watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:1163] Modules linked in: irq event stamp: 3846313 hardirqs last enabled at (3846312): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3846313): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3404320): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (3404323): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (3404323): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 1163 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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: 1ffff110030095d7 RDX: dffffc0000000000 RSI: ffff88801804ae98 RDI: 0000000000000286 RBP: ffff88804ba375f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88804ba375f0 R14: ffff8880b527bd80 R15: 0000000000000000 FS: 00007ffb5baa9700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd630b4b988 CR3: 000000008edf9000 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:rcu_read_lock include/linux/rcupdate.h:628 [inline] RIP: 0010:lock_page_memcg+0x47/0x220 mm/memcontrol.c:1908 Code: c0 31 f6 68 b0 59 9d 81 b9 02 00 00 00 48 c7 c7 a0 5f f8 89 e8 ba f8 ad ff e8 05 44 b3 ff 5a 85 c0 74 0d 80 3d 1d 33 71 09 00 <0f> 84 e0 00 00 00 0f 1f 44 00 00 4c 8d 7b 38 48 b8 00 00 00 00 00 RSP: 0018:ffff88801d33f6c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: ffffea000259b1c0 RCX: 0000000000000001 RDX: ffffffff819d59b0 RSI: 0000000000000002 RDI: ffff88801804ae44 RBP: ffffea000259b1c0 R08: 00000000dba81147 R09: 0000000000000001 R10: ffff88801804ae70 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffea000259b1c0 R15: 00007ffb5c6a8000 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: 0033:0x7ffb5d536639 Code: Bad RIP value. RSP: 002b:00007ffb5baa9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: 0000000000000004 RBX: 00007ffb5d656f80 RCX: 00007ffb5d536639 RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007ffb5d591ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff11904cef R14: 00007ffb5baa9300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3561 Comm: kworker/u4:4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: bat_events batadv_nc_worker RIP: 0010:debug_lockdep_rcu_enabled+0x8/0xe0 kernel/rcu/update.c:253 Code: 47 00 e9 fa fd ff ff 48 89 ef e8 83 c4 47 00 e9 62 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 c7 c0 44 e0 26 8b 53 <48> ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 RSP: 0018:ffff8880a8ebfca0 EFLAGS: 00000293 RAX: ffffffff8b26e044 RBX: ffff88809d0a7be0 RCX: ffffffff87d8ebb4 RDX: 0000000000000000 RSI: ffffffff87d8f044 RDI: 0000000000000007 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 00000000000003bc R15: ffff8880a4506c00 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555b4f848 CR3: 0000000097c60000 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] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline] batadv_nc_worker+0x619/0xd50 net/batman-adv/network-coding.c:730 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