./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1154390525 <...> Warning: Permanently added '10.128.0.238' (ED25519) to the list of known hosts. execve("./syz-executor1154390525", ["./syz-executor1154390525"], 0x7ffea48f3ab0 /* 10 vars */) = 0 brk(NULL) = 0x55555e629000 brk(0x55555e629d00) = 0x55555e629d00 arch_prctl(ARCH_SET_FS, 0x55555e629380) = 0 set_tid_address(0x55555e629650) = 5843 set_robust_list(0x55555e629660, 24) = 0 rseq(0x55555e629ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1154390525", 4096) = 28 getrandom("\xa3\xa2\x9b\x21\x49\x46\x34\x2c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555e629d00 brk(0x55555e64ad00) = 0x55555e64ad00 brk(0x55555e64b000) = 0x55555e64b000 mprotect(0x7ffa36893000, 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 5844 attached , child_tidptr=0x55555e629650) = 5844 [pid 5844] set_robust_list(0x55555e629660, 24) = 0 [pid 5844] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5844] setpgid(0, 0) = 0 [pid 5844] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5844] write(3, "1000", 4) = 4 [pid 5844] close(3) = 0 [pid 5844] write(1, "executing program\n", 18executing program ) = 18 [pid 5844] memfd_create("syzkaller", 0) = 3 [pid 5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ffa2e200000 [pid 5844] 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 5844] munmap(0x7ffa2e200000, 138412032) = 0 [pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5844] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5844] close(3) = 0 [pid 5844] close(4) = 0 [pid 5844] mkdir("./file1", 0777) = 0 [pid 5844] mount("/dev/loop0", "./file1", "jfs", 0, "") = 0 [pid 5844] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5844] chdir("./file1") = 0 [pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 81.020213][ T5844] loop0: detected capacity change from 0 to 32768 [pid 5844] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000 [pid 5843] kill(-5844, SIGKILL) = 0 [pid 5843] kill(5844, SIGKILL) = 0 [ 86.850631][ T43] cfg80211: failed to load regulatory.db [pid 5843] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5843] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5843] getdents64(3, 0x55555e62a6f0 /* 2 entries */, 32768) = 48 [pid 5843] getdents64(3, 0x55555e62a6f0 /* 0 entries */, 32768) = 0 [pid 5843] close(3) = 0 [ 286.528809][ T31] INFO: task kworker/u8:0:12 blocked for more than 143 seconds. [ 286.536646][ T31] Not tainted 6.16.0-rc7-syzkaller #0 [ 286.544459][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.553344][ T31] task:kworker/u8:0 state:D stack:20808 pid:12 tgid:12 ppid:2 task_flags:0x4208060 flags:0x00004000 [ 286.565565][ T31] Workqueue: writeback wb_workfn (flush-7:0) [ 286.572029][ T31] Call Trace: [ 286.575346][ T31] [ 286.578404][ T31] __schedule+0x16aa/0x4c90 [ 286.583501][ T31] ? blk_mq_flush_plug_list+0x48b/0x550 [ 286.589242][ T31] ? __pfx_blk_mq_flush_plug_list+0x10/0x10 [ 286.595253][ T31] ? schedule+0x165/0x360 [ 286.599821][ T31] ? __pfx___schedule+0x10/0x10 [ 286.604702][ T31] ? schedule+0x91/0x360 [ 286.609165][ T31] schedule+0x165/0x360 [ 286.613336][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.619049][ T31] __mutex_lock+0x724/0xe80 [ 286.623574][ T31] ? __mutex_lock+0x51b/0xe80 [ 286.628266][ T31] ? jfs_commit_inode+0x1ca/0x530 [ 286.633565][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.638607][ T31] ? metapage_writepages+0xae/0x100 [ 286.644075][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.649532][ T31] jfs_commit_inode+0x1ca/0x530 [ 286.654410][ T31] ? __pfx_jfs_commit_inode+0x10/0x10 [ 286.660140][ T31] jfs_write_inode+0x145/0x220 [ 286.664954][ T31] __writeback_single_inode+0x6f1/0xff0 [ 286.671152][ T31] writeback_sb_inodes+0x6b5/0x1000 [ 286.676614][ T31] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.682669][ T31] ? __pfx___up_read+0x10/0x10 [ 286.687567][ T31] __writeback_inodes_wb+0x111/0x240 [ 286.693151][ T31] wb_writeback+0x44f/0xaf0 [ 286.697691][ T31] ? queue_io+0x341/0x590 [ 286.702291][ T31] ? __pfx_wb_writeback+0x10/0x10 [ 286.707442][ T31] wb_workfn+0xaef/0xef0 [ 286.711999][ T31] ? __pfx_wb_workfn+0x10/0x10 [ 286.716802][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.722019][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 286.727796][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.733356][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 286.739348][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 286.745114][ T31] process_scheduled_works+0xade/0x17b0 [ 286.750939][ T31] ? __pfx_process_scheduled_works+0x10/0x10 [ 286.756994][ T31] worker_thread+0x8a0/0xda0 [ 286.762433][ T31] kthread+0x711/0x8a0 [ 286.766545][ T31] ? __pfx_worker_thread+0x10/0x10 [ 286.771896][ T31] ? __pfx_kthread+0x10/0x10 [ 286.776605][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.782258][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.787491][ T31] ? __pfx_kthread+0x10/0x10 [ 286.792329][ T31] ret_from_fork+0x3fc/0x770 [ 286.796947][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.802455][ T31] ? __switch_to_asm+0x39/0x70 [ 286.807244][ T31] ? __switch_to_asm+0x33/0x70 [ 286.812312][ T31] ? __pfx_kthread+0x10/0x10 [ 286.816928][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.821963][ T31] [ 286.825301][ T31] [ 286.825301][ T31] Showing all locks held in the system: [ 286.833286][ T31] 4 locks held by kworker/u8:0/12: [ 286.838404][ T31] #0: ffff8880212a9148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 286.850237][ T31] #1: ffffc90000117bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 286.863080][ T31] #2: ffff8880359700e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 [ 286.874238][ T31] #3: ffff88807756afe0 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530 [ 286.885534][ T31] 1 lock held by khungtaskd/31: [ 286.890617][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.900893][ T31] 2 locks held by getty/5605: [ 286.905587][ T31] #0: ffff88803148d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.915677][ T31] #1: ffffc900036cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.926001][ T31] 4 locks held by syz-executor115/5844: [ 286.931739][ T31] [ 286.934082][ T31] ============================================= [ 286.934082][ T31] [ 286.942814][ T31] NMI backtrace for cpu 1 [ 286.942835][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(full) [ 286.942855][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.942865][ T31] Call Trace: [ 286.942872][ T31] [ 286.942880][ T31] dump_stack_lvl+0x189/0x250 [ 286.942902][ T31] ? __wake_up_klogd+0xd9/0x110 [ 286.942927][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.942947][ T31] ? __pfx__printk+0x10/0x10 [ 286.942980][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.943008][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.943029][ T31] ? _printk+0xcf/0x120 [ 286.943061][ T31] ? __pfx__printk+0x10/0x10 [ 286.943084][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.943111][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.943138][ T31] watchdog+0xfee/0x1030 [ 286.943164][ T31] ? watchdog+0x1de/0x1030 [ 286.943195][ T31] kthread+0x711/0x8a0 [ 286.943221][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.943243][ T31] ? __pfx_kthread+0x10/0x10 [ 286.943266][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.943291][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.943307][ T31] ? __pfx_kthread+0x10/0x10 [ 286.943329][ T31] ret_from_fork+0x3fc/0x770 [ 286.943349][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.943372][ T31] ? __switch_to_asm+0x39/0x70 [ 286.943391][ T31] ? __switch_to_asm+0x33/0x70 [ 286.943409][ T31] ? __pfx_kthread+0x10/0x10 [ 286.943431][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.943467][ T31] [ 286.943474][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.099022][ C0] NMI backtrace for cpu 0 [ 287.099037][ C0] CPU: 0 UID: 0 PID: 5844 Comm: syz-executor115 Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(full) [ 287.099055][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.099064][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x70 [ 287.099090][ C0] Code: 5b e9 33 20 55 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 90 9c 92 <65> 8b 15 68 6a dc 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 [ 287.099102][ C0] RSP: 0018:ffffc900041cf6a0 EFLAGS: 00000246 [ 287.099117][ C0] RAX: ffffffff833b5886 RBX: 0000000000000004 RCX: ffff88807959bc00 [ 287.099128][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.099137][ C0] RBP: ffff888072f6b000 R08: 00000000000001ff R09: 0000000000000000 [ 287.099147][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 287.099157][ C0] R13: 1ffff1100e5ed600 R14: 0000000000000000 R15: 1ffff1100e5ed602 [ 287.099167][ C0] FS: 000055555e629380(0000) GS:ffff888125c57000(0000) knlGS:0000000000000000 [ 287.099180][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.099191][ C0] CR2: 000055b76c40a5a0 CR3: 0000000072034000 CR4: 00000000003526f0 [ 287.099204][ C0] Call Trace: [ 287.099212][ C0] [ 287.099219][ C0] dtSplitRoot+0x7a6/0x16c0 [ 287.099255][ C0] dtInsert+0xef8/0x5f40 [ 287.099280][ C0] ? txLockAlloc+0x239/0x380 [ 287.099295][ C0] ? __pfx_txLockAlloc+0x10/0x10 [ 287.099314][ C0] ? do_raw_spin_unlock+0x122/0x240 [ 287.099333][ C0] ? __pfx_dtInsert+0x10/0x10 [ 287.099351][ C0] ? txLock+0xfe0/0x1cb0 [ 287.099369][ C0] ? __pfx_txLock+0x10/0x10 [ 287.099391][ C0] jfs_create+0x6c8/0xa80 [ 287.099415][ C0] ? __pfx_jfs_create+0x10/0x10 [ 287.099445][ C0] ? generic_permission+0x2e5/0x690 [ 287.099467][ C0] ? bpf_lsm_inode_create+0x9/0x20 [ 287.099483][ C0] vfs_create+0x24e/0x400 [ 287.099505][ C0] do_mknodat+0x3c6/0x4d0 [ 287.099526][ C0] ? __pfx_do_mknodat+0x10/0x10 [ 287.099545][ C0] ? getname_flags+0x1e5/0x540 [ 287.099562][ C0] __x64_sys_mknod+0x8c/0xa0 [ 287.099583][ C0] do_syscall_64+0xfa/0x3b0 [ 287.099600][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.099615][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.099629][ C0] ? clear_bhb_loop+0x60/0xb0 [ 287.099646][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.099661][ C0] RIP: 0033:0x7ffa36819b19 [ 287.099686][ 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 [ 287.099698][ C0] RSP: 002b:00007ffe0ef33a78 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 [ 287.099712][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffa36819b19 [ 287.099722][ C0] RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000200000000600 [ 287.099732][ C0] RBP: 00007ffa368935f0 R08: 0000000000006204 R09: 000055555e62a4c0 [ 287.099742][ C0] R10: 00007ffe0ef33940 R11: 0000000000000246 R12: 00007ffe0ef33aa0 [ 287.099753][ C0] R13: 00007ffe0ef33cc8 R14: 431bde82d7b634db R15: 00007ffa3686203b [ 287.099771][ C0] [ 287.100080][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.415284][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller #0 PREEMPT(full) [ 287.425349][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.435483][ T31] Call Trace: [ 287.438762][ T31] [ 287.441690][ T31] dump_stack_lvl+0x99/0x250 [ 287.446288][ T31] ? __asan_memcpy+0x40/0x70 [ 287.450878][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.456067][ T31] ? __pfx__printk+0x10/0x10 [ 287.460662][ T31] panic+0x2db/0x790 [ 287.464556][ T31] ? __pfx_panic+0x10/0x10 [ 287.469138][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.474955][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.480422][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.486581][ T31] watchdog+0x102d/0x1030 [ 287.491011][ T31] ? watchdog+0x1de/0x1030 [ 287.495435][ T31] kthread+0x711/0x8a0 [ 287.499508][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.504181][ T31] ? __pfx_kthread+0x10/0x10 [ 287.508784][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.513988][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.519207][ T31] ? __pfx_kthread+0x10/0x10 [ 287.523837][ T31] ret_from_fork+0x3fc/0x770 [ 287.528437][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.533639][ T31] ? __switch_to_asm+0x39/0x70 [ 287.538401][ T31] ? __switch_to_asm+0x33/0x70 [ 287.543156][ T31] ? __pfx_kthread+0x10/0x10 [ 287.547757][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.552527][ T31] [ 287.555798][ T31] Kernel Offset: disabled [ 287.560112][ T31] Rebooting in 86400 seconds..