watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:18148] Modules linked in: irq event stamp: 2424027 hardirqs last enabled at (2424026): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2424027): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (152934): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (152939): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (152939): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 18148 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:lock_acquire+0x3a/0x3c0 kernel/locking/lockdep.c:3897 Code: 56 41 89 ce 41 55 41 89 d5 41 54 41 89 f4 55 48 89 fd 53 65 48 8b 1c 25 c0 df 01 00 48 8d bb 84 08 00 00 48 83 ec 18 48 89 fa <4c> 89 0c 24 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 RSP: 0018:ffff8880ba007cd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888053c76080 RCX: 0000000000000000 RDX: ffff888053c76904 RSI: 0000000000000000 RDI: ffff888053c76904 RBP: ffff8880ba007d58 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007fd4e25df700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555682d708 CR3: 0000000009e6d000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000005800 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x113/0x700 kernel/time/timer.c:1335 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:rcu_read_unlock_special+0x456/0xfc0 kernel/rcu/tree_plugin.h:601 Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 bd 09 00 00 48 83 3d ee 24 a0 08 00 0f 84 37 06 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 83 c4 40 5b 5d 41 5c 41 5d 41 5e 41 5f c3 c3 48 RSP: 0018:ffff8880283576a0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000000 RCX: 1ffff1100a78ed25 RDX: dffffc0000000000 RSI: ffff888053c76930 RDI: 0000000000000286 RBP: ffff888053c763f4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888053c76080 R13: ffff888053c763f6 R14: ffff888053c763f5 R15: ffffffff89f88280 __rcu_read_unlock+0x158/0x160 kernel/rcu/tree_plugin.h:428 rcu_read_unlock include/linux/rcupdate.h:680 [inline] __unlock_page_memcg+0x54/0x100 mm/memcontrol.c:1955 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: 0033:0x7fd4e3c6a049 Code: Bad RIP value. RSP: 002b:00007fd4e25df218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fd4e3d7cf68 RCX: 00007fd4e3c6a049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd4e3d7cf68 RBP: 00007fd4e3d7cf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd4e3d7cf6c R13: 00007ffff676788f R14: 00007fd4e25df300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7103 Comm: kworker/u4:13 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:arch_local_save_flags arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:lockdep_hardirqs_off+0xfd/0x2c0 kernel/locking/lockdep.c:2902 Code: 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 9e 01 00 00 48 83 3d 6a 25 a6 08 00 0f 84 8e 01 00 00 9c <58> 0f 1f 44 00 00 f6 c4 02 0f 85 dc 00 00 00 48 8d bb 50 08 00 00 RSP: 0018:ffff8880922b7bf8 EFLAGS: 00000086 RAX: 1ffffffff13e3050 RBX: ffff8880ab102000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8880ab102884 RBP: ffffffff81392269 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880ab102000 R13: ffffffff87d8d930 R14: 0000000000000078 R15: ffff8880544a6200 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556964848 CR3: 000000009d231000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ---------------- Code disassembly (best guess): 0: 56 push %rsi 1: 41 89 ce mov %ecx,%r14d 4: 41 55 push %r13 6: 41 89 d5 mov %edx,%r13d 9: 41 54 push %r12 b: 41 89 f4 mov %esi,%r12d e: 55 push %rbp f: 48 89 fd mov %rdi,%rbp 12: 53 push %rbx 13: 65 48 8b 1c 25 c0 df mov %gs:0x1dfc0,%rbx 1a: 01 00 1c: 48 8d bb 84 08 00 00 lea 0x884(%rbx),%rdi 23: 48 83 ec 18 sub $0x18,%rsp 27: 48 89 fa mov %rdi,%rdx * 2a: 4c 89 0c 24 mov %r9,(%rsp) <-- trapping instruction 2e: 48 c1 ea 03 shr $0x3,%rdx 32: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 36: 48 89 f8 mov %rdi,%rax 39: 83 e0 07 and $0x7,%eax 3c: 83 c0 03 add $0x3,%eax 3f: 38 .byte 0x38