./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1366730615 <...> DUID 00:04:e3:a1:4c:5b:a4:47:39:93:9a:5d:f6:69:14:97:a9:57 forked to background, child pid 4658 [ 52.855661][ T4659] 8021q: adding VLAN 0 to HW filter on device bond0 [ 52.871826][ T4659] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.252' (ECDSA) to the list of known hosts. execve("./syz-executor1366730615", ["./syz-executor1366730615"], 0x7fff83ebb840 /* 10 vars */) = 0 brk(NULL) = 0x5555573e6000 brk(0x5555573e6c40) = 0x5555573e6c40 arch_prctl(ARCH_SET_FS, 0x5555573e6300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1366730615", 4096) = 28 brk(0x555557407c40) = 0x555557407c40 brk(0x555557408000) = 0x555557408000 mprotect(0x7fbd8b50f000, 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=0x5555573e65d0) = 5084 ./strace-static-x86_64: Process 5084 attached [pid 5084] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5084] setpgid(0, 0) = 0 [pid 5084] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5084] write(3, "1000", 4) = 4 [pid 5084] close(3) = 0 [pid 5084] memfd_create("syzkaller", 0) = 3 [pid 5084] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fbd83054000 [pid 5084] 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 5084] munmap(0x7fbd83054000, 1048576) = 0 [pid 5084] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 syzkaller login: [ 77.620087][ T5084] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5084 'syz-executor136' [pid 5084] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5084] close(3) = 0 [pid 5084] mkdir("./file0", 0777) = 0 [ 77.661728][ T5084] loop0: detected capacity change from 0 to 2048 [ 77.676513][ T5084] EXT4-fs: Ignoring removed oldalloc option [ 77.686341][ T5084] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5084] mount("/dev/loop0", "./file0", "ext4", MS_SYNCHRONOUS, "barrier,noauto_da_alloc,dioread_nolock,oldalloc,,errors=continue") = 0 [pid 5084] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5084] chdir("./file0") = 0 [pid 5084] ioctl(4, LOOP_CLR_FD) = 0 [pid 5084] close(4) = 0 [pid 5084] open("./file1", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|FASYNC|0x3c, 0400) = 4 [ 77.711736][ T5084] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. [ 77.736819][ T27] audit: type=1800 audit(1678002023.392:2): pid=5084 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed(directio) comm="syz-executor136" name="file1" dev="loop0" ino=15 res=0 errno=0 [pid 5084] fallocate(4, 0, 0, 1048820 [pid 5083] kill(-5084, SIGKILL) = 0 [pid 5083] kill(5084, SIGKILL) = 0 [pid 5083] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5083] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5083] getdents64(3, 0x5555573e7620 /* 2 entries */, 32768) = 48 [pid 5083] getdents64(3, 0x5555573e7620 /* 0 entries */, 32768) = 0 [pid 5083] close(3) = 0 [ 91.556789][ T7] cfg80211: failed to load regulatory.db [ 286.114566][ T28] INFO: task syz-executor136:5084 blocked for more than 143 seconds. [ 286.122764][ T28] Not tainted 6.2.0-next-20230303-syzkaller #0 [ 286.129577][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.138347][ T28] task:syz-executor136 state:D stack:25344 pid:5084 ppid:5083 flags:0x00004004 [ 286.147659][ T28] Call Trace: [ 286.150979][ T28] [ 286.153926][ T28] __schedule+0x24b4/0x5ac0 [ 286.158578][ T28] ? print_usage_bug.part.0+0x660/0x660 [ 286.164212][ T28] ? find_held_lock+0x2d/0x110 [ 286.169058][ T28] ? io_schedule_timeout+0x150/0x150 [ 286.174455][ T28] ? mark_held_locks+0x9f/0xe0 [ 286.179252][ T28] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 286.185150][ T28] schedule+0xde/0x1a0 [ 286.189275][ T28] io_schedule+0xbe/0x130 [ 286.193624][ T28] bit_wait_io+0x16/0xe0 [ 286.197933][ T28] __wait_on_bit_lock+0x11f/0x1a0 [ 286.203010][ T28] ? out_of_line_wait_on_bit_timeout+0x170/0x170 [ 286.209431][ T28] out_of_line_wait_on_bit_lock+0xd9/0x110 [ 286.215325][ T28] ? __wait_on_bit_lock+0x1a0/0x1a0 [ 286.220582][ T28] ? group_init+0x6b0/0x6b0 [ 286.225186][ T28] ? _raw_spin_unlock+0x28/0x40 [ 286.230092][ T28] __sync_dirty_buffer+0x30e/0x380 [ 286.235333][ T28] __ext4_handle_dirty_metadata+0x2b7/0x8e0 [ 286.241312][ T28] ? __ext4_journal_get_create_access+0x182/0x1f0 [ 286.247823][ T28] ext4_convert_inline_data_nolock+0x6e6/0xf10 [ 286.254112][ T28] ? ext4_destroy_inline_data_nolock+0x580/0x580 [ 286.260548][ T28] ? down_write_killable_nested+0x250/0x250 [ 286.266527][ T28] ? __ext4_journal_start_sb+0x231/0x890 [ 286.272210][ T28] ? ext4_convert_inline_data+0x316/0x5f0 [ 286.278133][ T28] ext4_convert_inline_data+0x51a/0x5f0 [ 286.283736][ T28] ? ext4_inline_data_truncate+0xd70/0xd70 [ 286.289630][ T28] ? down_write_killable_nested+0x250/0x250 [ 286.295621][ T28] ? do_raw_spin_lock+0x124/0x2b0 [ 286.300674][ T28] ? aa_path_link+0x2f0/0x2f0 [ 286.305488][ T28] ext4_fallocate+0x19a/0x4470 [ 286.310299][ T28] ? ext4_ext_truncate+0x400/0x400 [ 286.315493][ T28] ? ext4_ext_truncate+0x400/0x400 [ 286.320655][ T28] vfs_fallocate+0x48b/0xe40 [ 286.325383][ T28] __x64_sys_fallocate+0xd3/0x140 [ 286.330492][ T28] do_syscall_64+0x39/0xb0 [ 286.335010][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.340989][ T28] RIP: 0033:0x7fbd8b4a1229 [ 286.345483][ T28] RSP: 002b:00007ffd53a2b0e8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 286.354592][ T28] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbd8b4a1229 [ 286.362574][ T28] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 286.370605][ T28] RBP: 0000000000000000 R08: 00007fbd8b50fec0 R09: 00007fbd8b50fec0 [ 286.378638][ T28] R10: 00000000001000f4 R11: 0000000000000246 R12: 00007ffd53a2b110 [ 286.386686][ T28] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 286.394744][ T28] [ 286.397827][ T28] [ 286.397827][ T28] Showing all locks held in the system: [ 286.405625][ T28] 1 lock held by rcu_tasks_kthre/12: [ 286.410931][ T28] #0: ffffffff8c7964f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 [ 286.421532][ T28] 1 lock held by rcu_tasks_trace/13: [ 286.426854][ T28] #0: ffffffff8c7961f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 [ 286.437909][ T28] 1 lock held by khungtaskd/28: [ 286.442955][ T28] #0: ffffffff8c797040 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 [ 286.452927][ T28] 2 locks held by getty/4762: [ 286.457651][ T28] #0: ffff888027e24098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 [ 286.467577][ T28] #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 [ 286.477813][ T28] 3 locks held by syz-executor136/5084: [ 286.483371][ T28] #0: ffff888079eaa460 (sb_writers#4){.+.+}-{0:0}, at: __x64_sys_fallocate+0xd3/0x140 [ 286.493132][ T28] #1: ffff888077a9b628 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x192/0x4470 [ 286.503896][ T28] #2: ffff888077a9b2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x352/0x5f0 [ 286.514384][ T28] [ 286.516743][ T28] ============================================= [ 286.516743][ T28] [ 286.525233][ T28] NMI backtrace for cpu 1 [ 286.529575][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-next-20230303-syzkaller #0 [ 286.538544][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 286.548616][ T28] Call Trace: [ 286.551904][ T28] [ 286.554849][ T28] dump_stack_lvl+0xd9/0x150 [ 286.559539][ T28] nmi_cpu_backtrace+0x316/0x3e0 [ 286.564519][ T28] nmi_trigger_cpumask_backtrace+0x3a7/0x460 [ 286.570533][ T28] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 286.575786][ T28] watchdog+0xe94/0x11e0 [ 286.580076][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.586095][ T28] kthread+0x2e8/0x3a0 [ 286.590257][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.595927][ T28] ret_from_fork+0x1f/0x30 [ 286.600390][ T28] [ 286.603565][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.608874][ C0] NMI backtrace for cpu 0 [ 286.608885][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.2.0-next-20230303-syzkaller #0 [ 286.608909][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 286.608922][ C0] RIP: 0010:ktime_get+0x4/0x470 [ 286.609004][ C0] Code: e9 cc fd ff ff 4c 89 e7 e8 c9 8f 62 00 e9 89 fd ff ff e8 bf 8f 62 00 eb a5 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa <41> 57 41 56 41 55 41 54 55 53 48 83 ec 18 e8 a9 24 10 00 8b 1d 7f [ 286.609026][ C0] RSP: 0018:ffffffff8c407e08 EFLAGS: 00000002 [ 286.609044][ C0] RAX: 0000000000000000 RBX: ffff8880b982c120 RCX: 0000000000000000 [ 286.609060][ C0] RDX: 0000000000000004 RSI: ffffffff81780866 RDI: 0000000000000007 [ 286.609074][ C0] RBP: ffff8880b982c16c R08: 0000000000000007 R09: 0000000000000000 [ 286.609089][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 286.609103][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 286.609117][ C0] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 286.609140][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.609156][ C0] CR2: 00005562de876680 CR3: 000000000c571000 CR4: 00000000003506f0 [ 286.609171][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.609184][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.609210][ C0] Call Trace: [ 286.609215][ C0] [ 286.609220][ C0] tick_nohz_idle_enter+0x14a/0x250 [ 286.609270][ C0] do_idle+0x88/0x440 [ 286.609317][ C0] ? arch_cpu_idle_exit+0x30/0x30 [ 286.609355][ C0] cpu_startup_entry+0x18/0x20 [ 286.609384][ C0] rest_init+0x16d/0x2b0 [ 286.609408][ C0] ? regulator_has_full_constraints+0x9/0x20 [ 286.609463][ C0] ? trace_init_perf_perm_irq_work_exit+0x20/0x20 [ 286.609497][ C0] arch_call_rest_init+0x13/0x30 [ 286.609527][ C0] start_kernel+0x35a/0x4d0 [ 286.609556][ C0] secondary_startup_64_no_verify+0xce/0xdb [ 286.609596][ C0] [ 286.609870][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 286.809739][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-next-20230303-syzkaller #0 [ 286.818694][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 286.828772][ T28] Call Trace: [ 286.832059][ T28] [ 286.835002][ T28] dump_stack_lvl+0xd9/0x150 [ 286.839659][ T28] panic+0x688/0x730 [ 286.843720][ T28] ? panic_smp_self_stop+0x90/0x90 [ 286.848867][ T28] ? irq_work_claim+0x76/0x90 [ 286.853636][ T28] ? irq_work_queue+0x2d/0x80 [ 286.858346][ T28] ? watchdog+0xc20/0x11e0 [ 286.862797][ T28] watchdog+0xc31/0x11e0 [ 286.867074][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.873078][ T28] kthread+0x2e8/0x3a0 [ 286.877166][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.882831][ T28] ret_from_fork+0x1f/0x30 [ 286.887292][ T28] [ 286.890566][ T28] Kernel Offset: disabled [ 286.894907][ T28] Rebooting in 86400 seconds..