================================================================== BUG: KMSAN: uninit-value in update_stack_state+0x9e5/0xaa0 arch/x86/kernel/unwind_frame.c:266 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-rc3+ #104 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x32d/0x480 lib/dump_stack.c:113 kmsan_report+0x12c/0x290 mm/kmsan/kmsan.c:683 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:316 update_stack_state+0x9e5/0xaa0 arch/x86/kernel/unwind_frame.c:266 unwind_next_frame+0x64c/0xed0 arch/x86/kernel/unwind_frame.c:329 __save_stack_trace+0x357/0x5d0 arch/x86/kernel/stacktrace.c:47 save_stack_trace+0xc6/0x110 arch/x86/kernel/stacktrace.c:63 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:246 [inline] kmsan_save_stack mm/kmsan/kmsan.c:261 [inline] kmsan_internal_chain_origin+0x162/0x260 mm/kmsan/kmsan.c:469 kmsan_memcpy_memmove_metadata+0x1a9/0xf70 mm/kmsan/kmsan.c:344 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:362 __msan_memcpy+0x61/0x70 mm/kmsan/kmsan_instr.c:148 pskb_expand_head+0x436/0x1d20 net/core/skbuff.c:1470 __pskb_pull_tail+0x1c6/0x2270 net/core/skbuff.c:1896 __skb_linearize include/linux/skbuff.h:3078 [inline] skb_checksum_help+0x345/0xd80 net/core/dev.c:2903 skb_csum_hwoffload_help net/core/dev.c:3302 [inline] validate_xmit_skb+0x115c/0x1780 net/core/dev.c:3345 __dev_queue_xmit+0x2343/0x3e00 net/core/dev.c:3830 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3871 neigh_hh_output include/net/neighbour.h:474 [inline] neigh_output include/net/neighbour.h:482 [inline] ip_finish_output2+0x136d/0x1560 net/ipv4/ip_output.c:229 ip_finish_output+0xd93/0x10f0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x55c/0x630 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:444 [inline] ip_local_out+0x164/0x1d0 net/ipv4/ip_output.c:124 iptunnel_xmit+0x812/0xd30 net/ipv4/ip_tunnel_core.c:91 ip_tunnel_xmit+0x3943/0x3d90 net/ipv4/ip_tunnel.c:787 sit_tunnel_xmit__ net/ipv6/sit.c:1013 [inline] sit_tunnel_xmit+0xbf8/0x3d40 net/ipv6/sit.c:1026 __netdev_start_xmit include/linux/netdevice.h:4356 [inline] netdev_start_xmit include/linux/netdevice.h:4365 [inline] xmit_one net/core/dev.c:3252 [inline] dev_hard_start_xmit+0x6dc/0xde0 net/core/dev.c:3268 __dev_queue_xmit+0x2d9e/0x3e00 net/core/dev.c:3838 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3871 neigh_direct_output+0x42/0x50 net/core/neighbour.c:1422 neigh_output include/net/neighbour.h:484 [inline] ip_finish_output2+0x141a/0x1560 net/ipv4/ip_output.c:229 ip_finish_output+0xd93/0x10f0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x55c/0x630 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:444 [inline] ip_local_out net/ipv4/ip_output.c:124 [inline] __ip_queue_xmit+0x1bb5/0x2170 net/ipv4/ip_output.c:505 ip_queue_xmit+0xcc/0xf0 include/net/ip.h:197 __tcp_transmit_skb+0x425c/0x5e00 net/ipv4/tcp_output.c:1160 tcp_transmit_skb net/ipv4/tcp_output.c:1176 [inline] __tcp_retransmit_skb+0x2fe9/0x46c0 net/ipv4/tcp_output.c:2912 tcp_retransmit_skb+0xa4/0x430 net/ipv4/tcp_output.c:2931 tcp_retransmit_timer+0x341b/0x4910 net/ipv4/tcp_timer.c:512 tcp_write_timer_handler+0x51d/0xe80 net/ipv4/tcp_timer.c:598 tcp_write_timer+0x139/0x250 net/ipv4/tcp_timer.c:618 call_timer_fn+0x356/0x7c0 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xe95/0x1300 kernel/time/timer.c:1682 run_timer_softirq+0x55/0xa0 kernel/time/timer.c:1695 __do_softirq+0x721/0xc7f kernel/softirq.c:293 invoke_softirq kernel/softirq.c:375 [inline] irq_exit+0x305/0x340 kernel/softirq.c:416 scheduler_ipi+0x172/0x250 kernel/sched/core.c:1787 smp_reschedule_interrupt+0x1b8/0x670 arch/x86/kernel/smp.c:278 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:833 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:57 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:99 [inline] RIP: 0010:default_idle+0x3f/0x80 arch/x86/kernel/process.c:498 Code: 04 00 00 00 e8 32 86 10 f7 65 8b 34 25 20 a1 02 00 c7 03 00 00 00 00 c7 43 08 00 00 00 00 bf 01 00 00 00 e8 f3 84 48 f6 fb f4 <48> c7 c7 20 a1 02 00 be 04 00 00 00 e8 00 86 10 f7 65 8b 34 25 20 RSP: 0018:ffff8881d0f1fe18 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff02 RAX: d54a95af99ec8c00 RBX: ffff8881d0ec8988 RCX: 0000000000000000 RDX: ffff8881fbb686c8 RSI: 0000160000000000 RDI: 0000000000000000 RBP: ffff8881d0f1fe20 R08: ffff888000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff8af8dc40 R12: ffff8881d0ec8000 R13: 0000000000000001 R14: ffff8881d0ec8988 R15: ffff8881d0f1fe78 arch_cpu_idle+0x26/0x30 arch/x86/kernel/process.c:489 default_idle_call kernel/sched/idle.c:93 [inline] cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3e4/0x9b0 kernel/sched/idle.c:262 cpu_startup_entry+0x45/0x50 kernel/sched/idle.c:353 start_secondary+0x57b/0x6a0 arch/x86/kernel/smpboot.c:271 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Local variable description: ----v.addr.i.i.i.i@tsc_verify_tsc_adjust Variable was created at: tsc_verify_tsc_adjust+0x62/0x5d0 arch/x86/kernel/tsc_sync.c:48 arch_cpu_idle_enter+0x13/0x20 arch/x86/kernel/process.c:475 ==================================================================