./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3561503415 <...> Warning: Permanently added '10.128.0.161' (ED25519) to the list of known hosts. execve("./syz-executor3561503415", ["./syz-executor3561503415"], 0x7ffd0b65d140 /* 10 vars */) = 0 brk(NULL) = 0x555588e4f000 brk(0x555588e4fd00) = 0x555588e4fd00 arch_prctl(ARCH_SET_FS, 0x555588e4f380) = 0 set_tid_address(0x555588e4f650) = 5838 set_robust_list(0x555588e4f660, 24) = 0 rseq(0x555588e4fca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3561503415", 4096) = 28 getrandom("\xd3\xb0\xda\xe1\x23\x11\x97\x04", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555588e4fd00 brk(0x555588e70d00) = 0x555588e70d00 brk(0x555588e71000) = 0x555588e71000 mprotect(0x7f2254d98000, 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 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 5839 attached , child_tidptr=0x555588e4f650) = 5839 [pid 5839] set_robust_list(0x555588e4f660, 24) = 0 [pid 5839] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5839] setpgid(0, 0) = 0 [pid 5839] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5839] write(3, "1000", 4) = 4 [pid 5839] close(3) = 0 [pid 5839] write(1, "executing program\n", 18executing program ) = 18 [pid 5839] memfd_create("syzkaller", 0) = 3 [pid 5839] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f224c800000 [pid 5839] 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 5839] munmap(0x7f224c800000, 138412032) = 0 [pid 5839] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5839] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5839] close(3) = 0 [pid 5839] close(4) = 0 [pid 5839] mkdir("./bus", 0777) = 0 [pid 5839] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5839] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5839] chdir("./bus") = 0 [pid 5839] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 103.908213][ T5839] loop0: detected capacity change from 0 to 32768 [pid 5839] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000 [pid 5838] kill(-5839, SIGKILL) = 0 [pid 5838] kill(5839, SIGKILL) = 0 [pid 5838] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5838] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5838] getdents64(3, 0x555588e506f0 /* 2 entries */, 32768) = 48 [pid 5838] getdents64(3, 0x555588e506f0 /* 0 entries */, 32768) = 0 [pid 5838] close(3) = 0 [ 286.592165][ T30] INFO: task kworker/u8:6:1134 blocked for more than 143 seconds. [ 286.600404][ T30] Not tainted 6.12.0-syzkaller-00171-g23acd177540d #0 [ 286.610689][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.619788][ T30] task:kworker/u8:6 state:D stack:22768 pid:1134 tgid:1134 ppid:2 flags:0x00004000 [ 286.630440][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 286.636828][ T30] Call Trace: [ 286.640172][ T30] [ 286.643476][ T30] __schedule+0x17fa/0x4bd0 [ 286.648086][ T30] ? __pfx___schedule+0x10/0x10 [ 286.653993][ T30] ? __blk_flush_plug+0x449/0x500 [ 286.659074][ T30] ? __pfx_lock_release+0x10/0x10 [ 286.664559][ T30] ? __mutex_trylock_common+0x92/0x2e0 [ 286.670066][ T30] ? kthread_data+0x52/0xd0 [ 286.675045][ T30] ? schedule+0x90/0x320 [ 286.679340][ T30] ? wq_worker_sleeping+0x66/0x240 [ 286.684878][ T30] ? schedule+0x90/0x320 [ 286.689172][ T30] schedule+0x14b/0x320 [ 286.693795][ T30] schedule_preempt_disabled+0x13/0x30 [ 286.699308][ T30] __mutex_lock+0x6a7/0xd70 [ 286.704349][ T30] ? __mutex_lock+0x52a/0xd70 [ 286.709167][ T30] ? jfs_commit_inode+0x24a/0x590 [ 286.715252][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 286.720348][ T30] jfs_commit_inode+0x24a/0x590 [ 286.725698][ T30] ? __pfx_jfs_commit_inode+0x10/0x10 [ 286.731424][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 286.736770][ T30] jfs_write_inode+0x143/0x220 [ 286.741991][ T30] __writeback_single_inode+0x711/0x10d0 [ 286.747941][ T30] writeback_sb_inodes+0x80c/0x1370 [ 286.753637][ T30] ? mark_lock+0x2ae/0x360 [ 286.758125][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.764240][ T30] ? __pfx___up_read+0x10/0x10 [ 286.769043][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 286.774541][ T30] __writeback_inodes_wb+0x11b/0x260 [ 286.779880][ T30] wb_writeback+0x42f/0xbd0 [ 286.784943][ T30] ? queue_io+0x301/0x5a0 [ 286.789320][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 286.794833][ T30] wb_workfn+0xc58/0x1090 [ 286.799223][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 286.804419][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 286.810460][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 286.817302][ T30] ? process_scheduled_works+0x976/0x1850 [ 286.823887][ T30] process_scheduled_works+0xa63/0x1850 [ 286.829533][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 286.835938][ T30] ? assign_work+0x364/0x3d0 [ 286.840597][ T30] worker_thread+0x870/0xd30 [ 286.845656][ T30] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 286.851910][ T30] ? __kthread_parkme+0x169/0x1d0 [ 286.856994][ T30] ? __pfx_worker_thread+0x10/0x10 [ 286.862556][ T30] kthread+0x2f0/0x390 [ 286.866665][ T30] ? __pfx_worker_thread+0x10/0x10 [ 286.872269][ T30] ? __pfx_kthread+0x10/0x10 [ 286.876904][ T30] ret_from_fork+0x4b/0x80 [ 286.881852][ T30] ? __pfx_kthread+0x10/0x10 [ 286.886486][ T30] ret_from_fork_asm+0x1a/0x30 [ 286.891742][ T30] [ 286.895445][ T30] [ 286.895445][ T30] Showing all locks held in the system: [ 286.903782][ T30] 1 lock held by khungtaskd/30: [ 286.908663][ T30] #0: ffffffff8e939f20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 [ 286.918965][ T30] 4 locks held by kworker/u8:6/1134: [ 286.924559][ T30] #0: ffff8880202bb148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 [ 286.936690][ T30] #1: ffffc90004267d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 [ 286.949537][ T30] #2: ffff888035f9e0e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 [ 286.960409][ T30] #3: ffff88807b3e1d70 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 [ 286.971125][ T30] 2 locks held by getty/5588: [ 286.975830][ T30] #0: ffff8880317cd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.986077][ T30] #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 [ 286.996514][ T30] 4 locks held by syz-executor356/5839: [ 287.002393][ T30] [ 287.004740][ T30] ============================================= [ 287.004740][ T30] [ 287.013683][ T30] NMI backtrace for cpu 0 [ 287.018051][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-00171-g23acd177540d #0 [ 287.028224][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 287.038321][ T30] Call Trace: [ 287.041633][ T30] [ 287.044582][ T30] dump_stack_lvl+0x241/0x360 [ 287.049293][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.054522][ T30] ? __pfx__printk+0x10/0x10 [ 287.059148][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.064125][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.069657][ T30] ? _printk+0xd5/0x120 [ 287.073843][ T30] ? __pfx__printk+0x10/0x10 [ 287.078460][ T30] ? __wake_up_klogd+0xcc/0x110 [ 287.083368][ T30] ? __pfx__printk+0x10/0x10 [ 287.087984][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 287.093041][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.099059][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.105074][ T30] watchdog+0xff4/0x1040 [ 287.109347][ T30] ? watchdog+0x1ea/0x1040 [ 287.113800][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.118505][ T30] kthread+0x2f0/0x390 [ 287.122596][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.127322][ T30] ? __pfx_kthread+0x10/0x10 [ 287.131949][ T30] ret_from_fork+0x4b/0x80 [ 287.136398][ T30] ? __pfx_kthread+0x10/0x10 [ 287.141008][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.145819][ T30] [ 287.149042][ T30] Sending NMI from CPU 0 to CPUs 1: [ 287.154324][ C1] NMI backtrace for cpu 1 [ 287.154337][ C1] CPU: 1 UID: 0 PID: 5839 Comm: syz-executor356 Not tainted 6.12.0-syzkaller-00171-g23acd177540d #0 [ 287.154358][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 287.154380][ C1] RIP: 0010:dtSplitRoot+0x8c0/0x1930 [ 287.154416][ C1] Code: 0f 85 09 0f 00 00 44 88 3b 49 0f be df 0f b6 f3 bf ff 00 00 00 e8 90 2e 69 fe 84 db 78 44 e8 87 2b 69 fe 48 c1 e3 05 4c 01 e3 <49> 89 dc 49 c1 ec 03 43 0f b6 04 2c 84 c0 75 15 44 0f b6 3b 45 84 [ 287.154434][ C1] RSP: 0018:ffffc90003c774a0 EFLAGS: 00000286 [ 287.154449][ C1] RAX: ffffffff832bc489 RBX: ffff888079522000 RCX: ffff88807e90bc00 [ 287.154463][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.154473][ C1] RBP: ffffc90003c77690 R08: ffffffff832bc480 R09: 0000000000000000 [ 287.154484][ C1] R10: 00300065006c0069 R11: 006605ff00000020 R12: ffff888079522000 [ 287.154496][ C1] R13: dffffc0000000000 R14: ffff88807b3e1fd8 R15: 0000000000000000 [ 287.154507][ C1] FS: 0000555588e4f380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 287.154521][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.154533][ C1] CR2: 000055b361612600 CR3: 0000000079548000 CR4: 00000000003526f0 [ 287.154547][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.154556][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.154566][ C1] Call Trace: [ 287.154573][ C1] [ 287.154579][ C1] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.154602][ C1] ? __pfx_lock_acquire+0x10/0x10 [ 287.154628][ C1] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.154648][ C1] ? nmi_handle+0x2a/0x5a0 [ 287.154672][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.154694][ C1] ? nmi_handle+0x14f/0x5a0 [ 287.154710][ C1] ? nmi_handle+0x2a/0x5a0 [ 287.154727][ C1] ? dtSplitRoot+0x8c0/0x1930 [ 287.154744][ C1] ? default_do_nmi+0x63/0x160 [ 287.154766][ C1] ? exc_nmi+0x123/0x1f0 [ 287.154787][ C1] ? end_repeat_nmi+0xf/0x53 [ 287.154805][ C1] ? dtSplitRoot+0x8b0/0x1930 [ 287.154822][ C1] ? dtSplitRoot+0x8b9/0x1930 [ 287.154840][ C1] ? dtSplitRoot+0x8c0/0x1930 [ 287.154859][ C1] ? dtSplitRoot+0x8c0/0x1930 [ 287.154878][ C1] ? dtSplitRoot+0x8c0/0x1930 [ 287.154896][ C1] [ 287.154901][ C1] [ 287.154920][ C1] ? __pfx_dtSplitRoot+0x10/0x10 [ 287.154938][ C1] ? __pfx_dbAlloc+0x10/0x10 [ 287.154954][ C1] ? __kasan_kmalloc+0x98/0xb0 [ 287.154978][ C1] ? dtInsert+0x857/0x6c10 [ 287.154994][ C1] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 287.155015][ C1] dtInsert+0x12cd/0x6c10 [ 287.155049][ C1] ? __pfx_dtInsert+0x10/0x10 [ 287.155070][ C1] ? __pfx_lock_acquire+0x10/0x10 [ 287.155093][ C1] ? txLock+0x2b8/0x1f40 [ 287.155116][ C1] ? __pfx_lock_release+0x10/0x10 [ 287.155139][ C1] ? do_raw_spin_lock+0x14f/0x370 [ 287.155163][ C1] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.155184][ C1] ? dtSearch+0x1d59/0x2520 [ 287.155225][ C1] jfs_create+0x7ba/0xbb0 [ 287.155250][ C1] ? __pfx_jfs_create+0x10/0x10 [ 287.155287][ C1] ? bpf_lsm_inode_create+0x9/0x10 [ 287.155309][ C1] ? security_inode_create+0xbe/0x340 [ 287.155327][ C1] vfs_create+0x23c/0x3d0 [ 287.155350][ C1] do_mknodat+0x447/0x5b0 [ 287.155370][ C1] ? __pfx_do_mknodat+0x10/0x10 [ 287.155389][ C1] ? getname_flags+0x1e3/0x540 [ 287.155407][ C1] __x64_sys_mknod+0x8c/0xa0 [ 287.155429][ C1] do_syscall_64+0xf3/0x230 [ 287.155446][ C1] ? clear_bhb_loop+0x35/0x90 [ 287.155464][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.155489][ C1] RIP: 0033:0x7f2254d1ea59 [ 287.155511][ C1] 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 [ 287.155523][ C1] RSP: 002b:00007ffe32ae47f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 [ 287.155539][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2254d1ea59 [ 287.155550][ C1] RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000000020000000 [ 287.155560][ C1] RBP: 00007f2254d985f0 R08: 0000000000006152 R09: 0000555588e504c0 [ 287.155571][ C1] R10: 00007ffe32ae46c0 R11: 0000000000000246 R12: 00007ffe32ae4820 [ 287.155582][ C1] R13: 00007ffe32ae4a48 R14: 431bde82d7b634db R15: 00007f2254d6703b [ 287.155601][ C1] [ 287.155608][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.285 msecs [ 287.584166][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 287.591039][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-00171-g23acd177540d #0 [ 287.601213][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 287.611287][ T30] Call Trace: [ 287.614591][ T30] [ 287.617546][ T30] dump_stack_lvl+0x241/0x360 [ 287.622257][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.627484][ T30] ? __pfx__printk+0x10/0x10 [ 287.632098][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.638121][ T30] ? vscnprintf+0x5d/0x90 [ 287.642485][ T30] panic+0x349/0x880 [ 287.646406][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.652595][ T30] ? __pfx_panic+0x10/0x10 [ 287.657040][ T30] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.662440][ T30] ? __irq_work_queue_local+0x137/0x410 [ 287.668023][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 287.673418][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.679610][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.685797][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.691986][ T30] watchdog+0x1033/0x1040 [ 287.696357][ T30] ? watchdog+0x1ea/0x1040 [ 287.700812][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.705515][ T30] kthread+0x2f0/0x390 [ 287.709604][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.714310][ T30] ? __pfx_kthread+0x10/0x10 [ 287.718925][ T30] ret_from_fork+0x4b/0x80 [ 287.723371][ T30] ? __pfx_kthread+0x10/0x10 [ 287.727981][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.732790][ T30] [ 287.736145][ T30] Kernel Offset: disabled [ 287.740472][ T30] Rebooting in 86400 seconds..