./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3151218294 <...> Warning: Permanently added '10.128.0.206' (ED25519) to the list of known hosts. execve("./syz-executor3151218294", ["./syz-executor3151218294"], 0x7fffb8519b40 /* 10 vars */) = 0 brk(NULL) = 0x555568b07000 brk(0x555568b07d00) = 0x555568b07d00 arch_prctl(ARCH_SET_FS, 0x555568b07380) = 0 set_tid_address(0x555568b07650) = 5847 set_robust_list(0x555568b07660, 24) = 0 rseq(0x555568b07ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3151218294", 4096) = 28 getrandom("\xea\x57\xd1\x36\xfd\x76\xa7\x74", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555568b07d00 brk(0x555568b28d00) = 0x555568b28d00 brk(0x555568b29000) = 0x555568b29000 mprotect(0x7f8805157000, 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 5848 attached [pid 5848] set_robust_list(0x555568b07660, 24) = 0 [pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5847] <... clone resumed>, child_tidptr=0x555568b07650) = 5848 [pid 5848] <... prctl resumed>) = 0 [pid 5848] setpgid(0, 0) = 0 [pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5848] write(3, "1000", 4) = 4 [pid 5848] close(3) = 0 executing program [pid 5848] write(1, "executing program\n", 18) = 18 [pid 5848] memfd_create("syzkaller", 0) = 3 [pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f87fcc00000 [ 97.397998][ T977] cfg80211: failed to load regulatory.db [pid 5848] 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 5848] munmap(0x7f87fcc00000, 138412032) = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5848] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5848] close(3) = 0 [pid 5848] close(4) = 0 [pid 5848] mkdir("./file1", 0777) = 0 [ 97.513572][ T5848] loop0: detected capacity change from 0 to 32768 [pid 5848] mount("/dev/loop0", "./file1", "jfs", 0, "") = 0 [pid 5848] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5848] chdir("./file1") = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5848] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000 [pid 5847] kill(-5848, SIGKILL) = 0 [pid 5847] kill(5848, SIGKILL) = 0 [pid 5847] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5847] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5847] getdents64(3, 0x555568b086f0 /* 2 entries */, 32768) = 48 [pid 5847] getdents64(3, 0x555568b086f0 /* 0 entries */, 32768) = 0 [pid 5847] close(3) = 0 [ 286.837942][ T31] INFO: task kworker/u8:7:3000 blocked for more than 143 seconds. [ 286.846227][ T31] Not tainted 6.16.0-rc7-syzkaller-00034-g25fae0b93d1d #0 [ 286.853982][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.862854][ T31] task:kworker/u8:7 state:D stack:22216 pid:3000 tgid:3000 ppid:2 task_flags:0x4208060 flags:0x00004000 [ 286.875400][ T31] Workqueue: writeback wb_workfn (flush-7:0) [ 286.881629][ T31] Call Trace: [ 286.885068][ T31] [ 286.888226][ T31] __schedule+0x16aa/0x4c90 [ 286.893114][ T31] ? blk_mq_flush_plug_list+0x48b/0x550 [ 286.899483][ T31] ? __pfx_blk_mq_flush_plug_list+0x10/0x10 [ 286.906239][ T31] ? schedule+0x165/0x360 [ 286.911259][ T31] ? __pfx___schedule+0x10/0x10 [ 286.916781][ T31] ? schedule+0x91/0x360 [ 286.921359][ T31] schedule+0x165/0x360 [ 286.925710][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.931755][ T31] __mutex_lock+0x724/0xe80 [ 286.936396][ T31] ? __mutex_lock+0x51b/0xe80 [ 286.941422][ T31] ? jfs_commit_inode+0x1ca/0x530 [ 286.946901][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.952318][ T31] ? metapage_writepages+0xae/0x100 [ 286.957739][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.962652][ T31] jfs_commit_inode+0x1ca/0x530 [ 286.967692][ T31] ? __pfx_jfs_commit_inode+0x10/0x10 [ 286.973173][ T31] jfs_write_inode+0x145/0x220 [ 286.978511][ T31] __writeback_single_inode+0x6f1/0xff0 [ 286.984139][ T31] writeback_sb_inodes+0x6b5/0x1000 [ 286.990845][ T31] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.996769][ T31] ? __pfx___up_read+0x10/0x10 [ 287.001776][ T31] __writeback_inodes_wb+0x111/0x240 [ 287.007270][ T31] wb_writeback+0x44f/0xaf0 [ 287.012019][ T31] ? queue_io+0x341/0x590 [ 287.017036][ T31] ? __pfx_wb_writeback+0x10/0x10 [ 287.022483][ T31] wb_workfn+0xaef/0xef0 [ 287.026845][ T31] ? __pfx_wb_workfn+0x10/0x10 [ 287.031662][ T31] ? __lock_acquire+0xab9/0xd20 [ 287.036707][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 287.042586][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.048235][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 287.054088][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 287.059933][ T31] process_scheduled_works+0xade/0x17b0 [ 287.066697][ T31] ? __pfx_process_scheduled_works+0x10/0x10 [ 287.072863][ T31] worker_thread+0x8a0/0xda0 [ 287.077842][ T31] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 287.084461][ T31] ? __kthread_parkme+0x7b/0x200 [ 287.090090][ T31] kthread+0x711/0x8a0 [ 287.094391][ T31] ? __pfx_worker_thread+0x10/0x10 [ 287.099717][ T31] ? __pfx_kthread+0x10/0x10 [ 287.104789][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.110331][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.115918][ T31] ? __pfx_kthread+0x10/0x10 [ 287.120708][ T31] ret_from_fork+0x3fc/0x770 [ 287.125433][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.130805][ T31] ? __switch_to_asm+0x39/0x70 [ 287.135762][ T31] ? __switch_to_asm+0x33/0x70 [ 287.140792][ T31] ? __pfx_kthread+0x10/0x10 [ 287.145453][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.150668][ T31] [ 287.153992][ T31] [ 287.153992][ T31] Showing all locks held in the system: [ 287.162129][ T31] 1 lock held by khungtaskd/31: [ 287.167237][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 287.177456][ T31] 4 locks held by kworker/u8:7/3000: [ 287.182879][ T31] #0: ffff8881404ea148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 287.194969][ T31] #1: ffffc9000ac17bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 287.208224][ T31] #2: ffff88807b5c00e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 [ 287.219372][ T31] #3: ffff88807653afe0 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530 [ 287.230016][ T31] 2 locks held by getty/5601: [ 287.234744][ T31] #0: ffff8880348020a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.245372][ T31] #1: ffffc900036c42f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.255803][ T31] 4 locks held by syz-executor315/5848: [ 287.261518][ T31] [ 287.263871][ T31] ============================================= [ 287.263871][ T31] [ 287.273123][ T31] NMI backtrace for cpu 0 [ 287.273150][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-00034-g25fae0b93d1d #0 PREEMPT(full) [ 287.273177][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.273190][ T31] Call Trace: [ 287.273198][ T31] [ 287.273208][ T31] dump_stack_lvl+0x189/0x250 [ 287.273237][ T31] ? __wake_up_klogd+0xd9/0x110 [ 287.273269][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.273293][ T31] ? __pfx__printk+0x10/0x10 [ 287.273335][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.273371][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.273400][ T31] ? _printk+0xcf/0x120 [ 287.273440][ T31] ? __pfx__printk+0x10/0x10 [ 287.273469][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.273504][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.273539][ T31] watchdog+0xfee/0x1030 [ 287.273573][ T31] ? watchdog+0x1de/0x1030 [ 287.273613][ T31] kthread+0x711/0x8a0 [ 287.273697][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.273727][ T31] ? __pfx_kthread+0x10/0x10 [ 287.273757][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.273778][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.273798][ T31] ? __pfx_kthread+0x10/0x10 [ 287.273827][ T31] ret_from_fork+0x3fc/0x770 [ 287.273851][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.273877][ T31] ? __switch_to_asm+0x39/0x70 [ 287.273924][ T31] ? __switch_to_asm+0x33/0x70 [ 287.273957][ T31] ? __pfx_kthread+0x10/0x10 [ 287.273986][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.274030][ T31] [ 287.274038][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.436365][ C1] NMI backtrace for cpu 1 [ 287.436384][ C1] CPU: 1 UID: 0 PID: 5848 Comm: syz-executor315 Not tainted 6.16.0-rc7-syzkaller-00034-g25fae0b93d1d #0 PREEMPT(full) [ 287.436409][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.436420][ C1] RIP: 0010:dtSplitRoot+0x783/0x16c0 [ 287.436453][ C1] Code: 0f 85 4f 0e 00 00 44 88 75 00 49 0f be ee 40 0f b6 f5 bf ff 00 00 00 e8 5b d0 84 fe 40 84 ed 78 33 e8 51 cd 84 fe 48 c1 e5 05 <4c> 01 ed 49 89 ed 49 c1 ed 03 43 0f b6 44 25 00 84 c0 75 2b 44 0f [ 287.436470][ C1] RSP: 0018:ffffc9000409f6a8 EFLAGS: 00000246 [ 287.436488][ C1] RAX: ffffffff833b585f RBX: 0000000000000004 RCX: ffff88802c6c9e00 [ 287.436502][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.436513][ C1] RBP: 0000000000000000 R08: 00000000000001ff R09: 0000000000000000 [ 287.436524][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 287.436536][ C1] R13: ffff888011a3d000 R14: 0000000000000000 R15: 1ffff11002347a02 [ 287.436549][ C1] FS: 0000555568b07380(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000 [ 287.436566][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.436578][ C1] CR2: 00007ffed1f8cfb8 CR3: 0000000077f1c000 CR4: 00000000003526f0 [ 287.436596][ C1] Call Trace: [ 287.436606][ C1] [ 287.436634][ C1] dtInsert+0xef8/0x5f40 [ 287.436669][ C1] ? txLockAlloc+0x239/0x380 [ 287.436691][ C1] ? __pfx_txLockAlloc+0x10/0x10 [ 287.436715][ C1] ? do_raw_spin_unlock+0x122/0x240 [ 287.436742][ C1] ? __pfx_dtInsert+0x10/0x10 [ 287.436766][ C1] ? txLock+0xfe0/0x1cb0 [ 287.436790][ C1] ? __pfx_txLock+0x10/0x10 [ 287.436820][ C1] jfs_create+0x6c8/0xa80 [ 287.436853][ C1] ? __pfx_jfs_create+0x10/0x10 [ 287.436896][ C1] ? generic_permission+0x2e5/0x690 [ 287.436926][ C1] ? bpf_lsm_inode_create+0x9/0x20 [ 287.436947][ C1] vfs_create+0x24e/0x400 [ 287.436978][ C1] do_mknodat+0x3c6/0x4d0 [ 287.437006][ C1] ? __pfx_do_mknodat+0x10/0x10 [ 287.437032][ C1] ? getname_flags+0x1e5/0x540 [ 287.437057][ C1] __x64_sys_mknod+0x8c/0xa0 [ 287.437088][ C1] do_syscall_64+0xfa/0x3b0 [ 287.437110][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.437130][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.437149][ C1] ? clear_bhb_loop+0x60/0xb0 [ 287.437171][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.437197][ C1] RIP: 0033:0x7f88050ddb19 [ 287.437226][ 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 [ 287.437242][ C1] RSP: 002b:00007ffdcacfa5b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 [ 287.437261][ C1] RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007f88050ddb19 [ 287.437275][ C1] RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000200000000000 [ 287.437287][ C1] RBP: 00007f88051575f0 R08: 0000000000006204 R09: 0000555568b084c0 [ 287.437300][ C1] R10: 00007ffdcacfa480 R11: 0000000000000246 R12: 00007ffdcacfa5e0 [ 287.437312][ C1] R13: 00007ffdcacfa808 R14: 431bde82d7b634db R15: 00007f880512603b [ 287.437336][ C1] [ 287.437368][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.759968][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-00034-g25fae0b93d1d #0 PREEMPT(full) [ 287.772171][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.782470][ T31] Call Trace: [ 287.785789][ T31] [ 287.788851][ T31] dump_stack_lvl+0x99/0x250 [ 287.793568][ T31] ? __asan_memcpy+0x40/0x70 [ 287.798286][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.803534][ T31] ? __pfx__printk+0x10/0x10 [ 287.808172][ T31] panic+0x2db/0x790 [ 287.812107][ T31] ? __pfx_panic+0x10/0x10 [ 287.816761][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.823250][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.828719][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.835318][ T31] watchdog+0x102d/0x1030 [ 287.839703][ T31] ? watchdog+0x1de/0x1030 [ 287.844356][ T31] kthread+0x711/0x8a0 [ 287.848646][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.853373][ T31] ? __pfx_kthread+0x10/0x10 [ 287.858096][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.863448][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.868679][ T31] ? __pfx_kthread+0x10/0x10 [ 287.873395][ T31] ret_from_fork+0x3fc/0x770 [ 287.878020][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.883280][ T31] ? __switch_to_asm+0x39/0x70 [ 287.888124][ T31] ? __switch_to_asm+0x33/0x70 [ 287.892926][ T31] ? __pfx_kthread+0x10/0x10 [ 287.897808][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.902901][ T31] [ 287.906423][ T31] Kernel Offset: disabled [ 287.910893][ T31] Rebooting in 86400 seconds..