watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.1:17248] Modules linked in: irq event stamp: 4664127 hardirqs last enabled at (4664126): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (4664127): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (4604078): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (4604081): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (4604081): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 17248 Comm: syz-executor.1 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_tailroom include/linux/skbuff.h:2207 [inline] RIP: 0010:mrp_pdu_append_end_mark.isra.0+0x43/0x1d0 net/802/mrp.c:338 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4c 01 00 00 8b ab 84 00 00 00 <31> ff 89 ee e8 f4 a4 d9 fa 85 ed 74 13 e8 7b a3 d9 fa 41 bc ff ff RSP: 0018:ffff8880ba107c90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff888012170500 RCX: ffffffff86890598 RDX: 0000000000000000 RSI: ffffffff8688eecc RDI: ffff888012170584 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808f3b93e8 R13: ffff88808f3b9360 R14: ffff8880b413c100 R15: 0000000000000000 FS: 00007f0318c79700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000543038 CR3: 00000000a3e3f000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mrp_pdu_queue+0x7e/0x350 net/802/mrp.c:351 mrp_join_timer+0x73/0xc0 net/802/mrp.c:608 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:pte_val arch/x86/include/asm/paravirt.h:389 [inline] RIP: 0010:pte_pfn arch/x86/include/asm/pgtable.h:197 [inline] RIP: 0010:_vm_normal_page+0xb3/0x510 mm/memory.c:834 Code: c0 b8 a4 cf 89 4c 8b 64 24 30 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 e1 03 00 00 48 83 3d 15 1d 44 08 00 <0f> 84 6c 01 00 00 e8 e2 0a d7 ff 4c 89 e7 48 89 f8 0f 1f 40 00 31 RSP: 0018:ffff88801ff9f6c8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff139f497 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff818b8761 RDI: ffff8880b28be630 RBP: 1ffff11003ff3edb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 80000000964d2007 R13: ffff8880b28be630 R14: 00007f0319c88000 R15: ffff88801ff9f6f8 zap_pte_range mm/memory.c:1323 [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+0x1141/0x2c50 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:1015 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1036 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: 0033:0x4665e9 Code: Bad RIP value. RSP: 002b:00007f0318c79188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: 0000000000001000 RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 000000000002ffff R09: 0100000000000009 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffdda936dff R14: 00007f0318c79300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17247 Comm: syz-executor.4 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_release+0x35/0x8b0 kernel/locking/lockdep.c:3917 Code: 57 41 56 41 55 49 89 d5 41 54 55 48 89 fd 53 48 83 ec 78 48 c7 44 24 18 b3 8a b5 41 4c 8d 64 24 18 48 c7 44 24 20 6c 23 b7 89 <49> c1 ec 03 48 c7 44 24 28 50 58 4b 81 49 8d 14 04 65 48 8b 1c 25 RSP: 0018:ffff8880ba007150 EFLAGS: 00000086 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff817a06fe RDX: ffffffff817a063a RSI: 0000000000000001 RDI: ffffffff89f85fe0 RBP: ffffffff89f85fe0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff8c66401b R12: ffff8880ba007168 R13: ffffffff817a063a R14: ffff8880ba007b78 R15: ffff8880ba0075a0 FS: 00007fce897eb700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001b37848 CR3: 00000000a4e31000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] __perf_output_begin kernel/events/ring_buffer.c:254 [inline] perf_output_begin_forward+0x801/0xbf0 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:1419 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1481 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1539 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: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 c8 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 dc 65 d8 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb b2 e8 1b 20 e7 f8 eb c0 0f 0b 0f 0b 48 c7 c7 c8 RSP: 0018:ffff8880ba007c28 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3059 RBX: 0000000000000282 RCX: 1ffff110082eb1cf RDX: dffffc0000000000 RSI: ffff888041758e58 RDI: 0000000000000282 RBP: ffff8880ba022b00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000022b00 R14: 0000000000000000 R15: ffff8880ba022b00 __mod_timer kernel/time/timer.c:1071 [inline] mod_timer+0x4ea/0x1010 kernel/time/timer.c:1114 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:rcu_read_unlock include/linux/rcupdate.h:677 [inline] RIP: 0010:__unlock_page_memcg+0x4d/0x100 mm/memcontrol.c:1955 Code: 02 00 0f 85 b8 00 00 00 65 48 8b 04 25 80 df 01 00 48 39 83 88 06 00 00 74 5a e8 fe e1 b1 ff 85 c0 74 09 80 3d 26 b9 6f 09 00 <74> 1e e8 0c ad b2 ff 5b 48 c7 c2 2f ca 9e 81 be 01 00 00 00 48 c7 RSP: 0018:ffff88801ff7f730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888041758e04 RBP: ffffea000244e980 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: dead000000000100 R15: 00007fce8a8fa000 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:1015 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1036 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: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fce897eb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: 0000000000002000 RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 000000000002ffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fffefff90af R14: 00007fce897eb300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx c: 48 89 f8 mov %rdi,%rax f: 83 e0 07 and $0x7,%eax 12: 83 c0 03 add $0x3,%eax 15: 38 d0 cmp %dl,%al 17: 7c 08 jl 0x21 19: 84 d2 test %dl,%dl 1b: 0f 85 4c 01 00 00 jne 0x16d 21: 8b ab 84 00 00 00 mov 0x84(%rbx),%ebp * 27: 31 ff xor %edi,%edi <-- trapping instruction 29: 89 ee mov %ebp,%esi 2b: e8 f4 a4 d9 fa callq 0xfad9a524 30: 85 ed test %ebp,%ebp 32: 74 13 je 0x47 34: e8 7b a3 d9 fa callq 0xfad9a3b4 39: 41 rex.B 3a: bc .byte 0xbc 3b: ff (bad) 3c: ff .byte 0xff