./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1215262600 <...> Warning: Permanently added '10.128.0.209' (ED25519) to the list of known hosts. execve("./syz-executor1215262600", ["./syz-executor1215262600"], 0x7ffec3c61ea0 /* 10 vars */) = 0 brk(NULL) = 0x555589546000 brk(0x555589546d00) = 0x555589546d00 arch_prctl(ARCH_SET_FS, 0x555589546380) = 0 set_tid_address(0x555589546650) = 5862 set_robust_list(0x555589546660, 24) = 0 rseq(0x555589546ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1215262600", 4096) = 28 getrandom("\xa5\xc0\xc7\xc1\x13\x67\x4e\x35", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555589546d00 brk(0x555589567d00) = 0x555589567d00 brk(0x555589568000) = 0x555589568000 mprotect(0x7f697f643000, 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 5864 attached [pid 5864] set_robust_list(0x555589546660, 24 [pid 5862] <... clone resumed>, child_tidptr=0x555589546650) = 5864 [pid 5864] <... set_robust_list resumed>) = 0 [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5864] setpgid(0, 0) = 0 [pid 5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1000", 4) = 4 [pid 5864] close(3) = 0 executing program [pid 5864] write(1, "executing program\n", 18) = 18 [pid 5864] memfd_create("syzkaller", 0) = 3 [pid 5864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6977000000 [pid 5864] 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 5864] munmap(0x7f6977000000, 138412032) = 0 [pid 5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5864] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5864] close(3) = 0 [pid 5864] close(4) = 0 [pid 5864] mkdir("./bus", 0777) = 0 [pid 5864] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5864] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5864] chdir("./bus") = 0 [pid 5864] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 172.990876][ T5864] loop0: detected capacity change from 0 to 32768 [pid 5864] mkdir("\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 0777 [pid 5862] kill(-5864, SIGKILL) = 0 [pid 5862] kill(5864, SIGKILL) = 0 [pid 5862] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5862] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5862] getdents64(3, 0x5555895476f0 /* 2 entries */, 32768) = 48 [pid 5862] getdents64(3, 0x5555895476f0 /* 0 entries */, 32768) = 0 [pid 5862] close(3) = 0 [ 429.813335][ T31] INFO: task kworker/u8:5:798 blocked for more than 143 seconds. [ 429.821207][ T31] Not tainted 6.16.0-rc5-syzkaller-00038-g733923397fd9 #0 [ 429.829301][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.838439][ T31] task:kworker/u8:5 state:D stack:21992 pid:798 tgid:798 ppid:2 task_flags:0x4208060 flags:0x00004000 [ 429.850932][ T31] Workqueue: writeback wb_workfn (flush-7:0) [ 429.857227][ T31] Call Trace: [ 429.860606][ T31] [ 429.863909][ T31] __schedule+0x16a2/0x4cb0 [ 429.868485][ T31] ? blk_mq_flush_plug_list+0x48b/0x550 [ 429.874385][ T31] ? __pfx_blk_mq_flush_plug_list+0x10/0x10 [ 429.880338][ T31] ? schedule+0x165/0x360 [ 429.884978][ T31] ? __pfx___schedule+0x10/0x10 [ 429.889900][ T31] ? schedule+0x91/0x360 [ 429.894527][ T31] schedule+0x165/0x360 [ 429.898775][ T31] schedule_preempt_disabled+0x13/0x30 [ 429.904647][ T31] __mutex_lock+0x724/0xe80 [ 429.909268][ T31] ? __mutex_lock+0x51b/0xe80 [ 429.914487][ T31] ? jfs_commit_inode+0x1ca/0x530 [ 429.919604][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 429.924983][ T31] ? metapage_writepages+0xae/0x100 [ 429.930252][ T31] ? __lock_acquire+0xab9/0xd20 [ 429.935449][ T31] jfs_commit_inode+0x1ca/0x530 [ 429.940353][ T31] ? __pfx_jfs_commit_inode+0x10/0x10 [ 429.946907][ T31] jfs_write_inode+0x145/0x220 [ 429.951751][ T31] __writeback_single_inode+0x6f1/0xff0 [ 429.957660][ T31] writeback_sb_inodes+0x6b5/0x1000 [ 429.962945][ T31] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 429.968914][ T31] ? __pfx___up_read+0x10/0x10 [ 429.973925][ T31] __writeback_inodes_wb+0x111/0x240 [ 429.979270][ T31] wb_writeback+0x44f/0xaf0 [ 429.984054][ T31] ? queue_io+0x3c1/0x590 [ 429.988440][ T31] ? __pfx_wb_writeback+0x10/0x10 [ 429.993755][ T31] wb_workfn+0xaef/0xef0 [ 429.998063][ T31] ? __pfx_wb_workfn+0x10/0x10 [ 430.002864][ T31] ? __lock_acquire+0xab9/0xd20 [ 430.008132][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 430.014090][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.019333][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 430.025342][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 430.031107][ T31] process_scheduled_works+0xade/0x17b0 [ 430.037079][ T31] ? __pfx_process_scheduled_works+0x10/0x10 [ 430.043357][ T31] worker_thread+0x8a0/0xda0 [ 430.048011][ T31] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 430.055140][ T31] ? __kthread_parkme+0x7b/0x200 [ 430.060167][ T31] kthread+0x711/0x8a0 [ 430.064625][ T31] ? __pfx_worker_thread+0x10/0x10 [ 430.069790][ T31] ? __pfx_kthread+0x10/0x10 [ 430.074738][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.079985][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.085476][ T31] ? __pfx_kthread+0x10/0x10 [ 430.090120][ T31] ret_from_fork+0x3f9/0x770 [ 430.094981][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.100143][ T31] ? __switch_to_asm+0x39/0x70 [ 430.105184][ T31] ? __switch_to_asm+0x33/0x70 [ 430.109994][ T31] ? __pfx_kthread+0x10/0x10 [ 430.114853][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.119687][ T31] [ 430.122844][ T31] [ 430.122844][ T31] Showing all locks held in the system: [ 430.130989][ T31] 1 lock held by khungtaskd/31: [ 430.136055][ T31] #0: ffffffff8e13f160 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.146165][ T31] 4 locks held by kworker/u8:5/798: [ 430.151387][ T31] #0: ffff88801dab0948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 430.163533][ T31] #1: ffffc900032d7bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 430.176739][ T31] #2: ffff88807dd020e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 [ 430.187947][ T31] #3: ffff888076e4afe0 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530 [ 430.198770][ T31] 2 locks held by getty/5594: [ 430.203877][ T31] #0: ffff88814c6340a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.214263][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.224722][ T31] 4 locks held by syz-executor121/5864: [ 430.230304][ T31] [ 430.232663][ T31] ============================================= [ 430.232663][ T31] [ 430.241789][ T31] NMI backtrace for cpu 0 [ 430.241813][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-00038-g733923397fd9 #0 PREEMPT(full) [ 430.241855][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.241882][ T31] Call Trace: [ 430.241890][ T31] [ 430.241898][ T31] dump_stack_lvl+0x189/0x250 [ 430.241925][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.241956][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.241978][ T31] ? __pfx__printk+0x10/0x10 [ 430.242016][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.242045][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.242067][ T31] ? _printk+0xcf/0x120 [ 430.242097][ T31] ? __pfx__printk+0x10/0x10 [ 430.242124][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.242157][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.242185][ T31] watchdog+0xfee/0x1030 [ 430.242216][ T31] ? watchdog+0x1de/0x1030 [ 430.242262][ T31] kthread+0x711/0x8a0 [ 430.242292][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.242319][ T31] ? __pfx_kthread+0x10/0x10 [ 430.242346][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.242373][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.242399][ T31] ? __pfx_kthread+0x10/0x10 [ 430.242426][ T31] ret_from_fork+0x3f9/0x770 [ 430.242449][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.242474][ T31] ? __switch_to_asm+0x39/0x70 [ 430.242497][ T31] ? __switch_to_asm+0x33/0x70 [ 430.242519][ T31] ? __pfx_kthread+0x10/0x10 [ 430.242546][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.242587][ T31] [ 430.242594][ T31] Sending NMI from CPU 0 to CPUs 1: [ 430.400602][ C1] NMI backtrace for cpu 1 [ 430.400619][ C1] CPU: 1 UID: 0 PID: 5864 Comm: syz-executor121 Not tainted 6.16.0-rc5-syzkaller-00038-g733923397fd9 #0 PREEMPT(full) [ 430.400640][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.400651][ C1] RIP: 0010:dtSplitRoot+0x793/0x16c0 [ 430.400677][ C1] Code: b6 f5 bf ff 00 00 00 e8 6b 82 83 fe 40 84 ed 78 33 e8 61 7f 83 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 b6 75 00 45 84 f6 78 34 e8 3a 7f 83 fe 4c 8b 6c [ 430.400691][ C1] RSP: 0018:ffffc900042ff6c8 EFLAGS: 00000a06 [ 430.400707][ C1] RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffff8880270cda00 [ 430.400718][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 430.400728][ C1] RBP: ffff888073992000 R08: 00000000000001ff R09: 0000000000000000 [ 430.400739][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 430.400750][ C1] R13: 1ffff1100e732400 R14: 0000000000000000 R15: 1ffff1100e732402 [ 430.400761][ C1] FS: 0000555589546380(0000) GS:ffff888125d4f000(0000) knlGS:0000000000000000 [ 430.400776][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.400787][ C1] CR2: 0000563841569168 CR3: 0000000030e90000 CR4: 00000000003526f0 [ 430.400802][ C1] Call Trace: [ 430.400810][ C1] [ 430.400835][ C1] dtInsert+0xef8/0x5f40 [ 430.400857][ C1] ? __lock_acquire+0xab9/0xd20 [ 430.400875][ C1] ? txLockAlloc+0x239/0x380 [ 430.400900][ C1] ? __pfx_txLockAlloc+0x10/0x10 [ 430.400932][ C1] ? __pfx_dtInsert+0x10/0x10 [ 430.400947][ C1] ? txLock+0xaf3/0x1cb0 [ 430.400984][ C1] ? dtInitRoot+0x22a/0x670 [ 430.401003][ C1] jfs_mkdir+0x6ec/0xa70 [ 430.401027][ C1] ? __pfx_jfs_mkdir+0x10/0x10 [ 430.401061][ C1] ? generic_permission+0x2e5/0x690 [ 430.401083][ C1] ? bpf_lsm_inode_mkdir+0x9/0x20 [ 430.401109][ C1] vfs_mkdir+0x306/0x510 [ 430.401134][ C1] do_mkdirat+0x247/0x590 [ 430.401156][ C1] ? __pfx_do_mkdirat+0x10/0x10 [ 430.401176][ C1] ? strncpy_from_user+0x150/0x290 [ 430.401201][ C1] ? getname_flags+0x1e5/0x540 [ 430.401219][ C1] __x64_sys_mkdir+0x6c/0x80 [ 430.401241][ C1] do_syscall_64+0xfa/0x3b0 [ 430.401257][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.401287][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.401304][ C1] ? clear_bhb_loop+0x60/0xb0 [ 430.401323][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.401340][ C1] RIP: 0033:0x7f697f5c8ad7 [ 430.401366][ C1] Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 430.401379][ C1] RSP: 002b:00007ffe6ffec4e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 430.401396][ C1] RAX: ffffffffffffffda RBX: 0000200000000280 RCX: 00007f697f5c8ad7 [ 430.401408][ C1] RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000200000000280 [ 430.401418][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 430.401428][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe6ffec580 [ 430.401438][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 430.401456][ C1] [ 430.401774][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.717429][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc5-syzkaller-00038-g733923397fd9 #0 PREEMPT(full) [ 430.729365][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.739457][ T31] Call Trace: [ 430.742774][ T31] [ 430.745720][ T31] dump_stack_lvl+0x99/0x250 [ 430.750331][ T31] ? __asan_memcpy+0x40/0x70 [ 430.754939][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.760155][ T31] ? __pfx__printk+0x10/0x10 [ 430.764778][ T31] panic+0x2db/0x790 [ 430.768697][ T31] ? __pfx_panic+0x10/0x10 [ 430.773127][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.778955][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.784353][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 430.790534][ T31] watchdog+0x102d/0x1030 [ 430.794888][ T31] ? watchdog+0x1de/0x1030 [ 430.799418][ T31] kthread+0x711/0x8a0 [ 430.803593][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.808291][ T31] ? __pfx_kthread+0x10/0x10 [ 430.812905][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.818122][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.823340][ T31] ? __pfx_kthread+0x10/0x10 [ 430.827948][ T31] ret_from_fork+0x3f9/0x770 [ 430.832641][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.837769][ T31] ? __switch_to_asm+0x39/0x70 [ 430.842547][ T31] ? __switch_to_asm+0x33/0x70 [ 430.847328][ T31] ? __pfx_kthread+0x10/0x10 [ 430.851936][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.856738][ T31] [ 430.860112][ T31] Kernel Offset: disabled [ 430.864451][ T31] Rebooting in 86400 seconds..