watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.0:6254] Modules linked in: irq event stamp: 4203421 hardirqs last enabled at (4203420): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (4203420): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (4203421): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1382674): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (1382677): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1382677): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 6254 Comm: syz-executor.0 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:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930 Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d 7b 34 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00 RSP: 0018:ffff8880ba007c68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff888051b9e380 RCX: 1ffff1100a373d8b RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000286 RBP: 0000000000000002 R08: ffff8880ba0277c8 R09: 0000000000000002 R10: ffff8880ba007b08 R11: 0000000000000000 R12: 1ffff11017400f90 R13: 1a83f621bacb2055 R14: ffff888051b9e380 R15: 0000000000000003 FS: 00007f2bc4bf0700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e426de3a4 CR3: 000000009f2e5000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:176 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:_vm_normal_page+0x6c/0x510 mm/memory.c:832 Code: c7 44 24 20 30 82 8b 81 c7 00 f1 f1 f1 f1 c7 40 04 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 44 24 68 31 c0 48 89 54 24 30 cf 02 d7 ff 4c 8d 7c 24 30 4c 89 f8 48 c1 e8 03 80 3c 18 00 0f RSP: 0018:ffff88803be7f6c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: 800000008d9a9007 RSI: 00007f2bc5ae1000 RDI: ffff888037974c60 RBP: 1ffff110077cfedb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 800000008d9a9007 R13: ffff888037974c60 R14: 00007f2bc5ae1000 R15: 00007f2bc5ae2000 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: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: 0033:0x7f2bc767aae9 Code: Bad RIP value. RSP: 002b:00007f2bc4bf0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: 0000000000000000 RBX: 00007f2bc778df60 RCX: 00007f2bc767aae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000400 RBP: 00007f2bc76d4f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc7d8d7ddf R14: 00007f2bc4bf0300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess): 0: 84 08 test %cl,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 00 00 add %al,(%rax) 8: 48 c1 e8 03 shr $0x3,%rax c: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 10: 0f 85 95 03 00 00 jne 0x3ab 16: 48 83 3d 7b 34 a6 08 cmpq $0x0,0x8a6347b(%rip) # 0x8a63499 1d: 00 1e: 0f 84 cc 01 00 00 je 0x1f0 24: 48 8b 3c 24 mov (%rsp),%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 36: fc ff df 39: 49 rex.WB 3a: c7 .byte 0xc7 3b: 04 04 add $0x4,%al 3d: 00 00 add %al,(%rax)