=====================================================
BUG: KMSAN: uninit-value in update_stack_state+0x1ee/0xb40 arch/x86/kernel/unwind_frame.c:202
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.8.0-rc5-syzkaller #0
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+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 update_stack_state+0x1ee/0xb40 arch/x86/kernel/unwind_frame.c:202
 unwind_next_frame+0x8c6/0xed0 arch/x86/kernel/unwind_frame.c:305
 arch_stack_walk+0x338/0x3d0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:123
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310
 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267
 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116
 pskb_expand_head+0x3fd/0x1e30 net/core/skbuff.c:1636
 netif_receive_generic_xdp+0x629/0x2530 net/core/dev.c:4616
 do_xdp_generic net/core/dev.c:4735 [inline]
 __netif_receive_skb_core+0x823/0x6520 net/core/dev.c:5107
 __netif_receive_skb_one_core net/core/dev.c:5279 [inline]
 __netif_receive_skb+0x164/0x670 net/core/dev.c:5395
 process_backlog+0x50d/0xba0 net/core/dev.c:6239
 napi_poll+0x43b/0xfd0 net/core/dev.c:6684
 net_rx_action+0x35c/0xd40 net/core/dev.c:6752
 __do_softirq+0x2ea/0x7f5 kernel/softirq.c:293
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:23 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 do_softirq_own_stack+0x7c/0xa0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:390 [inline]
 __irq_exit_rcu+0x226/0x270 kernel/softirq.c:420
 irq_exit_rcu+0xe/0x10 kernel/softirq.c:432
 sysvec_call_function_single+0x107/0x130 arch/x86/kernel/smp.c:243
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:601
RIP: 0010:pfn_valid include/linux/mmzone.h:1330 [inline]
RIP: 0010:kmsan_virt_addr_valid mm/kmsan/kmsan_shadow.c:91 [inline]
RIP: 0010:virt_to_page_or_null+0x7e/0xf0 mm/kmsan/kmsan_shadow.c:129
Code: 0c f1 4d 85 c9 74 1f 48 89 d6 48 c1 ee 1b 83 e6 7f 48 c1 e6 05 4c 89 c9 48 01 f1 74 09 4c 8b 01 41 f6 c0 02 75 04 31 c0 5d c3 <41> f6 c0 08 75 12 48 c1 ea 15 49 8b 4c 31 08 83 e2 3f 48 0f a3 11
RSP: 0018:ffff88812df73d58 EFLAGS: 00000202
RAX: ffff8881adf68024 RBX: ffff88812df68024 RCX: ffff88812fffa4a0
RDX: 000000012df68024 RSI: 00000000000004a0 RDI: ffff88812df68024
RBP: ffff88812df73d58 R08: ffffea000000000f R09: ffff88812fffa000
R10: 0000000000000004 R11: 0000000000000000 R12: ffff88812df68000
R13: 0000000000200000 R14: 0000000000000000 R15: 0000000000000000
 kmsan_get_metadata+0x116/0x180 mm/kmsan/kmsan_shadow.c:194
 kmsan_get_shadow_origin_ptr+0x6c/0xb0 mm/kmsan/kmsan_shadow.c:149
 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:54
 to_kthread kernel/kthread.c:83 [inline]
 __kthread_should_park kernel/kthread.c:117 [inline]
 kthread_should_park+0x3a/0x130 kernel/kthread.c:134
 smpboot_thread_fn+0x18d/0xa90 kernel/smpboot.c:125
 kthread+0x551/0x590 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Local variable ----heads@__run_timers created at:
 __run_timers+0x61/0xd30 kernel/time/timer.c:1742
 __run_timers+0x61/0xd30 kernel/time/timer.c:1742
=====================================================