watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.4:30558] Modules linked in: irq event stamp: 4020049 hardirqs last enabled at (4020048): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (4020049): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2767524): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2767527): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2767527): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 30558 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 <65> 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 RSP: 0018:ffff8880ba107cb0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000103 RBX: 0000000000000103 RCX: ffffffff83771e23 RDX: 0000000000000103 RSI: ffffffff83771e2c RDI: 0000000000000005 RBP: ffffffff88b3e120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff88b3e0e0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f645d6f7700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560b254f10e8 CR3: 000000009ee25000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x3c/0x280 lib/smp_processor_id.c:25 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_sched_held+0xc6/0x1d0 kernel/rcu/update.c:113 trace_timer_expire_exit include/trace/events/timer.h:121 [inline] call_timer_fn+0x617/0x700 kernel/time/timer.c:1339 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:zap_pte_range mm/memory.c:1350 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1463 [inline] RIP: 0010:zap_pud_range mm/memory.c:1492 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1513 [inline] RIP: 0010:unmap_page_range+0x1473/0x2c50 mm/memory.c:1534 Code: 98 48 89 f8 48 c1 e8 03 42 0f b6 14 30 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 39 15 00 00 83 ac 9c 00 01 00 00 01 <31> f6 4c 89 ef e8 a3 92 04 00 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 RSP: 0018:ffff888024e27778 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffffff818ba030 RDX: 0000000000000000 RSI: ffffffff818ba03b RDI: ffff888024e27878 RBP: ffffea0002346d88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dead000000000100 R13: ffffea0002346d80 R14: dffffc0000000000 R15: 00007f645ecad000 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: 0033:0x7f6460120059 Code: Bad RIP value. RSP: 002b:00007f645d6f6d40 EFLAGS: 00010202 RAX: 00007f6460120050 RBX: 00007f6460294f60 RCX: 0000000000000000 RDX: 0000000000002000 RSI: 0000000000000fff RDI: 0000000020000000 RBP: 00007f64601dbf25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 00007ffd7283cf3f R14: 00007f645d6f7300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9021 Comm: kworker/u4:5 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:lookup_chain_cache kernel/locking/lockdep.c:2318 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2337 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:2391 [inline] RIP: 0010:__lock_acquire+0xbed/0x3ff0 kernel/locking/lockdep.c:3416 Code: db 74 55 48 83 eb 08 74 4f 48 bd 00 00 00 00 00 fc ff df eb 06 48 83 eb 08 74 3d 48 8d 7b 18 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 8c 1e 00 00 4c 3b 63 18 0f 84 f1 fc ff ff 48 8d 7b 08 48 89 RSP: 0018:ffff8880ba007928 EFLAGS: 00000046 RAX: 1ffffffff18f8a17 RBX: ffffffff8c7c50a0 RCX: 00000000000073f6 RDX: 1ffffffff19aa29e RSI: 000000005b45c111 RDI: ffffffff8c7c50b8 RBP: dffffc0000000000 R08: ffffffff8cd514f0 R09: 0000000000000005 R10: ffff888054bb8dd0 R11: 0000000000000000 R12: d2a92696d53f6a2f R13: ffff888054bb8480 R14: ffff888054bb8de8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00ee0afe8 CR3: 00000000a8b7f000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:152 try_to_wake_up+0x7b/0x1050 kernel/sched/core.c:1961 wake_up_worker kernel/workqueue.c:839 [inline] insert_work+0x28b/0x360 kernel/workqueue.c:1312 __queue_work+0x5cd/0x1100 kernel/workqueue.c:1464 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x97/0x4e0 kernel/time/timer.c:1371 __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:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:__rcu_read_unlock+0xcc/0x160 kernel/rcu/tree_plugin.h:427 Code: 8c 00 00 00 c7 83 70 03 00 00 00 00 00 80 48 8d bb 74 03 00 00 48 b8 00 00 00 00 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 04 84 d2 75 62 8b 83 74 03 00 RSP: 0018:ffff8880544b7c28 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888054bb8480 RCX: ffffffff87d8c65d RDX: 0000000000000000 RSI: ffffffff87d8c593 RDI: ffff888054bb87f4 RBP: ffff888054bb87f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888056036368 R14: ffff888056035940 R15: 0000000000000029 rcu_read_unlock include/linux/rcupdate.h:680 [inline] batadv_nc_process_nc_paths.part.0+0x268/0x3d0 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: e8 11 dd 35 00 callq 0x35dd16 5: e9 ab fe ff ff jmpq 0xfffffeb5 a: 4c 89 ef mov %r13,%rdi d: e8 04 dd 35 00 callq 0x35dd16 12: e9 23 fe ff ff jmpq 0xfffffe3a 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 48 8b 34 24 mov (%rsp),%rsi * 2a: 65 48 8b 04 25 c0 df mov %gs:0x1dfc0,%rax <-- trapping instruction 31: 01 00 33: 65 8b 15 cc 59 9f 7e mov %gs:0x7e9f59cc(%rip),%edx # 0x7e9f5a06 3a: 81 e2 00 01 1f 00 and $0x1f0100,%edx