 RSI: 00007fff88dfd8c0 RDI: 00007fff88dfe8d0
RBP: 0000000000625500 R08: 0000000000006f68 R09: 0000000000006f68
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000001b7e800
R13: 0000000000000007 R14: 0000000001b6d250 R15: 0000000000000005

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:297 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689
 __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
==================================================================