watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:7467] Modules linked in: irq event stamp: 2932871 hardirqs last enabled at (2932870): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (2932870): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (2932871): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2880808): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2880811): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2880811): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 7467 Comm: syz-executor.1 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:184 Code: 48 c7 c0 88 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 2f 48 83 3d 7c 31 d8 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 fb eb e6 f8 eb c0 0f 0b 0f 0b 48 c7 c7 88 RSP: 0018:ffff8880ba007cb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000286 RCX: 1ffff11013ddd19f RDX: dffffc0000000000 RSI: ffff88809eee8cd8 RDI: 0000000000000286 RBP: ffff888050e61af0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888050e61af0 R14: ffff88805146b500 R15: 0000000000000000 FS: 00007f2162d6b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f930bf6baa0 CR3: 0000000009e6d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:384 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:2839 mrp_queue_xmit net/802/mrp.c:366 [inline] mrp_join_timer+0x97/0xc0 net/802/mrp.c:611 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:__sanitizer_cov_trace_const_cmp4+0x4/0x20 kernel/kcov.c:188 Code: 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 ec fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 ce fe ff ff 66 66 2e 0f 1f 84 00 00 RSP: 0018:ffff88809c7c7660 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88809eee8400 RBX: 0000000000000002 RCX: ffffffff83771e23 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffffff88b3e120 R08: 00000000c985a8da R09: 0000000000000001 R10: ffff88809eee8cb0 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88b3e0e0 R14: ffffea000268cd00 R15: 00007f21635f8000 check_preemption_disabled+0x33/0x280 lib/smp_processor_id.c:15 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock include/linux/rcupdate.h:628 [inline] lock_page_memcg+0x132/0x220 mm/memcontrol.c:1908 page_remove_file_rmap+0x36/0xa30 mm/rmap.c:1212 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 arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f21643f60e9 Code: Bad RIP value. RSP: 002b:00007f2162d6b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: 000000000000001d RBX: 00007f2164508f60 RCX: 00007f21643f60e9 RDX: 000000000000011c RSI: 00000000200017c0 RDI: 0000000000000004 RBP: 00007f216445008d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd66c278ff R14: 00007f2162d6b300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7471 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x4/0x20 kernel/kcov.c:174 Code: 00 00 00 0f 1f 00 48 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 2c ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 <40> 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 0a ff ff ff 66 2e 0f 1f RSP: 0018:ffff8880ba106d78 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff817a02de RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff8880ba1070b0 R08: 0000000000000000 R09: ffffed101742455a R10: ffff8880ba122ad3 R11: ffffffff8c66505b R12: 0000000000000000 R13: 0000000000000001 R14: ffff8880ba1076c8 R15: ffff8880ba107120 FS: 00007f1a536e0700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa8f275a8a3 CR3: 00000000a5f7b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:677 [inline] __perf_output_begin kernel/events/ring_buffer.c:254 [inline] perf_output_begin_forward+0x89e/0xbf0 kernel/events/ring_buffer.c:262 __perf_event_output kernel/events/core.c:6618 [inline] perf_event_output_forward+0x108/0x270 kernel/events/core.c:6634 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:7907 perf_swevent_hrtimer+0x272/0x3e0 kernel/events/core.c:9261 __run_hrtimer kernel/time/hrtimer.c:1465 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:unwind_next_frame+0x743/0x1400 arch/x86/kernel/unwind_orc.c:437 Code: 2c ff ff ff be 02 00 00 00 4c 89 ff 4c 89 44 24 30 48 89 4c 24 28 e8 2c de 6e 00 4c 8b 44 24 30 48 8b 4c 24 28 e9 06 ff ff ff <48> b8 00 00 00 00 00 fc ff df 48 8b 14 24 48 c1 ea 03 80 3c 02 00 RSP: 0018:ffff8880ba107778 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000005 RBX: 1ffff11017420ef8 RCX: ffffffff8bd26435 RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000002 R08: ffffffff8bd26434 R09: ffffffff8bd26430 R10: ffff8880ba107907 R11: 0000000000074071 R12: ffff8880ba1078f0 R13: ffff8880ba1078dd R14: ffff8880ba1078a8 R15: ffffffff8bd26430 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 skb_copy+0x139/0x2f0 net/core/skbuff.c:1358 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb8a/0x1330 drivers/net/wireless/mac80211_hwsim.c:1353 mac80211_hwsim_tx_frame+0x12b/0x210 drivers/net/wireless/mac80211_hwsim.c:1556 mac80211_hwsim_beacon_tx+0x3f8/0x680 drivers/net/wireless/mac80211_hwsim.c:1595 __iterate_interfaces+0x2e1/0x4a0 net/mac80211/util.c:614 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:650 mac80211_hwsim_beacon+0xc9/0x190 drivers/net/wireless/mac80211_hwsim.c:1615 __tasklet_hrtimer_trampoline+0x29/0xa0 kernel/softirq.c:601 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __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:page_remove_rmap+0xe6/0x120 mm/rmap.c:1328 Code: 90 51 d2 ff 48 89 ef e8 f8 86 ff ff 5b 5d 41 5c 41 5d 41 5e e9 7b 51 d2 ff e8 76 51 d2 ff 0f b6 f3 48 89 ef e8 ab 7c ff ff 5b <5d> 41 5c 41 5d 41 5e e9 5e 51 d2 ff e8 59 51 d2 ff 4d 8d 66 ff e9 RSP: 0018:ffff88809bb8f748 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff1101550bda6 RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000286 RBP: ffffea000244a700 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: dead000000000100 R15: 00007f1a53f99000 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 arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1a54d6b0e9 Code: Bad RIP value. RSP: 002b:00007f1a536e0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: 000000000000001d RBX: 00007f1a54e7df60 RCX: 00007f1a54d6b0e9 RDX: 000000000000011c RSI: 00000000200017c0 RDI: 0000000000000005 RBP: 00007f1a54dc508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec81f61af R14: 00007f1a536e0300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 48 c7 c0 88 82 f1 89 mov $0xffffffff89f18288,%rax 7: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx e: fc ff df 11: 48 c1 e8 03 shr $0x3,%rax 15: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 19: 75 2f jne 0x4a 1b: 48 83 3d 7c 31 d8 01 cmpq $0x0,0x1d8317c(%rip) # 0x1d8319f 22: 00 23: 74 15 je 0x3a 25: 48 89 df mov %rbx,%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: eb b2 jmp 0xffffffe3 31: e8 fb eb e6 f8 callq 0xf8e6ec31 36: eb c0 jmp 0xfffffff8 38: 0f 0b ud2 3a: 0f 0b ud2 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: c7 (bad) 3f: 88 .byte 0x88