./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2154048666 <...> DUID 00:04:e6:d8:3e:4c:c1:15:84:42:dc:00:60:8c:e3:5f:26:b4 forked to background, child pid 4639 [ 42.088285][ T4640] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.111238][ T4640] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.10.24' (ECDSA) to the list of known hosts. execve("./syz-executor2154048666", ["./syz-executor2154048666"], 0x7ffec7ab4ff0 /* 10 vars */) = 0 brk(NULL) = 0x5555567c6000 brk(0x5555567c6c40) = 0x5555567c6c40 arch_prctl(ARCH_SET_FS, 0x5555567c6300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2154048666", 4096) = 28 brk(0x5555567e7c40) = 0x5555567e7c40 brk(0x5555567e8000) = 0x5555567e8000 mprotect(0x7f0687e96000, 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=0x5555567c65d0) = 5071 ./strace-static-x86_64: Process 5071 attached [pid 5071] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5071] setpgid(0, 0) = 0 [pid 5071] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5071] write(3, "1000", 4) = 4 [pid 5071] close(3) = 0 [pid 5071] memfd_create("syzkaller", 0) = 3 [pid 5071] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f067f9db000 [pid 5071] 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 5071] munmap(0x7f067f9db000, 1048576) = 0 [pid 5071] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5071] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5071] close(3) = 0 [pid 5071] mkdir("./file0", 0777) = 0 syzkaller login: [ 69.993608][ T5071] loop0: detected capacity change from 0 to 2048 [ 70.005840][ T5071] ======================================================= [ 70.005840][ T5071] WARNING: The mand mount option has been deprecated and [ 70.005840][ T5071] and is ignored by this kernel. Remove the mand [ 70.005840][ T5071] option from the mount to silence this warning. [ 70.005840][ T5071] ======================================================= [pid 5071] mount("/dev/loop0", "./file0", "ext4", MS_MANDLOCK|MS_DIRSYNC|MS_NOATIME, ",errors=continue") = 0 [pid 5071] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5071] chdir("./file0") = 0 [pid 5071] ioctl(4, LOOP_CLR_FD) = 0 [pid 5071] close(4) = 0 [pid 5071] chdir("./file0") = 0 [pid 5071] open(".", O_RDONLY) = 4 [pid 5071] creat(NULL, 0117453) = -1 EFAULT (Bad address) [ 70.051915][ T5071] EXT4-fs (loop0): warning: checktime reached, running e2fsck is recommended [ 70.064180][ T5071] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. [pid 5071] 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 5070] kill(-5071, SIGKILL) = 0 [pid 5070] kill(5071, SIGKILL) = 0 [pid 5070] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5070] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5070] getdents64(3, 0x5555567c7620 /* 2 entries */, 32768) = 48 [pid 5070] getdents64(3, 0x5555567c7620 /* 0 entries */, 32768) = 0 [pid 5070] close(3) = 0 [ 81.440879][ T7] cfg80211: failed to load regulatory.db [ 286.238893][ T28] INFO: task syz-executor215:5071 blocked for more than 143 seconds. [ 286.247176][ T28] Not tainted 6.2.0-rc8-syzkaller-00151-g925cf0457d7e #0 [ 286.254895][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.263700][ T28] task:syz-executor215 state:D stack:23616 pid:5071 ppid:5070 flags:0x00004004 [ 286.273072][ T28] Call Trace: [ 286.276389][ T28] [ 286.279395][ T28] __schedule+0x1409/0x43f0 [ 286.284138][ T28] ? mark_lock+0x9a/0x340 [ 286.288520][ T28] ? release_firmware_map_entry+0x190/0x190 [ 286.294522][ T28] ? do_raw_spin_unlock+0x13b/0x8b0 [ 286.299807][ T28] ? lockdep_hardirqs_on+0x98/0x140 [ 286.305060][ T28] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 286.311042][ T28] ? _raw_spin_unlock+0x40/0x40 [ 286.316045][ T28] schedule+0xc3/0x190 [ 286.320277][ T28] io_schedule+0x8c/0x100 [ 286.324683][ T28] bit_wait_io+0x12/0xc0 [ 286.329215][ T28] __wait_on_bit_lock+0xbd/0x1a0 [ 286.334209][ T28] ? bit_wait+0xc0/0xc0 [ 286.338392][ T28] out_of_line_wait_on_bit_lock+0x1d4/0x250 [ 286.344384][ T28] ? bit_wait+0xc0/0xc0 [ 286.348884][ T28] ? __wait_on_bit_lock+0x1a0/0x1a0 [ 286.354128][ T28] ? bit_waitqueue+0x30/0x30 [ 286.358929][ T28] __sync_dirty_buffer+0x120/0x380 [ 286.364145][ T28] __ext4_handle_dirty_metadata+0x2a6/0x820 [ 286.370211][ T28] ext4_handle_dirty_dirblock+0x362/0x6f0 [ 286.376020][ T28] ? ext4_has_metadata_csum+0x1c0/0x1c0 [ 286.381696][ T28] ? memcpy+0x40/0x70 [ 286.385807][ T28] ? ext4_init_dot_dotdot+0x31a/0x4f0 [ 286.391321][ T28] ? ext4_finish_convert_inline_dir+0xf6/0x6f0 [ 286.397533][ T28] ext4_finish_convert_inline_dir+0x57b/0x6f0 [ 286.403743][ T28] ext4_convert_inline_data_nolock+0xa01/0xd80 [ 286.410151][ T28] ? ext4_add_dirent_to_inline+0x4f0/0x4f0 [ 286.416031][ T28] ? get_max_inline_xattr_value_size+0x3f4/0x510 [ 286.422571][ T28] ext4_try_add_inline_entry+0x809/0xb70 [ 286.428292][ T28] ? ext4_da_write_inline_data_begin+0xe40/0xe40 [ 286.434804][ T28] ? ext4_try_create_inline_dir+0x27a/0x320 [ 286.440917][ T28] ext4_add_entry+0x535/0x1010 [ 286.445754][ T28] ? ext4_blocks_for_truncate+0x270/0x270 [ 286.451665][ T28] ? ext4_inc_count+0x190/0x190 [ 286.456612][ T28] ? ext4_init_dot_dotdot+0x4f0/0x4f0 [ 286.462196][ T28] ? smack_inode_permission+0x2dc/0x380 [ 286.467889][ T28] ext4_mkdir+0x553/0xce0 [ 286.472403][ T28] ? ext4_symlink+0xb30/0xb30 [ 286.477158][ T28] ? bpf_lsm_inode_mkdir+0x9/0x10 [ 286.482378][ T28] ? security_inode_mkdir+0xb8/0x100 [ 286.488016][ T28] vfs_mkdir+0x3ba/0x590 [ 286.492472][ T28] do_mkdirat+0x246/0x500 [ 286.496871][ T28] ? vfs_mkdir+0x590/0x590 [ 286.501426][ T28] ? getname_flags+0x1f0/0x4e0 [ 286.506270][ T28] __x64_sys_mkdirat+0x89/0xa0 [ 286.511184][ T28] do_syscall_64+0x41/0xc0 [ 286.515754][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.521933][ T28] RIP: 0033:0x7f0687e28259 [ 286.526401][ T28] RSP: 002b:00007fff7cac8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 286.534955][ T28] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f0687e28259 [ 286.543036][ T28] RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000004 [ 286.551123][ T28] RBP: 0000000000000000 R08: 00007f0687e96ec0 R09: 00007f0687e96ec0 [ 286.559531][ T28] R10: 00007f0687e96ec0 R11: 0000000000000246 R12: 00007fff7cac8190 [ 286.567627][ T28] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 286.575750][ T28] [ 286.578909][ T28] [ 286.578909][ T28] Showing all locks held in the system: [ 286.586751][ T28] 1 lock held by rcu_tasks_kthre/12: [ 286.592353][ T28] #0: ffffffff8cf25950 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 [ 286.603054][ T28] 1 lock held by rcu_tasks_trace/13: [ 286.608373][ T28] #0: ffffffff8cf26150 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 [ 286.619507][ T28] 1 lock held by khungtaskd/28: [ 286.624400][ T28] #0: ffffffff8cf25780 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 286.633956][ T28] 2 locks held by getty/4741: [ 286.638855][ T28] #0: ffff88802cd9b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.648807][ T28] #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 [ 286.659156][ T28] 3 locks held by syz-executor215/5071: [ 286.664837][ T28] #0: ffff88807d1e8460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 286.674624][ T28] #1: ffff88807757de48 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x25a/0x530 [ 286.691433][ T28] #2: ffff88807757db10 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xf6/0xb70 [ 286.704641][ T28] [ 286.707017][ T28] ============================================= [ 286.707017][ T28] [ 286.715657][ T28] NMI backtrace for cpu 1 [ 286.720122][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc8-syzkaller-00151-g925cf0457d7e #0 [ 286.730006][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 286.740074][ T28] Call Trace: [ 286.743378][ T28] [ 286.747072][ T28] dump_stack_lvl+0x1e7/0x2d0 [ 286.751812][ T28] ? nf_tcp_handle_invalid+0x640/0x640 [ 286.757310][ T28] ? panic+0x770/0x770 [ 286.761594][ T28] ? tick_nohz_tick_stopped+0x7b/0xb0 [ 286.767070][ T28] ? nmi_cpu_backtrace+0x256/0x560 [ 286.772447][ T28] nmi_cpu_backtrace+0x4e5/0x560 [ 286.777421][ T28] ? vprintk_emit+0x10d/0x1f0 [ 286.782161][ T28] ? nmi_trigger_cpumask_backtrace+0x3f0/0x3f0 [ 286.788361][ T28] ? _printk+0xd5/0x120 [ 286.792550][ T28] ? panic+0x770/0x770 [ 286.796639][ T28] ? __wake_up_klogd+0xcc/0x100 [ 286.801628][ T28] ? panic+0x770/0x770 [ 286.805713][ T28] ? nmi_trigger_cpumask_backtrace+0xe6/0x3f0 [ 286.811810][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 286.817963][ T28] nmi_trigger_cpumask_backtrace+0x1b4/0x3f0 [ 286.823991][ T28] watchdog+0xf70/0xfb0 [ 286.828256][ T28] kthread+0x270/0x300 [ 286.832380][ T28] ? hungtask_pm_notify+0x90/0x90 [ 286.837704][ T28] ? kthread_blkcg+0xd0/0xd0 [ 286.842315][ T28] ret_from_fork+0x1f/0x30 [ 286.846871][ T28] [ 286.850447][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.855743][ C0] NMI backtrace for cpu 0 [ 286.855755][ C0] CPU: 0 PID: 46 Comm: kworker/u4:3 Not tainted 6.2.0-rc8-syzkaller-00151-g925cf0457d7e #0 [ 286.855772][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 286.855782][ C0] Workqueue: events_unbound toggle_allocation_gate [ 286.855811][ C0] RIP: 0010:lockdep_hardirqs_on_prepare+0x279/0x7a0 [ 286.855840][ C0] Code: 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 75 54 8b 43 20 a9 00 00 04 00 74 2c 31 d2 a9 00 00 03 00 0f 94 c2 83 f2 03 48 8b 7c 24 10 <48> 89 de e8 4f a2 00 00 48 ba 00 00 00 00 00 fc ff df 85 c0 0f 84 [ 286.855853][ C0] RSP: 0018:ffffc90000b777a0 EFLAGS: 00000002 [ 286.855866][ C0] RAX: 00000000000400b2 RBX: ffff88801780e220 RCX: ffffffff816b75da [ 286.855884][ C0] RDX: 0000000000000002 RSI: 0000000000000008 RDI: ffff88801780d7c0 [ 286.855894][ C0] RBP: ffffc90000b77848 R08: dffffc0000000000 R09: fffffbfff2038633 [ 286.855906][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801780e240 [ 286.855917][ C0] R13: 0000000000000001 R14: ffff88801780e1f0 R15: 1ffff11002f01c3e [ 286.855927][ C0] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 286.855941][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.855951][ C0] CR2: 0000559a0ed54680 CR3: 000000000cc8e000 CR4: 00000000003506f0 [ 286.855965][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.855974][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.855984][ C0] Call Trace: [ 286.855988][ C0] [ 286.855996][ C0] ? print_irqtrace_events+0x220/0x220 [ 286.856023][ C0] ? text_poke_memcpy+0x9/0x10 [ 286.856083][ C0] ? kmem_cache_alloc_lru+0x59/0x270 [ 286.856129][ C0] trace_hardirqs_on+0x38/0x50 [ 286.856163][ C0] __text_poke+0x7f8/0xa00 [ 286.856184][ C0] ? kmem_cache_alloc_lru+0x59/0x270 [ 286.856204][ C0] ? __text_poke+0xa00/0xa00 [ 286.856225][ C0] ? text_poke+0x90/0x90 [ 286.856243][ C0] ? kmem_cache_alloc_bulk+0xdd/0x430 [ 286.856264][ C0] ? perf_event_text_poke+0x258/0x330 [ 286.856291][ C0] ? perf_event_bpf_output+0x270/0x270 [ 286.856308][ C0] ? trace_contention_end+0x73/0x1d0 [ 286.856336][ C0] text_poke_bp_batch+0x650/0x850 [ 286.856356][ C0] ? arch_jump_label_transform_apply+0x12/0x30 [ 286.856383][ C0] ? kmem_cache_alloc_bulk+0xde/0x430 [ 286.856404][ C0] ? text_poke_loc_init+0x540/0x540 [ 286.856425][ C0] ? arch_jump_label_transform_queue+0x81/0xd0 [ 286.856447][ C0] text_poke_finish+0x1a/0x30 [ 286.856466][ C0] arch_jump_label_transform_apply+0x17/0x30 [ 286.856482][ C0] static_key_disable_cpuslocked+0xce/0x1b0 [ 286.856524][ C0] static_key_disable+0x1a/0x20 [ 286.856542][ C0] toggle_allocation_gate+0x1b8/0x250 [ 286.856564][ C0] ? virt_to_slab+0x2b0/0x2b0 [ 286.856585][ C0] ? wake_bit_function+0x220/0x220 [ 286.856609][ C0] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 286.856652][ C0] ? do_raw_spin_unlock+0x13b/0x8b0 [ 286.856670][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.856691][ C0] process_one_work+0x8fa/0x1370 [ 286.856737][ C0] ? worker_detach_from_pool+0x260/0x260 [ 286.856759][ C0] ? _raw_spin_lock_irqsave+0x120/0x120 [ 286.856776][ C0] ? kthread_data+0x52/0xc0 [ 286.856804][ C0] ? wq_worker_running+0x9b/0x1a0 [ 286.856821][ C0] worker_thread+0xa63/0x1210 [ 286.856853][ C0] kthread+0x270/0x300 [ 286.856868][ C0] ? rcu_lock_release+0x30/0x30 [ 286.856887][ C0] ? kthread_blkcg+0xd0/0xd0 [ 286.856903][ C0] ret_from_fork+0x1f/0x30 [ 286.856933][ C0] [ 286.856939][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.196 msecs [ 286.857745][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 287.218034][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc8-syzkaller-00151-g925cf0457d7e #0 [ 287.227960][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 287.238063][ T28] Call Trace: [ 287.241360][ T28] [ 287.244303][ T28] dump_stack_lvl+0x1e7/0x2d0 [ 287.249127][ T28] ? nf_tcp_handle_invalid+0x640/0x640 [ 287.254714][ T28] ? panic+0x770/0x770 [ 287.258892][ T28] ? vscnprintf+0x5d/0x80 [ 287.263242][ T28] panic+0x31c/0x770 [ 287.267327][ T28] ? schedule_preempt_disabled+0x20/0x20 [ 287.272983][ T28] ? nmi_trigger_cpumask_backtrace+0x2c5/0x3f0 [ 287.279307][ T28] ? memcpy_page_flushcache+0x100/0x100 [ 287.284926][ T28] ? nmi_trigger_cpumask_backtrace+0x2c5/0x3f0 [ 287.291111][ T28] ? nmi_trigger_cpumask_backtrace+0x33e/0x3f0 [ 287.297306][ T28] ? nmi_trigger_cpumask_backtrace+0x343/0x3f0 [ 287.303515][ T28] watchdog+0xfae/0xfb0 [ 287.307728][ T28] kthread+0x270/0x300 [ 287.311840][ T28] ? hungtask_pm_notify+0x90/0x90 [ 287.316883][ T28] ? kthread_blkcg+0xd0/0xd0 [ 287.321490][ T28] ret_from_fork+0x1f/0x30 [ 287.325938][ T28] [ 287.329257][ T28] Kernel Offset: disabled [ 287.333613][ T28] Rebooting in 86400 seconds..