./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3033724499 <...> Warning: Permanently added '10.128.1.128' (ED25519) to the list of known hosts. execve("./syz-executor3033724499", ["./syz-executor3033724499"], 0x7ffee4a70d20 /* 10 vars */) = 0 brk(NULL) = 0x555556110000 brk(0x555556110d00) = 0x555556110d00 arch_prctl(ARCH_SET_FS, 0x555556110380) = 0 set_tid_address(0x555556110650) = 294 set_robust_list(0x555556110660, 24) = 0 rseq(0x555556110ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3033724499", 4096) = 28 getrandom("\xe5\xde\x28\x2d\xf9\xcb\x65\x82", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556110d00 brk(0x555556131d00) = 0x555556131d00 brk(0x555556132000) = 0x555556132000 mprotect(0x7fa0d018b000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556110650) = 295 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556110650) = 296 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556110650) = 297 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556110650) = 298 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556110650) = 299 ./strace-static-x86_64: Process 295 attached [pid 295] set_robust_list(0x555556110660, 24) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556110650) = 300 ./strace-static-x86_64: Process 300 attached [pid 300] set_robust_list(0x555556110660, 24) = 0 [pid 300] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 300] setpgid(0, 0) = 0 [pid 300] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 300] write(3, "1000", 4) = 4 [pid 300] close(3) = 0 [pid 300] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000) = 3 [pid 300] close(3) = 0 [pid 300] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 300] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 300] ioctl(3, SNDRV_TIMER_IOCTL_PARAMS, 0x20000440) = 0 [pid 300] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 4 [pid 300] ioctl(4, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 300] ioctl(4, SNDRV_TIMER_IOCTL_START, 0) = 0 [pid 300] ioctl(3, SNDRV_TIMER_IOCTL_CONTINUE, 0) = 0 [pid 300] exit_group(0) = ? [pid 300] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=300, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 299 attached ./strace-static-x86_64: Process 298 attached ./strace-static-x86_64: Process 297 attached ./strace-static-x86_64: Process 296 attached , child_tidptr=0x555556110650) = 301 [pid 299] set_robust_list(0x555556110660, 24./strace-static-x86_64: Process 301 attached [pid 298] set_robust_list(0x555556110660, 24 [pid 297] set_robust_list(0x555556110660, 24 [pid 296] set_robust_list(0x555556110660, 24 [pid 299] <... set_robust_list resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556110650) = 302 [pid 298] <... set_robust_list resumed>) = 0 [pid 297] <... set_robust_list resumed>) = 0 [pid 296] <... set_robust_list resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 302 attached [pid 302] set_robust_list(0x555556110660, 24) = 0 [pid 302] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 302] setpgid(0, 0) = 0 [pid 302] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 302] write(3, "1000", 4) = 4 [pid 297] <... clone resumed>, child_tidptr=0x555556110650) = 305 [pid 298] <... clone resumed>, child_tidptr=0x555556110650) = 304 [pid 296] <... clone resumed>, child_tidptr=0x555556110650) = 303 ./strace-static-x86_64: Process 305 attached [pid 301] set_robust_list(0x555556110660, 24 [pid 302] close(3 [pid 301] <... set_robust_list resumed>) = 0 [pid 302] <... close resumed>) = 0 [pid 302] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000./strace-static-x86_64: Process 304 attached ./strace-static-x86_64: Process 303 attached [pid 305] set_robust_list(0x555556110660, 24 [pid 302] <... openat resumed>) = 3 [pid 301] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 302] close(3 [pid 305] <... set_robust_list resumed>) = 0 [pid 301] <... prctl resumed>) = 0 [pid 304] set_robust_list(0x555556110660, 24 [pid 301] setpgid(0, 0 [pid 305] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 304] <... set_robust_list resumed>) = 0 [pid 303] set_robust_list(0x555556110660, 24 [pid 302] <... close resumed>) = 0 [pid 301] <... setpgid resumed>) = 0 [pid 305] <... prctl resumed>) = 0 [pid 301] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 305] setpgid(0, 0 [pid 304] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 303] <... set_robust_list resumed>) = 0 [pid 301] <... openat resumed>) = 3 [pid 301] write(3, "1000", 4) = 4 [pid 301] close(3) = 0 [pid 301] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000) = 3 [pid 301] close(3 [pid 305] <... setpgid resumed>) = 0 [pid 304] <... prctl resumed>) = 0 [pid 301] <... close resumed>) = 0 [pid 301] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 301] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 301] ioctl(3, SNDRV_TIMER_IOCTL_PARAMS, 0x20000440) = 0 [pid 301] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 4 [pid 301] ioctl(4, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 301] ioctl(4, SNDRV_TIMER_IOCTL_START, 0) = 0 [pid 301] ioctl(3, SNDRV_TIMER_IOCTL_CONTINUE, 0) = 0 [pid 301] exit_group(0) = ? [pid 305] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 304] setpgid(0, 0 [pid 303] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 302] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY [pid 305] write(3, "1000", 4 [pid 301] +++ exited with 0 +++ [pid 304] <... setpgid resumed>) = 0 [pid 303] <... prctl resumed>) = 0 [pid 302] <... openat resumed>) = 3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=301, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 305] <... write resumed>) = 4 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 305] close(3 [pid 303] setpgid(0, 0) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 302] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 303] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 302] ioctl(3, SNDRV_TIMER_IOCTL_PARAMS, 0x20000440 [pid 303] <... openat resumed>) = 3 [pid 302] <... ioctl resumed>) = 0 [pid 302] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 4 [pid 302] ioctl(4, SNDRV_TIMER_IOCTL_SELECT, 0x20000100 [pid 295] <... clone resumed>, child_tidptr=0x555556110650) = 306 [pid 302] <... ioctl resumed>) = 0 [pid 305] <... close resumed>) = 0 [pid 302] ioctl(4, SNDRV_TIMER_IOCTL_START, 0 [pid 303] write(3, "1000", 4 [pid 302] <... ioctl resumed>) = 0 [pid 303] <... write resumed>) = 4 [pid 303] close(3 [pid 302] ioctl(3, SNDRV_TIMER_IOCTL_CONTINUE, 0 [pid 303] <... close resumed>) = 0 [pid 302] <... ioctl resumed>) = 0 [pid 303] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000 [pid 302] exit_group(0 [pid 303] <... openat resumed>) = 3 [pid 302] <... exit_group resumed>) = ? [pid 305] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000 [pid 304] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 306 attached [pid 305] <... openat resumed>) = 3 [pid 304] <... openat resumed>) = 3 [pid 302] +++ exited with 0 +++ [pid 305] close(3 [pid 304] write(3, "1000", 4 [pid 306] set_robust_list(0x555556110660, 24 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=302, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 303] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 306] <... set_robust_list resumed>) = 0 [pid 305] <... close resumed>) = 0 [pid 304] <... write resumed>) = 4 [pid 303] <... close resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x555556110650) = 307 ./strace-static-x86_64: Process 307 attached [pid 305] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY [pid 307] set_robust_list(0x555556110660, 24) = 0 [pid 307] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 304] close(3 [pid 307] <... prctl resumed>) = 0 [pid 305] <... openat resumed>) = 3 [pid 304] <... close resumed>) = 0 [pid 307] setpgid(0, 0) = 0 [pid 305] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 304] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000 [pid 305] ioctl(3, SNDRV_TIMER_IOCTL_PARAMS, 0x20000440 [pid 304] <... openat resumed>) = 3 [pid 305] <... ioctl resumed>) = 0 [pid 304] close(3 [pid 305] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY [pid 307] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 307] write(3, "1000", 4) = 4 [pid 307] close(3) = 0 [pid 307] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000) = 3 [pid 307] close(3 [pid 305] <... openat resumed>) = 4 [pid 304] <... close resumed>) = 0 [pid 305] ioctl(4, SNDRV_TIMER_IOCTL_SELECT, 0x20000100 [pid 304] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY [pid 307] <... close resumed>) = 0 [pid 305] <... ioctl resumed>) = 0 [pid 307] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY [pid 305] ioctl(4, SNDRV_TIMER_IOCTL_START, 0 [pid 304] <... openat resumed>) = 3 [pid 307] <... openat resumed>) = 3 [pid 307] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 307] ioctl(3, SNDRV_TIMER_IOCTL_PARAMS, 0x20000440) = 0 [pid 307] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 4 [pid 307] ioctl(4, SNDRV_TIMER_IOCTL_SELECT, 0x20000100) = 0 [pid 305] <... ioctl resumed>) = 0 [pid 304] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100 [pid 305] ioctl(3, SNDRV_TIMER_IOCTL_CONTINUE, 0 [pid 303] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY [pid 305] <... ioctl resumed>) = 0 [pid 304] <... ioctl resumed>) = 0 [pid 307] ioctl(4, SNDRV_TIMER_IOCTL_START, 0 [pid 305] exit_group(0 [pid 304] ioctl(3, SNDRV_TIMER_IOCTL_PARAMS, 0x20000440 [pid 305] <... exit_group resumed>) = ? [pid 307] <... ioctl resumed>) = 0 [pid 307] ioctl(3, SNDRV_TIMER_IOCTL_CONTINUE, 0) = 0 [pid 307] exit_group(0) = ? [pid 306] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 306] setpgid(0, 0) = 0 [pid 306] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 306] write(3, "1000", 4) = 4 [pid 306] close(3) = 0 [pid 306] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000) = 3 [pid 306] close(3) = 0 [pid 306] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 3 [pid 306] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100 [pid 303] <... openat resumed>) = 3 [pid 303] ioctl(3, SNDRV_TIMER_IOCTL_SELECT, 0x20000100 [pid 304] <... ioctl resumed>) = 0 [pid 304] openat(AT_FDCWD, "/dev/snd/timer", O_RDONLY) = 4 [ 23.115092][ T30] audit: type=1400 audit(1712649736.791:66): avc: denied { execmem } for pid=294 comm="syz-executor303" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [pid 304] ioctl(4, SNDRV_TIMER_IOCTL_SELECT, 0x20000100 [pid 298] kill(-304, SIGKILL [pid 297] kill(-305, SIGKILL [pid 296] kill(-303, SIGKILL [pid 298] <... kill resumed>) = 0 [pid 297] <... kill resumed>) = 0 [pid 296] <... kill resumed>) = 0 [pid 298] kill(304, SIGKILL [pid 297] kill(305, SIGKILL [pid 296] kill(303, SIGKILL [pid 298] <... kill resumed>) = 0 [pid 297] <... kill resumed>) = 0 [pid 296] <... kill resumed>) = 0 [pid 295] kill(-306, SIGKILL) = 0 [pid 295] kill(306, SIGKILL) = 0 [pid 299] kill(-307, SIGKILL) = 0 [pid 299] kill(307, SIGKILL) = 0 [ 123.179290][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 123.187171][ C0] rcu: 1-...0: (1 GPs behind) idle=c5d/1/0x4000000000000000 softirq=2704/2714 fqs=4591 last_accelerate: 937d/ba94 dyntick_enabled: 1 [ 123.200983][ C0] (detected by 0, t=10003 jiffies, g=693, q=2317) [ 123.207384][ C0] Sending NMI from CPU 0 to CPUs 1: [ 123.212851][ C1] NMI backtrace for cpu 1 [ 123.212868][ C1] CPU: 1 PID: 305 Comm: syz-executor303 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0 [ 123.212890][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 123.212901][ C1] RIP: 0010:__kasan_check_write+0x15/0x20 [ 123.212956][ C1] Code: d2 e8 ff ed ff ff 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 89 f6 48 8b 4d 08 ba 01 00 00 00 e8 dc ed ff ff 5d 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 53 49 89 [ 123.212971][ C1] RSP: 0018:ffffc900001d0b18 EFLAGS: 00000056 [ 123.212987][ C1] RAX: 0000000000000001 RBX: 1ffff9200003a16c RCX: ffffffff84c8b69c [ 123.213001][ C1] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88810a61fd38 [ 123.213013][ C1] RBP: ffffc900001d0c00 R08: dffffc0000000000 R09: ffffed10214c3fa8 [ 123.213026][ C1] R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900001d0b60 [ 123.213039][ C1] R13: ffff88810a61fd38 R14: 1ffff9200003a168 R15: dffffc0000000000 [ 123.213053][ C1] FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 123.213068][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 123.213081][ C1] CR2: 00007fa0d0192130 CR3: 000000000680f000 CR4: 00000000003506a0 [ 123.213096][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 123.213125][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 123.213136][ C1] Call Trace: [ 123.213142][ C1] [ 123.213149][ C1] ? show_regs+0x58/0x60 [ 123.213169][ C1] ? nmi_cpu_backtrace+0x29f/0x300 [ 123.213190][ C1] ? nmi_trigger_cpumask_backtrace+0x270/0x270 [ 123.213211][ C1] ? __kasan_check_write+0x15/0x20 [ 123.213229][ C1] ? __kasan_check_write+0x15/0x20 [ 123.213246][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 123.213267][ C1] ? nmi_handle+0xa8/0x280 [ 123.213284][ C1] ? __kasan_check_write+0x15/0x20 [ 123.213302][ C1] ? default_do_nmi+0x69/0x160 [ 123.213321][ C1] ? exc_nmi+0xaf/0x120 [ 123.213337][ C1] ? end_repeat_nmi+0x16/0x31 [ 123.213355][ C1] ? _raw_spin_lock_irqsave+0xec/0x210 [ 123.213375][ C1] ? __kasan_check_write+0x15/0x20 [ 123.213400][ C1] ? __kasan_check_write+0x15/0x20 [ 123.213418][ C1] ? __kasan_check_write+0x15/0x20 [ 123.213436][ C1] [ 123.213441][ C1] [ 123.213445][ C1] ? _raw_spin_lock_irqsave+0xec/0x210 [ 123.213465][ C1] ? _raw_spin_lock+0x1b0/0x1b0 [ 123.213484][ C1] ? snd_timer_user_tinterrupt+0xc90/0xc90 [ 123.213503][ C1] ? snd_timer_process_callbacks+0x2f7/0x310 [ 123.213522][ C1] snd_timer_interrupt+0x22e/0x1050 [ 123.213539][ C1] ? __kasan_check_write+0x14/0x20 [ 123.213556][ C1] ? _raw_spin_lock+0xa4/0x1b0 [ 123.213574][ C1] ? _raw_spin_trylock_bh+0x190/0x190 [ 123.213595][ C1] snd_hrtimer_callback+0x1db/0x330 [ 123.213613][ C1] ? snd_hrtimer_stop+0xa0/0xa0 [ 123.213629][ C1] __hrtimer_run_queues+0x41a/0xad0 [ 123.213650][ C1] ? hrtimer_interrupt+0xaa0/0xaa0 [ 123.213666][ C1] ? clockevents_program_event+0x236/0x300 [ 123.213685][ C1] ? ktime_get_update_offsets_now+0x2ba/0x2d0 [ 123.213705][ C1] hrtimer_interrupt+0x40c/0xaa0 [ 123.213726][ C1] __sysvec_apic_timer_interrupt+0xfd/0x3c0 [ 123.213745][ C1] sysvec_apic_timer_interrupt+0x95/0xc0 [ 123.213764][ C1] [ 123.213768][ C1] [ 123.213773][ C1] asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 123.213795][ C1] RIP: 0010:_raw_spin_unlock_irqrestore+0x57/0x80 [ 123.213816][ C1] Code: 8d 86 e8 5c 76 e9 fc 48 83 3d 0c 99 c4 01 00 74 35 48 89 df e8 8e 28 8c fc 66 90 41 f7 c6 00 02 00 00 74 01 fb bf 01 00 00 00 44 6c 83 fc 65 8b 05 95 b1 39 7b 85 c0 74 05 5b 41 5e 5d c3 e8 [ 123.213829][ C1] RSP: 0018:ffffc90000a57a68 EFLAGS: 00000206 [ 123.213844][ C1] RAX: 0000000000000001 RBX: ffff88810a61fd38 RCX: dffffc0000000000 [ 123.213856][ C1] RDX: 0000000000000000 RSI: 0000000000000246 RDI: 0000000000000001 [ 123.213866][ C1] RBP: ffffc90000a57a78 R08: ffffffff83c281c7 R09: ffffed1023d634ae [ 123.213880][ C1] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810a61fcb0 [ 123.213893][ C1] R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 [ 123.213906][ C1] ? snd_timer_notify1+0x217/0x350 [ 123.213924][ C1] ? _raw_spin_unlock_irqrestore+0x46/0x80 [ 123.213944][ C1] snd_timer_stop1+0x7af/0x8f0 [ 123.213962][ C1] snd_timer_close_locked+0x22e/0x920 [ 123.213980][ C1] snd_timer_user_release+0x121/0x2c0 [ 123.213998][ C1] ? snd_timer_user_open+0x180/0x180 [ 123.214015][ C1] ? percpu_counter_add_batch+0x13d/0x160 [ 123.214033][ C1] ? snd_timer_user_open+0x180/0x180 [ 123.214050][ C1] __fput+0x3fe/0x910 [ 123.214069][ C1] ____fput+0x15/0x20 [ 123.214085][ C1] task_work_run+0x129/0x190 [ 123.214103][ C1] do_exit+0xc48/0x2ca0 [ 123.214122][ C1] ? put_task_struct+0x80/0x80 [ 123.214139][ C1] ? ptrace_notify+0x24c/0x350 [ 123.214158][ C1] ? do_notify_parent+0xa30/0xa30 [ 123.214177][ C1] do_group_exit+0x141/0x310 [ 123.214196][ C1] __x64_sys_exit_group+0x3f/0x40 [ 123.214214][ C1] do_syscall_64+0x3d/0xb0 [ 123.214230][ C1] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 123.214250][ C1] RIP: 0033:0x7fa0d0115df9 [ 123.214264][ C1] Code: Unable to access opcode bytes at RIP 0x7fa0d0115dcf. [ 123.214272][ C1] RSP: 002b:00007fff2598f438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 123.214289][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa0d0115df9 [ 123.214301][ C1] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 123.214312][ C1] RBP: 00007fa0d01912b0 R08: ffffffffffffffb8 R09: 00000000000000a0 [ 123.214324][ C1] R10: 00000000000000a0 R11: 0000000000000246 R12: 00007fa0d01912b0 [ 123.214336][ C1] R13: 0000000000000000 R14: 00007fa0d0191d20 R15: 00007fa0d00e6fa0 [ 123.214351][ C1] [ 123.214357][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.508 msecs