watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:21271] Modules linked in: irq event stamp: 2962421 hardirqs last enabled at (2962420): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2962421): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (0): [] copy_process.part.0+0x15b9/0x8260 kernel/fork.c:1856 softirqs last disabled at (675): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (675): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 21271 Comm: syz-executor.5 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:call_timer_fn+0x1de/0x700 kernel/time/timer.c:1343 Code: 31 ff 89 de e8 b3 fc 0e 00 84 db 0f 85 f8 02 00 00 e8 76 fb 0e 00 48 c7 c2 05 99 53 81 be 01 00 00 00 4c 89 e7 e8 12 c0 f7 ff <65> 8b 1d 2b 46 ae 7e 81 e3 ff ff ff 7f 89 ef 89 de e8 3c fc 0e 00 RSP: 0018:ffff8880ba007d28 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff110464d9586 RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000282 RBP: 0000000000000100 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880ba007d58 R13: 1ffff11017400fa7 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f022a31b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c023000 CR3: 0000000053612000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:slab_alloc mm/slab.c:3390 [inline] RIP: 0010:__do_kmalloc mm/slab.c:3725 [inline] RIP: 0010:__kmalloc+0x2fa/0x3c0 mm/slab.c:3736 Code: c7 c7 c3 6a b8 89 e8 95 64 a9 ff e9 af fd ff ff e8 7b 98 cf ff 48 83 3d eb 62 59 08 00 0f 84 c3 00 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 e9 1a fe ff ff 65 ff 05 55 bf 69 7e 48 8b 05 c6 da RSP: 0018:ffff888226e17098 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 00000000006080c0 RCX: 1ffff110464d9585 RDX: 0000000000000000 RSI: ffff8882326cac08 RDI: 0000000000000282 RBP: 0000000000000054 R08: ffffffff8cd25c90 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888042f13d00 R13: 00000000006080c0 R14: ffff88813bff04c0 R15: ffff88813bff04c0 kmalloc_array include/linux/slab.h:637 [inline] kcalloc include/linux/slab.h:648 [inline] constrain_params_by_rules+0x10e/0x10b0 sound/core/pcm_native.c:372 snd_pcm_hw_refine sound/core/pcm_native.c:537 [inline] snd_pcm_hw_refine+0xb9b/0xed0 sound/core/pcm_native.c:515 snd_pcm_hw_param_set sound/core/oss/pcm_oss.c:530 [inline] choose_rate sound/core/oss/pcm_oss.c:812 [inline] snd_pcm_oss_change_params_locked+0xdcb/0x39d0 sound/core/oss/pcm_oss.c:896 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1108 [inline] snd_pcm_oss_make_ready+0xe7/0x1b0 sound/core/oss/pcm_oss.c:1167 snd_pcm_oss_set_trigger.isra.0+0x30f/0x6e0 sound/core/oss/pcm_oss.c:2071 snd_pcm_oss_poll+0x661/0xb10 sound/core/oss/pcm_oss.c:2852 vfs_poll include/linux/poll.h:90 [inline] do_select+0x8e1/0x1610 fs/select.c:507 core_sys_select+0x3ac/0x7e0 fs/select.c:650 do_pselect fs/select.c:731 [inline] __do_sys_pselect6 fs/select.c:772 [inline] __se_sys_pselect6+0x419/0x480 fs/select.c:757 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f022cda4709 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:00007f022a31b188 EFLAGS: 00000246 ORIG_RAX: 000000000000010e RAX: ffffffffffffffda RBX: 00007f022cea8f60 RCX: 00007f022cda4709 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000040 RBP: 00007f022cdfecb4 R08: 0000000020000380 R09: 0000000000000000 R10: 0000000020000140 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe06765e4f R14: 00007f022a31b300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 21233 Comm: syz-executor.0 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:perf_trace_lock+0x33f/0x4b0 include/trace/events/lock.h:39 Code: 00 00 00 fc ff df 48 03 85 48 ff ff ff 48 c7 00 00 00 00 00 c7 40 08 00 00 00 00 48 8b 45 d0 65 48 2b 04 25 28 00 00 00 75 70 <48> 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 89 85 38 ff ff ff 4c RSP: 0018:ffff8880ba107c50 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffe8ffffd9ec08 RCX: 1ffffffff139f5e1 RDX: 1ffffd1ffffb3d81 RSI: ffffffff83772911 RDI: ffffffff89f6d420 RBP: ffff8880ba107d28 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66505b R12: ffffffff89f6d3a0 R13: ffff8880ba124cd8 R14: ffffffff814a8790 R15: ffff8880ba107d00 FS: 00007ff3740c2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555721f848 CR3: 00000000a27fd000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x4e8/0x8b0 kernel/locking/lockdep.c:3926 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x1b/0xe0 kernel/locking/spinlock.c:184 __run_hrtimer kernel/time/hrtimer.c:1463 [inline] __hrtimer_run_queues+0x397/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 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: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 db 35 00 e9 ab fe ff ff 4c 89 ef e8 04 db 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 bc 4a 9f 7e 81 e2 00 01 1f 00 RSP: 0018:ffff88822aa9f738 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffffff818bad40 RDX: 0000000000000000 RSI: ffffffff81904042 RDI: ffffea00028d2a80 RBP: ffffea00028d2a80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dead000000000100 R13: ffffea00028d2a80 R14: dffffc0000000000 R15: 00007ff376a3c000 __read_once_size include/linux/compiler.h:261 [inline] compound_head include/linux/page-flags.h:142 [inline] PageAnon include/linux/page-flags.h:418 [inline] page_remove_rmap+0x12/0x120 mm/rmap.c:1296 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: 0033:0x7ff376b4b709 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:00007ff3740c2188 EFLAGS: 00000246 ORIG_RAX: 000000000000010e RAX: fffffffffffffdfe RBX: 00007ff376c4ff60 RCX: 00007ff376b4b709 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000040 RBP: 00007ff376ba5cb4 R08: 0000000020000380 R09: 0000000000000000 R10: 0000000020000140 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc7d7db8ef R14: 00007ff3740c2300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 31 ff xor %edi,%edi 2: 89 de mov %ebx,%esi 4: e8 b3 fc 0e 00 callq 0xefcbc 9: 84 db test %bl,%bl b: 0f 85 f8 02 00 00 jne 0x309 11: e8 76 fb 0e 00 callq 0xefb8c 16: 48 c7 c2 05 99 53 81 mov $0xffffffff81539905,%rdx 1d: be 01 00 00 00 mov $0x1,%esi 22: 4c 89 e7 mov %r12,%rdi 25: e8 12 c0 f7 ff callq 0xfff7c03c * 2a: 65 8b 1d 2b 46 ae 7e mov %gs:0x7eae462b(%rip),%ebx # 0x7eae465c <-- trapping instruction 31: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx 37: 89 ef mov %ebp,%edi 39: 89 de mov %ebx,%esi 3b: e8 3c fc 0e 00 callq 0xefc7c