bridge0: received packet on veth0_to_bridge with own address as source address (addr:24:02:48:ff:05:00, vlan:0) ICMPv6: NA: 24:02:48:ff:05:00 advertised our address fe80::2602:48ff:feff:500 on bridge0! bridge0: received packet on bridge_slave_0 with own address as source address (addr:24:02:48:ff:05:00, vlan:0) watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:2069] Modules linked in: irq event stamp: 2606183 hardirqs last enabled at (2606182): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (2606182): [] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (2606183): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2605540): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2605543): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2605543): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 2069 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3911 Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 09 2e a6 08 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0000:ffff8880ba107c80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff888092382180 RCX: 0000000000006473 RDX: dffffc0000000000 RSI: 0000000034dd1af1 RDI: 0000000000000286 RBP: ffff8880b3236638 R08: ffffffff8cd498d8 R09: 0000000000000003 R10: ffff888092382a80 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000555556f3e400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc25efb7000 CR3: 00000000a1688000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] mrp_periodic_timer+0x34/0x170 net/802/mrp.c:625 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:PageCompound include/linux/page-flags.h:156 [inline] RIP: 0010:PageHuge+0x2a/0x160 mm/hugetlb.c:1374 Code: 41 54 55 53 48 89 fb e8 b4 65 ce ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 13 01 00 00 48 8b 2b <31> ff 48 c1 ed 0f 83 e5 01 89 ee e8 b6 66 ce ff 40 84 ed 0f 84 8c RSP: 0000:ffff88808b0376e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffea00013cfb00 RCX: ffffffff81518c83 RDX: 1ffffd4000279f60 RSI: ffffffff81941fbc RDI: ffffea00013cfb00 RBP: 00fff00000000000 R08: 0000000000000000 R09: ffffed101742455a R10: ffff8880ba122ad3 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffea00013cfb00 R15: 00007fda490e9000 page_remove_file_rmap+0x3e/0xa30 mm/rmap.c:1215 page_remove_rmap+0xe5/0x120 mm/rmap.c:1297 zap_pte_range mm/memory.c:1350 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x147d/0x2c50 mm/memory.c:1534 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198 retint_user+0x8/0x18 RIP: 0033:0x7fda4af82bc7 Code: Bad RIP value. RSP: 002b:00007ffdccff4f50 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000027bf46fe RBX: 00007fda4ad4c008 RCX: 0000001b2dd20000 RDX: 0000001b2dd20ce8 RSI: ffffffff8189796f RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000027bf46fe R09: 0000001b2dd20cc4 R10: 00000000000006fe R11: 0000000027bf4702 R12: 0000000000000035 R13: 00007fda4b0dc000 R14: ffffffff8189796f R15: 00007fda4b0e7ff0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8071 Comm: kworker/u4:6 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:perf_trace_lock+0xe2/0x4b0 include/trace/events/lock.h:39 Code: fa 48 89 85 50 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 bc 02 00 00 49 8b 5c 24 78 e8 3e a7 2c 02 <48> ba 00 00 00 00 00 fc ff df 89 c0 48 8d 3c c5 00 af cf 89 48 89 RSP: 0018:ffff8880973ffaa8 EFLAGS: 00000093 RAX: 0000000000000000 RBX: 0000607f45c70ea0 RCX: ffffffff83771e23 RDX: 0000000000000000 RSI: ffffffff83771e31 RDI: 0000000000000005 RBP: ffff8880973ffb80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff89f6d360 R13: ffffffff89f85fa0 R14: ffffffff814a7850 R15: ffff8880973ffb58 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc25efbb020 CR3: 00000000aad5c000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x4e8/0x8b0 kernel/locking/lockdep.c:3926 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] batadv_nc_process_nc_paths.part.0+0x285/0x3d0 net/batman-adv/network-coding.c:710 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:690 [inline] batadv_nc_worker+0x9bb/0xd50 net/batman-adv/network-coding.c:739 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 00 48 c1 add %cl,-0x3f(%rax) 9: e8 03 80 3c 10 callq 0x103c8011 e: 00 0f add %cl,(%rdi) 10: 85 b7 01 00 00 48 test %esi,0x48000001(%rdi) 16: 83 3d 09 2e a6 08 00 cmpl $0x0,0x8a62e09(%rip) # 0x8a62e26 1d: 0f 84 2a 01 00 00 je 0x14d 23: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 83 c4 18 add $0x18,%rsp 33: 5b pop %rbx 34: 5d pop %rbp 35: 41 5c pop %r12 37: 41 5d pop %r13 39: 41 5e pop %r14 3b: 41 5f pop %r15 3d: c3 retq 3e: 65 gs 3f: 8b .byte 0x8b