./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3308541752 <...> Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts. execve("./syz-executor3308541752", ["./syz-executor3308541752"], 0x7ffe3c9e4a50 /* 10 vars */) = 0 brk(NULL) = 0x555556d0c000 brk(0x555556d0cc40) = 0x555556d0cc40 arch_prctl(ARCH_SET_FS, 0x555556d0c300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3308541752", 4096) = 28 brk(0x555556d2dc40) = 0x555556d2dc40 brk(0x555556d2e000) = 0x555556d2e000 mprotect(0x7f5147985000, 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=0x555556d0c5d0) = 3638 ./strace-static-x86_64: Process 3638 attached [pid 3638] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3638] setpgid(0, 0) = 0 [pid 3638] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3638] write(3, "1000", 4) = 4 [pid 3638] close(3) = 0 [pid 3638] memfd_create("syzkaller", 0) = 3 [pid 3638] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f513f400000 [pid 3638] 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 3638] munmap(0x7f513f400000, 1048576) = 0 [pid 3638] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 3638] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 3638] close(3) = 0 [pid 3638] mkdir("./file0", 0777) = 0 [pid 3638] mount("/dev/loop0", "./file0", "ext4", MS_SYNCHRONOUS, "data_err=abort,usrjquota=,dioread_nolock,abort,,errors=continue") = 0 [pid 3638] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 3638] chdir("./file0") = 0 [pid 3638] ioctl(4, LOOP_CLR_FD) = 0 [pid 3638] close(4) = 0 [pid 3638] openat(AT_FDCWD, "cpuset.memory_pressure_enabled", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [pid 3638] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 11) = 11 [pid 3638] openat(AT_FDCWD, "cpuset.memory_pressure_enabled", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 syzkaller login: [ 53.398406][ T3638] loop0: detected capacity change from 0 to 2048 [ 53.410678][ T3638] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 53.438290][ T3638] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. [pid 3638] fallocate(5, FALLOC_FL_COLLAPSE_RANGE, 6, 19715 [pid 3637] kill(-3638, SIGKILL) = 0 [pid 3637] kill(3638, SIGKILL) = 0 [pid 3637] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 3637] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 3637] getdents64(3, 0x555556d0d620 /* 2 entries */, 32768) = 48 [pid 3637] getdents64(3, 0x555556d0d620 /* 0 entries */, 32768) = 0 [pid 3637] close(3) = 0 [ 76.214446][ T14] cfg80211: failed to load regulatory.db [ 286.133077][ T28] INFO: task syz-executor330:3638 blocked for more than 143 seconds. [ 286.141238][ T28] Not tainted 6.1.0-rc6-syzkaller-00375-gcf562a45a0d5 #0 [ 286.148826][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.157557][ T28] task:syz-executor330 state:D stack:20624 pid:3638 ppid:3637 flags:0x00004004 [ 286.166821][ T28] Call Trace: [ 286.170098][ T28] [ 286.173067][ T28] __schedule+0x8c9/0xd70 [ 286.177524][ T28] ? __sched_text_start+0x8/0x8 [ 286.182365][ T28] ? lockdep_hardirqs_on+0x8d/0x130 [ 286.187724][ T28] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 286.193659][ T28] ? _raw_spin_unlock+0x40/0x40 [ 286.198505][ T28] schedule+0xcb/0x190 [ 286.202563][ T28] io_schedule+0x83/0x100 [ 286.206929][ T28] bit_wait_io+0xe/0xc0 [ 286.211094][ T28] __wait_on_bit_lock+0xbb/0x1a0 [ 286.216185][ T28] ? bit_wait+0xc0/0xc0 [ 286.220350][ T28] out_of_line_wait_on_bit_lock+0x1c3/0x240 [ 286.226277][ T28] ? bit_wait+0xc0/0xc0 [ 286.230446][ T28] ? __wait_on_bit_lock+0x1a0/0x1a0 [ 286.235689][ T28] ? bit_waitqueue+0x30/0x30 [ 286.240333][ T28] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.245592][ T28] __sync_dirty_buffer+0x107/0x330 [ 286.250782][ T28] __ext4_handle_dirty_metadata+0x29a/0x810 [ 286.256764][ T28] ? ext4_convert_inline_data_nolock+0x670/0x820 [ 286.263153][ T28] ext4_convert_inline_data_nolock+0x6e8/0x820 [ 286.269297][ T28] ? ext4_add_dirent_to_inline+0x450/0x450 [ 286.275177][ T28] ? __ext4_journal_start_sb+0x16e/0x1d0 [ 286.280829][ T28] ext4_convert_inline_data+0x4bf/0x600 [ 286.286445][ T28] ? memalloc_retry_wait+0xb0/0xb0 [ 286.291590][ T28] ext4_fallocate+0x149/0x1c90 [ 286.296399][ T28] ? rcu_read_lock_any_held+0xb1/0x130 [ 286.301944][ T28] ? memalloc_retry_wait+0xb0/0xb0 [ 286.307118][ T28] vfs_fallocate+0x515/0x670 [ 286.311759][ T28] __x64_sys_fallocate+0xb9/0x100 [ 286.316825][ T28] do_syscall_64+0x3d/0xb0 [ 286.321245][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.327206][ T28] RIP: 0033:0x7f51479172d9 [ 286.331710][ T28] RSP: 002b:00007ffca83f0d78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 286.340166][ T28] RAX: ffffffffffffffda RBX: 00007f514795b860 RCX: 00007f51479172d9 [ 286.348165][ T28] RDX: 0000000000000006 RSI: 0000000000000008 RDI: 0000000000000005 [ 286.356178][ T28] RBP: 0000000000000000 R08: 00007f5147985ec0 R09: 00007f5147985ec0 [ 286.364169][ T28] R10: 0000000000004d03 R11: 0000000000000246 R12: 00007ffca83f0da0 [ 286.372129][ T28] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 286.380161][ T28] [ 286.383214][ T28] [ 286.383214][ T28] Showing all locks held in the system: [ 286.390916][ T28] 1 lock held by rcu_tasks_kthre/12: [ 286.396224][ T28] #0: ffffffff8d1272b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.406739][ T28] 1 lock held by rcu_tasks_trace/13: [ 286.412016][ T28] #0: ffffffff8d127ab0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 [ 286.423006][ T28] 1 lock held by khungtaskd/28: [ 286.427857][ T28] #0: ffffffff8d1270e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 286.437295][ T28] 2 locks held by getty/3309: [ 286.441966][ T28] #0: ffff88814503e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 [ 286.451792][ T28] #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 [ 286.461925][ T28] 3 locks held by syz-executor330/3638: [ 286.467502][ T28] #0: ffff8880778dc460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x489/0x670 [ 286.476780][ T28] #1: ffff8880748f6850 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x141/0x1c90 [ 286.487422][ T28] #2: ffff8880748f6518 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x39b/0x600 [ 286.497827][ T28] [ 286.500135][ T28] ============================================= [ 286.500135][ T28] [ 286.508563][ T28] NMI backtrace for cpu 0 [ 286.512893][ T28] CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc6-syzkaller-00375-gcf562a45a0d5 #0 [ 286.522690][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 286.532725][ T28] Call Trace: [ 286.535988][ T28] [ 286.538902][ T28] dump_stack_lvl+0x1b1/0x28e [ 286.543571][ T28] ? nf_tcp_handle_invalid+0x62e/0x62e [ 286.549010][ T28] ? panic+0x710/0x710 [ 286.553058][ T28] ? console_unlock+0x2f1/0x6f0 [ 286.557894][ T28] ? console_trylock_spinning+0x410/0x410 [ 286.563620][ T28] ? nmi_cpu_backtrace+0x205/0x4f0 [ 286.568761][ T28] nmi_cpu_backtrace+0x46f/0x4f0 [ 286.573698][ T28] ? vprintk_emit+0x109/0x1e0 [ 286.578373][ T28] ? nmi_trigger_cpumask_backtrace+0x420/0x420 [ 286.584526][ T28] ? _printk+0xc0/0x100 [ 286.588684][ T28] ? panic+0x710/0x710 [ 286.592756][ T28] ? __wake_up_klogd+0xcd/0x100 [ 286.597610][ T28] ? panic+0x710/0x710 [ 286.601676][ T28] ? nmi_trigger_cpumask_backtrace+0xc9/0x420 [ 286.607738][ T28] nmi_trigger_cpumask_backtrace+0x1ba/0x420 [ 286.613711][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 286.619847][ T28] watchdog+0xcf5/0xd40 [ 286.624087][ T28] kthread+0x266/0x300 [ 286.628288][ T28] ? hungtask_pm_notify+0x50/0x50 [ 286.633311][ T28] ? kthread_blkcg+0xd0/0xd0 [ 286.637902][ T28] ret_from_fork+0x1f/0x30 [ 286.642346][ T28] [ 286.645513][ T28] Sending NMI from CPU 0 to CPUs 1: [ 286.650736][ C1] NMI backtrace for cpu 1 [ 286.650745][ C1] CPU: 1 PID: 63 Comm: kworker/u4:4 Not tainted 6.1.0-rc6-syzkaller-00375-gcf562a45a0d5 #0 [ 286.650759][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 286.650768][ C1] Workqueue: events_unbound toggle_allocation_gate [ 286.650831][ C1] RIP: 0010:__lock_acquire+0x120e/0x1f60 [ 286.650847][ C1] Code: 8b 5d 00 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 40 71 59 90 be 08 00 00 00 e8 da 4e 74 00 48 0f a3 1d c2 0c ef 0e <72> 31 48 c7 c0 40 f0 d8 91 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff [ 286.650858][ C1] RSP: 0018:ffffc900015878e8 EFLAGS: 00000057 [ 286.650868][ C1] RAX: 0000000000000001 RBX: 0000000000000005 RCX: ffffffff816a6476 [ 286.650876][ C1] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90597140 [ 286.650884][ C1] RBP: ffff888018a32800 R08: dffffc0000000000 R09: fffffbfff20b2e29 [ 286.650893][ C1] R10: fffffbfff20b2e29 R11: 1ffffffff20b2e28 R12: 1ffff110031464f0 [ 286.650902][ C1] R13: 4d9eda2362491e36 R14: ffff888018a32780 R15: 0000000000002000 [ 286.650911][ C1] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 286.650922][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.650930][ C1] CR2: 0000556ee972d680 CR3: 000000000ce8e000 CR4: 00000000003506e0 [ 286.650941][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.650948][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.650956][ C1] Call Trace: [ 286.650960][ C1] [ 286.650971][ C1] lock_acquire+0x182/0x3c0 [ 286.650984][ C1] ? static_key_disable+0xe/0x20 [ 286.651020][ C1] ? read_lock_is_recursive+0x10/0x10 [ 286.651034][ C1] ? __might_sleep+0xc0/0xc0 [ 286.651065][ C1] ? __might_sleep+0xc0/0xc0 [ 286.651078][ C1] ? rcu_read_lock_any_held+0xb1/0x130 [ 286.651092][ C1] ? rcu_read_lock_bh_held+0xf0/0xf0 [ 286.651107][ C1] cpus_read_lock+0x3e/0x130 [ 286.651137][ C1] ? static_key_disable+0xe/0x20 [ 286.651151][ C1] static_key_disable+0xe/0x20 [ 286.651166][ C1] toggle_allocation_gate+0x3b8/0x450 [ 286.651181][ C1] ? virt_to_slab+0x2c0/0x2c0 [ 286.651197][ C1] ? rcu_read_lock_sched_held+0x87/0x110 [ 286.651210][ C1] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 286.651222][ C1] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 286.651241][ C1] ? do_raw_spin_unlock+0x134/0x8a0 [ 286.651259][ C1] process_one_work+0x877/0xdb0 [ 286.651294][ C1] ? worker_detach_from_pool+0x260/0x260 [ 286.651311][ C1] ? _raw_spin_lock_irq+0xba/0xf0 [ 286.651326][ C1] ? _raw_spin_lock_irqsave+0x100/0x100 [ 286.651346][ C1] worker_thread+0xb14/0x1330 [ 286.651364][ C1] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 286.651387][ C1] kthread+0x266/0x300 [ 286.651398][ C1] ? rcu_lock_release+0x20/0x20 [ 286.651411][ C1] ? kthread_blkcg+0xd0/0xd0 [ 286.651424][ C1] ret_from_fork+0x1f/0x30 [ 286.651445][ C1] [ 286.651777][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 286.939625][ T28] CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc6-syzkaller-00375-gcf562a45a0d5 #0 [ 286.949420][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 286.959466][ T28] Call Trace: [ 286.962739][ T28] [ 286.965663][ T28] dump_stack_lvl+0x1b1/0x28e [ 286.970339][ T28] ? nf_tcp_handle_invalid+0x62e/0x62e [ 286.975789][ T28] ? panic+0x710/0x710 [ 286.979860][ T28] ? vscnprintf+0x59/0x80 [ 286.984187][ T28] panic+0x2d6/0x710 [ 286.988073][ T28] ? schedule_preempt_disabled+0x20/0x20 [ 286.993700][ T28] ? nmi_trigger_cpumask_backtrace+0x2d0/0x420 [ 286.999846][ T28] ? memcpy_page_flushcache+0xfc/0xfc [ 287.005214][ T28] ? nmi_trigger_cpumask_backtrace+0x2d0/0x420 [ 287.011791][ T28] ? nmi_trigger_cpumask_backtrace+0x34e/0x420 [ 287.017938][ T28] ? nmi_trigger_cpumask_backtrace+0x353/0x420 [ 287.024092][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 287.030156][ T28] watchdog+0xd35/0xd40 [ 287.034322][ T28] kthread+0x266/0x300 [ 287.038388][ T28] ? hungtask_pm_notify+0x50/0x50 [ 287.043405][ T28] ? kthread_blkcg+0xd0/0xd0 [ 287.047994][ T28] ret_from_fork+0x1f/0x30 [ 287.052424][ T28] [ 287.055592][ T28] Kernel Offset: disabled [ 287.059917][ T28] Rebooting in 86400 seconds..