./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2422449948 <...> Warning: Permanently added '10.128.0.85' (ED25519) to the list of known hosts. execve("./syz-executor2422449948", ["./syz-executor2422449948"], 0x7ffd85b6dbb0 /* 10 vars */) = 0 brk(NULL) = 0x555559fc3000 brk(0x555559fc3d00) = 0x555559fc3d00 arch_prctl(ARCH_SET_FS, 0x555559fc3380) = 0 set_tid_address(0x555559fc3650) = 5824 set_robust_list(0x555559fc3660, 24) = 0 rseq(0x555559fc3ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2422449948", 4096) = 28 getrandom("\xc4\xc3\xef\x82\x81\x8e\xd1\xdc", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555559fc3d00 brk(0x555559fe4d00) = 0x555559fe4d00 brk(0x555559fe5000) = 0x555559fe5000 mprotect(0x7f096d24b000, 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 5826 attached , child_tidptr=0x555559fc3650) = 5826 [pid 5826] set_robust_list(0x555559fc3660, 24) = 0 [pid 5826] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5826] setpgid(0, 0) = 0 [pid 5826] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5826] write(3, "1000", 4) = 4 [pid 5826] close(3executing program ) = 0 [pid 5826] write(1, "executing program\n", 18) = 18 [pid 5826] memfd_create("syzkaller", 0) = 3 [pid 5826] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f0964c00000 [pid 5826] 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 5826] munmap(0x7f0964c00000, 138412032) = 0 [pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5826] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5826] close(3) = 0 [pid 5826] close(4) = 0 [pid 5826] mkdir("./bus", 0777) = 0 [pid 5826] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [ 91.204965][ T5826] loop0: detected capacity change from 0 to 32768 [pid 5826] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5826] chdir("./bus") = 0 [pid 5826] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 92.246654][ T974] cfg80211: failed to load regulatory.db [pid 5826] mkdirat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 01641 [pid 5824] kill(-5826, SIGKILL) = 0 [pid 5824] kill(5826, SIGKILL) = 0 [pid 5824] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5824] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5824] getdents64(3, 0x555559fc46f0 /* 2 entries */, 32768) = 48 [pid 5824] getdents64(3, 0x555559fc46f0 /* 0 entries */, 32768) = 0 [pid 5824] close(3) = 0 [ 286.804519][ T30] INFO: task kworker/u8:5:1093 blocked for more than 143 seconds. [ 286.812569][ T30] Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 [ 286.822250][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.831359][ T30] task:kworker/u8:5 state:D stack:20920 pid:1093 tgid:1093 ppid:2 flags:0x00004000 [ 286.841920][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 286.848398][ T30] Call Trace: [ 286.851714][ T30] [ 286.854942][ T30] __schedule+0x17fb/0x4be0 [ 286.859533][ T30] ? __pfx___schedule+0x10/0x10 [ 286.864924][ T30] ? __blk_flush_plug+0x449/0x500 [ 286.870004][ T30] ? __pfx_lock_release+0x10/0x10 [ 286.875547][ T30] ? kthread_data+0x52/0xd0 [ 286.880098][ T30] ? schedule+0x90/0x320 [ 286.884797][ T30] ? wq_worker_sleeping+0x66/0x240 [ 286.890087][ T30] ? schedule+0x90/0x320 [ 286.894668][ T30] schedule+0x14b/0x320 [ 286.898882][ T30] schedule_preempt_disabled+0x13/0x30 [ 286.904953][ T30] __mutex_lock+0x7e7/0xee0 [ 286.909524][ T30] ? __mutex_lock+0x5ef/0xee0 [ 286.914792][ T30] ? jfs_commit_inode+0x24a/0x590 [ 286.919884][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 286.926023][ T30] jfs_commit_inode+0x24a/0x590 [ 286.930949][ T30] ? __pfx_jfs_commit_inode+0x10/0x10 [ 286.936872][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 286.942142][ T30] jfs_write_inode+0x143/0x220 [ 286.947452][ T30] __writeback_single_inode+0x708/0x10d0 [ 286.953155][ T30] writeback_sb_inodes+0x820/0x1360 [ 286.958866][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.964912][ T30] ? __pfx___up_read+0x10/0x10 [ 286.969734][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 286.975263][ T30] __writeback_inodes_wb+0x11b/0x260 [ 286.980617][ T30] wb_writeback+0x427/0xb80 [ 286.985693][ T30] ? queue_io+0x2e1/0x5a0 [ 286.990514][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 286.996047][ T30] wb_workfn+0xc4b/0x1080 [ 287.000455][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 287.005735][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.011775][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 287.018653][ T30] ? process_scheduled_works+0x976/0x1840 [ 287.024756][ T30] process_scheduled_works+0xa66/0x1840 [ 287.030397][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 287.037427][ T30] ? assign_work+0x364/0x3d0 [ 287.042095][ T30] worker_thread+0x870/0xd30 [ 287.047225][ T30] ? __kthread_parkme+0x169/0x1d0 [ 287.052316][ T30] ? __pfx_worker_thread+0x10/0x10 [ 287.057879][ T30] kthread+0x2f0/0x390 [ 287.062018][ T30] ? __pfx_worker_thread+0x10/0x10 [ 287.067626][ T30] ? __pfx_kthread+0x10/0x10 [ 287.072278][ T30] ret_from_fork+0x4b/0x80 [ 287.077141][ T30] ? __pfx_kthread+0x10/0x10 [ 287.081806][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.087138][ T30] [ 287.090316][ T30] [ 287.090316][ T30] Showing all locks held in the system: [ 287.098668][ T30] 1 lock held by khungtaskd/30: [ 287.103559][ T30] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 [ 287.114020][ T30] 4 locks held by kworker/u8:5/1093: [ 287.120174][ T30] #0: ffff88801ea95948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 [ 287.131846][ T30] #1: ffffc9000414fd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 [ 287.145294][ T30] #2: ffff88804b0120e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x22/0xf0 [ 287.156280][ T30] #3: ffff88807c389d70 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x24a/0x590 [ 287.166985][ T30] 2 locks held by getty/5577: [ 287.171698][ T30] #0: ffff8880358010a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.181977][ T30] #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 [ 287.192455][ T30] 4 locks held by syz-executor242/5826: [ 287.198310][ T30] [ 287.200668][ T30] ============================================= [ 287.200668][ T30] [ 287.209701][ T30] NMI backtrace for cpu 1 [ 287.214085][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 [ 287.224615][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 [ 287.234711][ T30] Call Trace: [ 287.238031][ T30] [ 287.240997][ T30] dump_stack_lvl+0x241/0x360 [ 287.245726][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.250965][ T30] ? __pfx__printk+0x10/0x10 [ 287.255604][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.260588][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.266083][ T30] ? _printk+0xd5/0x120 [ 287.270274][ T30] ? __pfx__printk+0x10/0x10 [ 287.274901][ T30] ? __wake_up_klogd+0xcc/0x110 [ 287.279803][ T30] ? __pfx__printk+0x10/0x10 [ 287.284430][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 287.289500][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.295533][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.301556][ T30] watchdog+0xff6/0x1040 [ 287.305833][ T30] ? watchdog+0x1ea/0x1040 [ 287.310291][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.315025][ T30] kthread+0x2f0/0x390 [ 287.319127][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.323836][ T30] ? __pfx_kthread+0x10/0x10 [ 287.328466][ T30] ret_from_fork+0x4b/0x80 [ 287.332930][ T30] ? __pfx_kthread+0x10/0x10 [ 287.337558][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.342381][ T30] [ 287.345565][ T30] Sending NMI from CPU 1 to CPUs 0: [ 287.350814][ C0] NMI backtrace for cpu 0 [ 287.350836][ C0] CPU: 0 UID: 0 PID: 5826 Comm: syz-executor242 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 [ 287.350857][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 [ 287.350871][ C0] RIP: 0010:dtSplitRoot+0x8e3/0x1930 [ 287.350902][ C0] Code: 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 ff 78 34 e8 f2 26 70 fe 4c 8b 64 24 10 ba 89 d9 80 e1 07 38 c1 7c e2 48 89 df e8 fa fa d3 fe eb d8 e8 [ 287.350916][ C0] RSP: 0018:ffffc90003e9f4a0 EFLAGS: 00000293 [ 287.350934][ C0] RAX: ffffffff832f4cae RBX: ffff88803384a000 RCX: ffff88804b1cda00 [ 287.350948][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.350959][ C0] RBP: ffffc90003e9f690 R08: ffffffff832f4c80 R09: 0000000000000000 [ 287.350971][ C0] R10: 00300065006c0069 R11: 006605ff00000020 R12: ffff88803384a000 [ 287.350985][ C0] R13: dffffc0000000000 R14: ffff88807c389fd8 R15: 0000000000000000 [ 287.350998][ C0] FS: 0000555559fc3380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 287.351013][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.351026][ C0] CR2: 00007f2de7f11580 CR3: 000000007b782000 CR4: 00000000003526f0 [ 287.351042][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.351052][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.351063][ C0] Call Trace: [ 287.351072][ C0] [ 287.351079][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.351102][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.351124][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.351166][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.351193][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.351219][ C0] ? nmi_handle+0x14f/0x5a0 [ 287.351239][ C0] ? nmi_handle+0x2a/0x5a0 [ 287.351259][ C0] ? dtSplitRoot+0x8e3/0x1930 [ 287.351281][ C0] ? default_do_nmi+0x63/0x160 [ 287.351302][ C0] ? exc_nmi+0x123/0x1f0 [ 287.351320][ C0] ? end_repeat_nmi+0xf/0x53 [ 287.351339][ C0] ? dtSplitRoot+0x8b0/0x1930 [ 287.351362][ C0] ? dtSplitRoot+0x8de/0x1930 [ 287.351390][ C0] ? dtSplitRoot+0x8e3/0x1930 [ 287.351414][ C0] ? dtSplitRoot+0x8e3/0x1930 [ 287.351438][ C0] ? dtSplitRoot+0x8e3/0x1930 [ 287.351461][ C0] [ 287.351467][ C0] [ 287.351487][ C0] ? __pfx_dtSplitRoot+0x10/0x10 [ 287.351510][ C0] ? __pfx_dbAlloc+0x10/0x10 [ 287.351531][ C0] ? __kasan_kmalloc+0x98/0xb0 [ 287.351556][ C0] ? __kmalloc_cache_noprof+0x243/0x390 [ 287.351574][ C0] ? dtInsert+0x857/0x6c10 [ 287.351597][ C0] dtInsert+0x12cd/0x6c10 [ 287.351637][ C0] ? __pfx_dtInsert+0x10/0x10 [ 287.351660][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 287.351683][ C0] ? txLock+0x2b3/0x1cf0 [ 287.351700][ C0] ? __pfx_lock_release+0x10/0x10 [ 287.351717][ C0] ? do_raw_spin_lock+0x14f/0x370 [ 287.351748][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.351793][ C0] ? dtInitRoot+0x234/0x6a0 [ 287.351818][ C0] jfs_mkdir+0x7fb/0xba0 [ 287.351847][ C0] ? __pfx_jfs_mkdir+0x10/0x10 [ 287.351890][ C0] ? bpf_lsm_inode_mkdir+0x9/0x10 [ 287.351912][ C0] ? security_inode_mkdir+0xbe/0x340 [ 287.351931][ C0] vfs_mkdir+0x2f9/0x4f0 [ 287.351957][ C0] do_mkdirat+0x264/0x3a0 [ 287.351978][ C0] ? __check_object_size+0x47a/0x730 [ 287.352008][ C0] ? __pfx_do_mkdirat+0x10/0x10 [ 287.352032][ C0] ? getname_flags+0x1e3/0x540 [ 287.352051][ C0] __x64_sys_mkdirat+0x87/0xa0 [ 287.352074][ C0] do_syscall_64+0xf3/0x230 [ 287.352101][ C0] ? clear_bhb_loop+0x35/0x90 [ 287.352119][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.352146][ C0] RIP: 0033:0x7f096d1d1a59 [ 287.352174][ 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 [ 287.352188][ C0] RSP: 002b:00007ffc0c987608 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 287.352206][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f096d1d1a59 [ 287.352219][ C0] RDX: 00000000000003a1 RSI: 0000000020001dc0 RDI: 00000000ffffff9c [ 287.352231][ C0] RBP: 00007f096d24b5f0 R08: 000000000000618e R09: 0000555559fc44c0 [ 287.352243][ C0] R10: 00007ffc0c9874d0 R11: 0000000000000246 R12: 00007ffc0c987630 [ 287.352255][ C0] R13: 00007ffc0c987858 R14: 431bde82d7b634db R15: 00007f096d21a03b [ 287.352276][ C0] [ 287.352284][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.470 msecs [ 287.788221][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 287.795106][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0 [ 287.805626][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 [ 287.815692][ T30] Call Trace: [ 287.818986][ T30] [ 287.821938][ T30] dump_stack_lvl+0x241/0x360 [ 287.826645][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.831869][ T30] ? __pfx__printk+0x10/0x10 [ 287.836474][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.842480][ T30] ? vscnprintf+0x5d/0x90 [ 287.846831][ T30] panic+0x349/0x880 [ 287.850745][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.856917][ T30] ? __pfx_panic+0x10/0x10 [ 287.861350][ T30] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.866750][ T30] ? __irq_work_queue_local+0x137/0x410 [ 287.872313][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 287.877705][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.883879][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.890056][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.896232][ T30] watchdog+0x1035/0x1040 [ 287.900583][ T30] ? watchdog+0x1ea/0x1040 [ 287.905027][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.909718][ T30] kthread+0x2f0/0x390 [ 287.913805][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.918497][ T30] ? __pfx_kthread+0x10/0x10 [ 287.923107][ T30] ret_from_fork+0x4b/0x80 [ 287.927538][ T30] ? __pfx_kthread+0x10/0x10 [ 287.932147][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.936943][ T30] [ 287.940270][ T30] Kernel Offset: disabled [ 287.944642][ T30] Rebooting in 86400 seconds..