==================================================================
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: 1 PID: 12183 Comm: blkid 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:kmsan_set_origin_inline+0xd/0x120 mm/kmsan/kmsan_instr.c:511
RSP: 0018:ffff8801445ef0e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000086000000 RBX: 0000000086000000 RCX: ffff8801445ef160
RDX: 0000000086000000 RSI: 0000000000000008 RDI: ffff8801445ef2b0
RBP: ffff8801445ef110 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff8acad080 R14: 0000000000000246 R15: ffff8800acf20000
 __msan_poison_alloca+0x15c/0x1d0 mm/kmsan/kmsan_instr.c:590
 __alloc_pages_nodemask+0x88/0x5cc0 mm/page_alloc.c:4357
 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093
 alloc_pages include/linux/gfp.h:494 [inline]
 pte_alloc_one+0x56/0x100 arch/x86/mm/pgtable.c:30
 __pte_alloc+0x86/0x410 mm/memory.c:655
 move_page_tables+0x190e/0x27a0 mm/mremap.c:245
 shift_arg_pages fs/exec.c:652 [inline]
 setup_arg_pages+0xbb2/0x13d0 fs/exec.c:764
 load_elf_binary+0x19e3/0x8fe0 fs/binfmt_elf.c:887
 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: 0033:0x7f7d6e4e5207
RSP: 002b:00007fffd4d925b8 EFLAGS: 00000206 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f7d6e4e5207
RDX: 000000000120c2b0 RSI: 00007fffd4d926b0 RDI: 00007fffd4d936c0
RBP: 0000000000625500 R08: 000000000000564a R09: 000000000000564a
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000120c2b0
R13: 0000000000000007 R14: 00000000011fb250 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: ----heads@__run_timers
Variable was created at:
 __run_timers+0x84/0x11b0 kernel/time/timer.c:1651
 run_timer_softirq+0x5f/0x70 kernel/time/timer.c:1694
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