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BUG: KMSAN: uninit-value in update_stack_state+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
CPU: 1 PID: 1468 Comm: kworker/u4:25 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1df/0x240 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+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
 unwind_next_frame+0x8c6/0xed0 arch/x86/kernel/unwind_frame.c:305
 arch_stack_walk+0x33e/0x3e0 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
 skb_copy_from_linear_data_offset include/linux/skbuff.h:3636 [inline]
 skb_copy_bits+0x217/0xdd0 net/core/skbuff.c:2200
 veth_xdp_rcv_skb drivers/net/veth.c:686 [inline]
 veth_xdp_rcv drivers/net/veth.c:812 [inline]
 veth_poll+0x22bb/0x54f0 drivers/net/veth.c:843
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x746/0x1aa0 net/core/dev.c:6752
 __do_softirq+0x311/0x83d kernel/softirq.c:293
 asm_call_on_stack+0x12/0x20 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:kmsan_get_metadata+0x0/0x180 mm/kmsan/kmsan_shadow.c:175
Code: 45 0f b6 c7 48 c7 c7 b4 06 8a 9e 48 c7 c6 d5 06 8a 9e 4c 89 f2 31 c0 e8 b0 e2 44 ff 0f 0b 66 90 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 53 41 89 d6 48 89 fb 48 83 e3 fc 85 d2 48
RSP: 0018:ffffaea94312b790 EFLAGS: 00000202
RAX: 0000000000000008 RBX: 000000000000000b RCX: ffffffff907863fa
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffaea94312b868
RBP: ffffaea94312b7c0 R08: 0000000000000002 R09: ffffaea94312b808
R10: 0000000000000004 R11: 0000000000000000 R12: 00000000079d0008
R13: 0000000000000008 R14: 0000000000000008 R15: ffffaea94312b868
 __msan_poison_alloca+0xf0/0x120 mm/kmsan/kmsan_instr.c:191
 native_save_fl kernel/softirq.c:169 [inline]
 arch_local_save_flags arch/x86/include/asm/irqflags.h:79 [inline]
 arch_local_irq_save arch/x86/include/asm/irqflags.h:120 [inline]
 do_softirq kernel/softirq.c:333 [inline]
 __local_bh_enable_ip+0xea/0x1d0 kernel/softirq.c:190
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 __dev_queue_xmit+0x338e/0x3b20 net/core/dev.c:4158
 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4164
 batadv_send_skb_packet+0x59b/0x8c0 net/batman-adv/send.c:108
 batadv_send_broadcast_skb+0x76/0x90 net/batman-adv/send.c:127
 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:393 [inline]
 batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:419 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x97e/0xd50 net/batman-adv/bat_iv_ogm.c:1710
 process_one_work+0x1540/0x1f30 kernel/workqueue.c:2269
 worker_thread+0xed2/0x23f0 kernel/workqueue.c:2415
 kthread+0x515/0x550 kernel/kthread.c:292
 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:293

Local variable ----namespaces_event@perf_event_namespaces created at:
 perf_event_namespaces+0x53/0x1190 kernel/events/core.c:7732
 perf_event_namespaces+0x53/0x1190 kernel/events/core.c:7732
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