=====================================================
BUG: KMSAN: uninit-value in update_stack_state+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
CPU: 1 PID: 577 Comm: kworker/u4:10 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_bla_periodic_work
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
 pskb_expand_head+0x38b/0x1b00 net/core/skbuff.c:1636
 netif_receive_generic_xdp net/core/dev.c:4616 [inline]
 do_xdp_generic+0x58c/0x24f0 net/core/dev.c:4735
 __netif_receive_skb_core+0x9a0/0x5890 net/core/dev.c:5107
 __netif_receive_skb_one_core net/core/dev.c:5279 [inline]
 __netif_receive_skb net/core/dev.c:5395 [inline]
 process_backlog+0x605/0x14e0 net/core/dev.c:6239
 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_slab_alloc+0xb4/0xe0 mm/kmsan/kmsan_hooks.c:83
Code: eb 0a ba 01 00 00 00 e8 1a ed ff ff be ff ff ff ff 65 0f c1 35 cd de 11 7d ff ce 75 1c e8 44 6a 2e ff 4c 89 65 d8 ff 75 d8 9d <48> 83 c4 10 5b 41 5c 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 ea 03 4a 90
RSP: 0018:ffff918781c1b780 EFLAGS: 00000246
RAX: 735938f5a2918b00 RBX: ffff8a903cad2b00 RCX: 0000000000000039
RDX: 0000000000000038 RSI: 0000000000000000 RDI: ffff8a903cad2b00
RBP: ffff918781c1b7b0 R08: ffffb9fa8000000f R09: ffff8a90efffb000
R10: 000000000000000b R11: ffffffff8fa0083d R12: 0000000000000246
R13: ffff8a91dde71180 R14: 0000000000000a20 R15: ffff8a91dde71180
 slab_alloc_node mm/slub.c:2839 [inline]
 kmem_cache_alloc_node+0x931/0xed0 mm/slub.c:2876
 __alloc_skb+0x208/0xac0 net/core/skbuff.c:198
 alloc_skb include/linux/skbuff.h:1083 [inline]
 arp_create+0x2e9/0xfa0 net/ipv4/arp.c:537
 batadv_bla_send_claim+0x379/0x1230 net/batman-adv/bridge_loop_avoidance.c:354
 batadv_bla_send_loopdetect net/batman-adv/bridge_loop_avoidance.c:1387 [inline]
 batadv_bla_periodic_work+0xa42/0xef0 net/batman-adv/bridge_loop_avoidance.c:1477
 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
=====================================================