./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3260333140 <...> Warning: Permanently added '10.128.0.108' (ED25519) to the list of known hosts. execve("./syz-executor3260333140", ["./syz-executor3260333140"], 0x7ffe0d0b38b0 /* 10 vars */) = 0 brk(NULL) = 0x555563c4d000 brk(0x555563c4dd00) = 0x555563c4dd00 arch_prctl(ARCH_SET_FS, 0x555563c4d380) = 0 set_tid_address(0x555563c4d650) = 5859 set_robust_list(0x555563c4d660, 24) = 0 rseq(0x555563c4dca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3260333140", 4096) = 28 getrandom("\x79\x0f\xdc\xef\x36\xd7\x9f\x2a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555563c4dd00 brk(0x555563c6ed00) = 0x555563c6ed00 brk(0x555563c6f000) = 0x555563c6f000 mprotect(0x7efea360c000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5861 attached [pid 5861] set_robust_list(0x555563c4d660, 24 [pid 5859] <... clone resumed>, child_tidptr=0x555563c4d650) = 5861 [pid 5861] <... set_robust_list resumed>) = 0 [pid 5861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5861] setpgid(0, 0) = 0 [pid 5861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "1000", 4) = 4 [pid 5861] close(3) = 0 [pid 5861] write(1, "executing program\n", 18executing program ) = 18 [pid 5861] memfd_create("syzkaller", 0) = 3 [pid 5861] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7efe9b000000 [pid 5861] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216 [pid 5861] munmap(0x7efe9b000000, 138412032) = 0 [pid 5861] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5861] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5861] close(3) = 0 [pid 5861] close(4) = 0 [pid 5861] mkdir("./bus", 0777) = 0 [pid 5861] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5861] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5861] chdir("./bus") = 0 [pid 5861] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 254.386404][ T5861] loop0: detected capacity change from 0 to 32768 [pid 5861] creat("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000 [pid 5859] kill(-5861, SIGKILL) = 0 [pid 5859] kill(5861, SIGKILL) = 0 [pid 5859] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5859] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5859] getdents64(3, 0x555563c4e6f0 /* 2 entries */, 32768) = 48 [pid 5859] getdents64(3, 0x555563c4e6f0 /* 0 entries */, 32768) = 0 [pid 5859] close(3) = 0 [ 429.929382][ T31] INFO: task kworker/u8:1:13 blocked for more than 143 seconds. [ 429.937092][ T31] Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 [ 429.945621][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.955136][ T31] task:kworker/u8:1 state:D stack:20200 pid:13 tgid:13 ppid:2 task_flags:0x4208060 flags:0x00004000 [ 429.967553][ T31] Workqueue: writeback wb_workfn (flush-7:0) [ 429.974023][ T31] Call Trace: [ 429.977342][ T31] [ 429.980704][ T31] __schedule+0x1b33/0x51f0 [ 429.985397][ T31] ? schedule+0x163/0x360 [ 429.990216][ T31] ? __pfx___schedule+0x10/0x10 [ 429.995112][ T31] ? __blk_flush_plug+0x44b/0x500 [ 430.000594][ T31] ? schedule+0x90/0x360 [ 430.004882][ T31] ? schedule+0x90/0x360 [ 430.009158][ T31] schedule+0x163/0x360 [ 430.014462][ T31] ? __mutex_lock+0x5f3/0x10c0 [ 430.019726][ T31] schedule_preempt_disabled+0x13/0x30 [ 430.025234][ T31] __mutex_lock+0x805/0x10c0 [ 430.030278][ T31] ? __mutex_lock+0x5f3/0x10c0 [ 430.035087][ T31] ? jfs_commit_inode+0x2a6/0x600 [ 430.040532][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 430.045590][ T31] ? do_writepages+0x763/0x890 [ 430.050988][ T31] jfs_commit_inode+0x2a6/0x600 [ 430.055879][ T31] ? __pfx_jfs_commit_inode+0x10/0x10 [ 430.062058][ T31] ? do_raw_spin_unlock+0x13c/0x8b0 [ 430.067335][ T31] jfs_write_inode+0x143/0x220 [ 430.072635][ T31] __writeback_single_inode+0x708/0x10d0 [ 430.078330][ T31] writeback_sb_inodes+0x822/0x1360 [ 430.083949][ T31] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 430.090000][ T31] ? __pfx___up_read+0x10/0x10 [ 430.094930][ T31] __writeback_inodes_wb+0x11b/0x260 [ 430.100674][ T31] wb_writeback+0x429/0xb90 [ 430.105234][ T31] ? queue_io+0x361/0x5a0 [ 430.110043][ T31] ? __pfx_wb_writeback+0x10/0x10 [ 430.115138][ T31] wb_workfn+0xbbc/0x10b0 [ 430.119886][ T31] ? __pfx_wb_workfn+0x10/0x10 [ 430.124685][ T31] ? register_lock_class+0x54/0x330 [ 430.130321][ T31] ? __lock_acquire+0xad5/0xd80 [ 430.135244][ T31] ? process_scheduled_works+0x9cb/0x18e0 [ 430.141499][ T31] process_scheduled_works+0xac3/0x18e0 [ 430.147144][ T31] ? __pfx_process_scheduled_works+0x10/0x10 [ 430.153761][ T31] ? assign_work+0x367/0x3d0 [ 430.158409][ T31] worker_thread+0x870/0xd50 [ 430.163491][ T31] ? __kthread_parkme+0x1a8/0x200 [ 430.168570][ T31] ? __pfx_worker_thread+0x10/0x10 [ 430.174729][ T31] kthread+0x7b7/0x940 [ 430.178846][ T31] ? __pfx_worker_thread+0x10/0x10 [ 430.184411][ T31] ? __pfx_kthread+0x10/0x10 [ 430.189033][ T31] ? __pfx_kthread+0x10/0x10 [ 430.194453][ T31] ? __pfx_kthread+0x10/0x10 [ 430.199092][ T31] ? __pfx_kthread+0x10/0x10 [ 430.204154][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.209691][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 430.214921][ T31] ? __pfx_kthread+0x10/0x10 [ 430.220009][ T31] ret_from_fork+0x4b/0x80 [ 430.224512][ T31] ? __pfx_kthread+0x10/0x10 [ 430.229132][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.234625][ T31] [ 430.237859][ T31] [ 430.237859][ T31] Showing all locks held in the system: [ 430.246311][ T31] 4 locks held by kworker/u8:1/13: [ 430.251778][ T31] #0: ffff88802168b948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 [ 430.263381][ T31] #1: ffffc90000127c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 [ 430.276184][ T31] #2: ffff88801284c0e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x22/0xf0 [ 430.287695][ T31] #3: ffff88807b34a6a8 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x2a6/0x600 [ 430.298343][ T31] 1 lock held by khungtaskd/31: [ 430.303539][ T31] #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 [ 430.313816][ T31] 2 locks held by getty/5581: [ 430.318517][ T31] #0: ffff888036b290a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.328859][ T31] #1: ffffc900033262f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 [ 430.339506][ T31] 4 locks held by syz-executor326/5861: [ 430.345102][ T31] [ 430.347439][ T31] ============================================= [ 430.347439][ T31] [ 430.356556][ T31] NMI backtrace for cpu 1 [ 430.356580][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 PREEMPT(full) [ 430.356607][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 430.356620][ T31] Call Trace: [ 430.356629][ T31] [ 430.356638][ T31] dump_stack_lvl+0x241/0x360 [ 430.356677][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.356708][ T31] ? __pfx__printk+0x10/0x10 [ 430.356750][ T31] nmi_cpu_backtrace+0x4ab/0x4e0 [ 430.356788][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.356815][ T31] ? _printk+0xd5/0x120 [ 430.356843][ T31] ? __wake_up_klogd+0xcc/0x110 [ 430.356868][ T31] ? __pfx__printk+0x10/0x10 [ 430.356899][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.356957][ T31] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 430.356990][ T31] watchdog+0x1058/0x10a0 [ 430.357028][ T31] ? watchdog+0x1ea/0x10a0 [ 430.357059][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.357084][ T31] kthread+0x7b7/0x940 [ 430.357109][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.357134][ T31] ? __pfx_kthread+0x10/0x10 [ 430.357154][ T31] ? __pfx_kthread+0x10/0x10 [ 430.357174][ T31] ? __pfx_kthread+0x10/0x10 [ 430.357195][ T31] ? __pfx_kthread+0x10/0x10 [ 430.357216][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.357244][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 430.357264][ T31] ? __pfx_kthread+0x10/0x10 [ 430.357295][ T31] ret_from_fork+0x4b/0x80 [ 430.357312][ T31] ? __pfx_kthread+0x10/0x10 [ 430.357334][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.357381][ T31] [ 430.357389][ T31] Sending NMI from CPU 1 to CPUs 0: [ 430.518701][ C0] NMI backtrace for cpu 0 [ 430.518719][ C0] CPU: 0 UID: 0 PID: 5861 Comm: syz-executor326 Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 PREEMPT(full) [ 430.518739][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 430.518750][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 [ 430.518775][ C0] Code: 8b 3d f4 b7 b5 0c 48 89 de 5b e9 03 36 5c 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 10 65 93 65 8b 15 b8 53 a2 11 81 e2 00 01 ff 00 [ 430.518789][ C0] RSP: 0018:ffffc90004377038 EFLAGS: 00000246 [ 430.518805][ C0] RAX: ffffffff835cf1ab RBX: 0000000000000000 RCX: ffff888060dada00 [ 430.518817][ C0] RDX: ffff888060dada00 RSI: 0000000000000000 RDI: 00000000000000ff [ 430.518827][ C0] RBP: ffffc90004377230 R08: ffffffff835cf1a2 R09: 0000000000000000 [ 430.518839][ C0] R10: 0030000000000000 R11: 000007ff00000020 R12: ffff8880784a0000 [ 430.518851][ C0] R13: dffffc0000000000 R14: ffff88807b34a910 R15: 0000000000000000 [ 430.518863][ C0] FS: 0000555563c4d380(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000 [ 430.518877][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.518888][ C0] CR2: 00007f1418d95ed8 CR3: 00000000778de000 CR4: 00000000003526f0 [ 430.518903][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 430.518912][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 430.518922][ C0] Call Trace: [ 430.518930][ C0] [ 430.518936][ C0] dtSplitRoot+0x8bb/0x1900 [ 430.518980][ C0] ? __pfx_dtSplitRoot+0x10/0x10 [ 430.519005][ C0] ? __pfx_dbAlloc+0x10/0x10 [ 430.519033][ C0] ? __kasan_kmalloc+0x9d/0xb0 [ 430.519090][ C0] ? __kmalloc_cache_noprof+0x236/0x370 [ 430.519111][ C0] ? dtInsert+0x8f6/0x6fa0 [ 430.519136][ C0] dtInsert+0x141d/0x6fa0 [ 430.519169][ C0] ? validate_chain+0x8a7/0x24e0 [ 430.519210][ C0] ? __pfx_dtInsert+0x10/0x10 [ 430.519241][ C0] ? __lock_acquire+0xad5/0xd80 [ 430.519262][ C0] ? txLockAlloc+0x2bf/0x400 [ 430.519285][ C0] ? do_raw_spin_lock+0x151/0x370 [ 430.519307][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 430.519350][ C0] jfs_create+0x7c4/0xbb0 [ 430.519371][ C0] ? __pfx_jfs_create+0x10/0x10 [ 430.519388][ C0] ? __pfx_jfs_lookup+0x10/0x10 [ 430.519416][ C0] ? generic_permission+0x2db/0x680 [ 430.519443][ C0] ? bpf_lsm_inode_create+0x9/0x10 [ 430.519466][ C0] ? security_inode_create+0xbe/0x340 [ 430.519483][ C0] ? __pfx_jfs_create+0x10/0x10 [ 430.519501][ C0] path_openat+0x194b/0x35d0 [ 430.519542][ C0] ? __pfx_path_openat+0x10/0x10 [ 430.519564][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.519605][ C0] do_filp_open+0x284/0x4e0 [ 430.519631][ C0] ? __pfx_do_filp_open+0x10/0x10 [ 430.519653][ C0] ? do_raw_spin_lock+0x151/0x370 [ 430.519691][ C0] do_sys_openat2+0x12b/0x1d0 [ 430.519714][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.519739][ C0] ? __pfx_do_sys_openat2+0x10/0x10 [ 430.519762][ C0] ? ptrace_notify+0x282/0x390 [ 430.519790][ C0] __x64_sys_creat+0x124/0x170 [ 430.519814][ C0] ? __pfx___x64_sys_creat+0x10/0x10 [ 430.519846][ C0] do_syscall_64+0xf3/0x210 [ 430.519864][ C0] ? clear_bhb_loop+0x45/0xa0 [ 430.519883][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.519899][ C0] RIP: 0033:0x7efea3592a99 [ 430.519920][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 [ 430.519933][ C0] RSP: 002b:00007ffd180b4fc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 430.519950][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efea3592a99 [ 430.519962][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000e00 [ 430.519972][ C0] RBP: 00007efea360c5f0 R08: 00000000000061c0 R09: 0000555563c4e4c0 [ 430.519983][ C0] R10: 00007ffd180b4e90 R11: 0000000000000246 R12: 00007ffd180b4ff0 [ 430.519994][ C0] R13: 00007ffd180b5218 R14: 431bde82d7b634db R15: 00007efea35db03b [ 430.520015][ C0] [ 430.520022][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.323 msecs [ 430.520762][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.520780][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00001-g9d7a0577c9db #0 PREEMPT(full) [ 430.520808][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 430.520822][ T31] Call Trace: [ 430.520832][ T31] [ 430.520842][ T31] dump_stack_lvl+0x241/0x360 [ 430.520879][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.520911][ T31] ? __pfx__printk+0x10/0x10 [ 430.520947][ T31] ? vscnprintf+0x5d/0x90 [ 430.520979][ T31] panic+0x349/0x880 [ 430.521007][ T31] ? __pfx_preempt_schedule+0x10/0x10 [ 430.521041][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 430.521074][ T31] ? __pfx_panic+0x10/0x10 [ 430.521098][ T31] ? tick_nohz_tick_stopped+0x82/0xb0 [ 430.521155][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.521179][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 430.521211][ T31] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 430.521245][ T31] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 430.521287][ T31] watchdog+0x1097/0x10a0 [ 430.521317][ T31] ? watchdog+0x1ea/0x10a0 [ 430.521349][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.521377][ T31] kthread+0x7b7/0x940 [ 430.521404][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.521432][ T31] ? __pfx_kthread+0x10/0x10 [ 430.521454][ T31] ? __pfx_kthread+0x10/0x10 [ 430.521477][ T31] ? __pfx_kthread+0x10/0x10 [ 430.521502][ T31] ? __pfx_kthread+0x10/0x10 [ 430.521525][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.521556][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 430.521578][ T31] ? __pfx_kthread+0x10/0x10 [ 430.521604][ T31] ret_from_fork+0x4b/0x80 [ 430.521625][ T31] ? __pfx_kthread+0x10/0x10 [ 430.521650][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.521701][ T31] [ 431.095031][ T31] Kernel Offset: disabled [ 431.099377][ T31] Rebooting in 86400 seconds..