./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2884191351 <...> DUID 00:04:dd:0f:a4:e5:cb:b8:04:95:2f:30:92:03:b3:b6:0d:bc forked to background, child pid 4646 [ 30.550943][ T4647] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.561242][ T4647] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.7' (ECDSA) to the list of known hosts. execve("./syz-executor2884191351", ["./syz-executor2884191351"], 0x7ffd2407cf30 /* 10 vars */) = 0 brk(NULL) = 0x5555574a7000 brk(0x5555574a7c40) = 0x5555574a7c40 arch_prctl(ARCH_SET_FS, 0x5555574a7300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2884191351", 4096) = 28 brk(0x5555574c8c40) = 0x5555574c8c40 brk(0x5555574c9000) = 0x5555574c9000 mprotect(0x7f62c0134000, 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, child_tidptr=0x5555574a75d0) = 5068 ./strace-static-x86_64: Process 5068 attached [pid 5068] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5068] setpgid(0, 0) = 0 [pid 5068] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5068] write(3, "1000", 4) = 4 [pid 5068] close(3) = 0 [pid 5068] memfd_create("syzkaller", 0) = 3 [pid 5068] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f62b7c79000 [pid 5068] 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"..., 1048576) = 1048576 [pid 5068] munmap(0x7f62b7c79000, 1048576) = 0 [pid 5068] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5068] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5068] close(3) = 0 [pid 5068] mkdir("./file0", 0777) = 0 syzkaller login: [ 51.334659][ T5068] loop0: detected capacity change from 0 to 2048 [ 51.362535][ T5068] EXT4-fs (loop0): warning: checktime reached, running e2fsck is recommended [pid 5068] mount("/dev/loop0", "./file0", "ext4", MS_DIRSYNC, ",errors=continue") = 0 [pid 5068] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5068] chdir("./file0") = 0 [pid 5068] ioctl(4, LOOP_CLR_FD) = 0 [pid 5068] close(4) = 0 [pid 5068] chdir("./file0") = 0 [pid 5068] open(".", O_RDONLY) = 4 [ 51.374551][ T5068] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. [pid 5068] mkdirat(4, "\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", 000 [pid 5067] kill(-5068, SIGKILL) = 0 [pid 5067] kill(5068, SIGKILL) = 0 [pid 5067] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5067] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5067] getdents64(3, 0x5555574a8620 /* 2 entries */, 32768) = 48 [pid 5067] getdents64(3, 0x5555574a8620 /* 0 entries */, 32768) = 0 [pid 5067] close(3) = 0 [ 76.182237][ T26] cfg80211: failed to load regulatory.db [ 286.100876][ T28] INFO: task syz-executor288:5068 blocked for more than 143 seconds. [ 286.109109][ T28] Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 [ 286.116466][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.125266][ T28] task:syz-executor288 state:D stack:19808 pid:5068 ppid:5067 flags:0x00004004 [ 286.134547][ T28] Call Trace: [ 286.137828][ T28] [ 286.140834][ T28] __schedule+0x995/0xe20 [ 286.145300][ T28] ? release_firmware_map_entry+0x180/0x180 [ 286.151367][ T28] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.156644][ T28] ? lockdep_hardirqs_on+0x8d/0x130 [ 286.161956][ T28] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 286.167858][ T28] ? _raw_spin_unlock+0x40/0x40 [ 286.172750][ T28] schedule+0xcb/0x190 [ 286.176826][ T28] io_schedule+0x83/0x100 [ 286.181211][ T28] bit_wait_io+0xe/0xc0 [ 286.185374][ T28] __wait_on_bit_lock+0xbb/0x1a0 [ 286.190303][ T28] ? bit_wait+0xc0/0xc0 [ 286.194498][ T28] out_of_line_wait_on_bit_lock+0x1c3/0x240 [ 286.200402][ T28] ? bit_wait+0xc0/0xc0 [ 286.204621][ T28] ? __wait_on_bit_lock+0x1a0/0x1a0 [ 286.209839][ T28] ? bit_waitqueue+0x30/0x30 [ 286.214498][ T28] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.219707][ T28] __sync_dirty_buffer+0x107/0x330 [ 286.225411][ T28] __ext4_handle_dirty_metadata+0x29a/0x810 [ 286.231436][ T28] ext4_handle_dirty_dirblock+0x363/0x6b0 [ 286.237207][ T28] ? ext4_has_metadata_csum+0x1c0/0x1c0 [ 286.242806][ T28] ? memcpy+0x3c/0x60 [ 286.246869][ T28] ? ext4_init_dot_dotdot+0x31c/0x510 [ 286.252299][ T28] ? ext4_finish_convert_inline_dir+0xf2/0x700 [ 286.258470][ T28] ext4_finish_convert_inline_dir+0x58a/0x700 [ 286.264611][ T28] ext4_convert_inline_data_nolock+0x639/0x820 [ 286.270813][ T28] ? ext4_add_dirent_to_inline+0x450/0x450 [ 286.276614][ T28] ? get_max_inline_xattr_value_size+0x3f8/0x510 [ 286.282992][ T28] ext4_try_add_inline_entry+0x683/0x990 [ 286.288633][ T28] ? ext4_fname_setup_filename+0x1ba/0x2a0 [ 286.294538][ T28] ? ext4_da_convert_inline_data_to_extent+0xa30/0xa30 [ 286.301434][ T28] ? ext4_try_create_inline_dir+0x27c/0x320 [ 286.307363][ T28] ext4_add_entry+0x5a4/0xeb0 [ 286.312081][ T28] ? ext4_inc_count+0x190/0x190 [ 286.316937][ T28] ? ext4_init_new_dir+0x557/0x670 [ 286.322117][ T28] ? ext4_init_dot_dotdot+0x510/0x510 [ 286.327506][ T28] ext4_mkdir+0x557/0xcf0 [ 286.331883][ T28] ? ext4_symlink+0xbf0/0xbf0 [ 286.336565][ T28] ? inode_permission+0xf5/0x450 [ 286.341617][ T28] ? bpf_lsm_inode_mkdir+0x5/0x10 [ 286.346690][ T28] ? security_inode_mkdir+0xdd/0x120 [ 286.352076][ T28] vfs_mkdir+0x3b3/0x590 [ 286.356351][ T28] do_mkdirat+0x25b/0x530 [ 286.360768][ T28] ? __check_object_size+0x15a/0x210 [ 286.366128][ T28] ? vfs_mkdir+0x590/0x590 [ 286.370535][ T28] ? getname_flags+0x1ea/0x4e0 [ 286.375352][ T28] __x64_sys_mkdirat+0x85/0x90 [ 286.380134][ T28] do_syscall_64+0x3d/0xb0 [ 286.384614][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.390591][ T28] RIP: 0033:0x7f62c00c6229 [ 286.395035][ T28] RSP: 002b:00007ffdfdcc6ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 286.403493][ T28] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f62c00c6229 [ 286.411579][ T28] RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000004 [ 286.419556][ T28] RBP: 0000000000000000 R08: 00007f62c0134ec0 R09: 00007f62c0134ec0 [ 286.427576][ T28] R10: 00007f62c0134ec0 R11: 0000000000000246 R12: 00007ffdfdcc6f10 [ 286.435576][ T28] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 286.443618][ T28] [ 286.446659][ T28] [ 286.446659][ T28] Showing all locks held in the system: [ 286.454416][ T28] 1 lock held by rcu_tasks_kthre/12: [ 286.459703][ T28] #0: ffffffff8d326e90 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.470262][ T28] 1 lock held by rcu_tasks_trace/13: [ 286.475581][ T28] #0: ffffffff8d327690 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.486621][ T28] 1 lock held by khungtaskd/28: [ 286.491514][ T28] #0: ffffffff8d326cc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 286.500960][ T28] 1 lock held by klogd/4423: [ 286.505548][ T28] #0: ffff8880b993a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 [ 286.515587][ T28] 2 locks held by getty/4746: [ 286.520261][ T28] #0: ffff88814a3fe098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 [ 286.530106][ T28] #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 [ 286.540265][ T28] 3 locks held by syz-executor288/5068: [ 286.545863][ T28] #0: ffff8880297ce460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 [ 286.555123][ T28] #1: ffff8880787b0e08 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x22a/0x4f0 [ 286.565842][ T28] #2: ffff8880787b0ad0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xe1/0x990 [ 286.576345][ T28] [ 286.578687][ T28] ============================================= [ 286.578687][ T28] [ 286.587320][ T28] NMI backtrace for cpu 1 [ 286.591656][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 [ 286.601092][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 286.611149][ T28] Call Trace: [ 286.614413][ T28] [ 286.617331][ T28] dump_stack_lvl+0x1b1/0x290 [ 286.622003][ T28] ? nf_tcp_handle_invalid+0x630/0x630 [ 286.627449][ T28] ? panic+0x710/0x710 [ 286.631523][ T28] ? tick_nohz_tick_stopped+0x76/0xb0 [ 286.636954][ T28] ? nmi_cpu_backtrace+0x205/0x4f0 [ 286.642060][ T28] nmi_cpu_backtrace+0x46f/0x4f0 [ 286.646984][ T28] ? vprintk_emit+0x109/0x1e0 [ 286.651681][ T28] ? nmi_trigger_cpumask_backtrace+0x420/0x420 [ 286.657818][ T28] ? _printk+0xc0/0x100 [ 286.661956][ T28] ? panic+0x710/0x710 [ 286.666092][ T28] ? __wake_up_klogd+0xcd/0x100 [ 286.670937][ T28] ? panic+0x710/0x710 [ 286.675009][ T28] ? nmi_trigger_cpumask_backtrace+0xc9/0x420 [ 286.681063][ T28] nmi_trigger_cpumask_backtrace+0x1ba/0x420 [ 286.687028][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 286.693117][ T28] watchdog+0xcd5/0xd20 [ 286.697272][ T28] kthread+0x266/0x300 [ 286.701360][ T28] ? hungtask_pm_notify+0x50/0x50 [ 286.706373][ T28] ? kthread_blkcg+0xd0/0xd0 [ 286.710956][ T28] ret_from_fork+0x1f/0x30 [ 286.715384][ T28] [ 286.718489][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.723752][ C0] NMI backtrace for cpu 0 [ 286.723761][ C0] CPU: 0 PID: 56 Comm: kworker/u4:4 Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 [ 286.723775][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 286.723783][ C0] Workqueue: events_unbound toggle_allocation_gate [ 286.723803][ C0] RIP: 0010:dequeue_task_fair+0x10c0/0x12a0 [ 286.723855][ C0] Code: 8c 6c fb ff ff 4c 89 f7 49 89 f5 e8 ca 62 7e 00 4c 89 ee 48 ba 00 00 00 00 00 fc ff df e9 4f fb ff ff 48 8d 8c 24 d0 00 00 00 <80> e1 07 80 c1 03 38 c1 0f 8c 47 fb ff ff 48 8d bc 24 d0 00 00 00 [ 286.723865][ C0] RSP: 0018:ffffc90001577880 EFLAGS: 00000002 [ 286.723875][ C0] RAX: 1ffff110031cb004 RBX: 0000000080000038 RCX: ffffc90001577950 [ 286.723885][ C0] RDX: dffffc0000000000 RSI: 1ffff920002aef2a RDI: ffff8880b983a29c [ 286.723894][ C0] RBP: ffffc900015779d0 R08: ffffffff813fadcf R09: fffffbfff1d2ccfe [ 286.723903][ C0] R10: fffffbfff1d2ccfe R11: 1ffffffff1d2ccfd R12: ffff888018e58080 [ 286.723911][ C0] R13: 00000000ffffff68 R14: ffff888018e58178 R15: ffff888018e5817c [ 286.723921][ C0] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 286.723931][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.723940][ C0] CR2: 000056340c1b0000 CR3: 000000000d08e000 CR4: 00000000003506f0 [ 286.723952][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.723959][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.723967][ C0] Call Trace: [ 286.723971][ C0] [ 286.723980][ C0] ? psi_account_irqtime+0x464/0x730 [ 286.724000][ C0] ? enqueue_task_fair+0xee0/0xee0 [ 286.724018][ C0] __schedule+0x406/0xe20 [ 286.724036][ C0] ? release_firmware_map_entry+0x180/0x180 [ 286.724048][ C0] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 286.724066][ C0] ? _raw_spin_unlock+0x40/0x40 [ 286.724082][ C0] ? __might_sleep+0xc0/0xc0 [ 286.724098][ C0] ? rcu_read_lock_any_held+0xb1/0x130 [ 286.724114][ C0] ? wq_worker_sleeping+0x5e/0x290 [ 286.724172][ C0] schedule+0xcb/0x190 [ 286.724185][ C0] toggle_allocation_gate+0x15a/0x240 [ 286.724199][ C0] ? virt_to_slab+0x2c0/0x2c0 [ 286.724212][ C0] ? rcu_read_lock_sched_held+0x87/0x110 [ 286.724226][ C0] ? wake_bit_function+0x240/0x240 [ 286.724241][ C0] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.724262][ C0] process_one_work+0x877/0xdb0 [ 286.724285][ C0] ? worker_detach_from_pool+0x260/0x260 [ 286.724303][ C0] ? _raw_spin_lock_irq+0xba/0xf0 [ 286.724319][ C0] ? _raw_spin_lock_irqsave+0x100/0x100 [ 286.724340][ C0] worker_thread+0xb14/0x1330 [ 286.724368][ C0] kthread+0x266/0x300 [ 286.724381][ C0] ? rcu_lock_release+0x20/0x20 [ 286.724396][ C0] ? kthread_blkcg+0xd0/0xd0 [ 286.724415][ C0] ret_from_fork+0x1f/0x30 [ 286.724438][ C0] [ 286.724751][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 287.001493][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 [ 287.010945][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 287.020989][ T28] Call Trace: [ 287.024268][ T28] [ 287.027195][ T28] dump_stack_lvl+0x1b1/0x290 [ 287.031879][ T28] ? nf_tcp_handle_invalid+0x630/0x630 [ 287.037336][ T28] ? panic+0x710/0x710 [ 287.041425][ T28] ? vscnprintf+0x59/0x80 [ 287.045773][ T28] panic+0x2d6/0x710 [ 287.049674][ T28] ? schedule_preempt_disabled+0x20/0x20 [ 287.055312][ T28] ? nmi_trigger_cpumask_backtrace+0x2d0/0x420 [ 287.061469][ T28] ? memcpy_page_flushcache+0x100/0x100 [ 287.067018][ T28] ? nmi_trigger_cpumask_backtrace+0x2d0/0x420 [ 287.073177][ T28] ? nmi_trigger_cpumask_backtrace+0x34e/0x420 [ 287.079336][ T28] ? nmi_trigger_cpumask_backtrace+0x353/0x420 [ 287.085492][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 287.091557][ T28] watchdog+0xd15/0xd20 [ 287.095729][ T28] kthread+0x266/0x300 [ 287.099797][ T28] ? hungtask_pm_notify+0x50/0x50 [ 287.104822][ T28] ? kthread_blkcg+0xd0/0xd0 [ 287.109414][ T28] ret_from_fork+0x1f/0x30 [ 287.113840][ T28] [ 287.117057][ T28] Kernel Offset: disabled [ 287.121375][ T28] Rebooting in 86400 seconds..