./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3882701241 <...> Warning: Permanently added '10.128.0.40' (ED25519) to the list of known hosts. execve("./syz-executor3882701241", ["./syz-executor3882701241"], 0x7ffde854af90 /* 10 vars */) = 0 brk(NULL) = 0x555576ae8000 brk(0x555576ae8d00) = 0x555576ae8d00 arch_prctl(ARCH_SET_FS, 0x555576ae8380) = 0 set_tid_address(0x555576ae8650) = 5824 set_robust_list(0x555576ae8660, 24) = 0 rseq(0x555576ae8ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3882701241", 4096) = 28 getrandom("\x76\x1d\xec\x1c\xc0\xa6\xfa\xb1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555576ae8d00 brk(0x555576b09d00) = 0x555576b09d00 brk(0x555576b0a000) = 0x555576b0a000 mprotect(0x7fa5e0e4b000, 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./strace-static-x86_64: Process 5825 attached , child_tidptr=0x555576ae8650) = 5825 [pid 5825] set_robust_list(0x555576ae8660, 24) = 0 [pid 5825] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5825] setpgid(0, 0) = 0 [pid 5825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5825] write(3, "1000", 4) = 4 [pid 5825] close(3) = 0 executing program [pid 5825] write(1, "executing program\n", 18) = 18 [pid 5825] memfd_create("syzkaller", 0) = 3 [pid 5825] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa5d8800000 [pid 5825] 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 5825] munmap(0x7fa5d8800000, 138412032) = 0 [pid 5825] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5825] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5825] close(3) = 0 [pid 5825] close(4) = 0 [pid 5825] mkdir("./bus", 0777) = 0 [ 100.323148][ T5825] loop0: detected capacity change from 0 to 32768 [pid 5825] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5825] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5825] chdir("./bus") = 0 [pid 5825] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5825] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 0400 [pid 5824] kill(-5825, SIGKILL) = 0 [pid 5824] kill(5825, SIGKILL) = 0 [pid 5824] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5824] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5824] getdents64(3, 0x555576ae96f0 /* 2 entries */, 32768) = 48 [pid 5824] getdents64(3, 0x555576ae96f0 /* 0 entries */, 32768) = 0 [pid 5824] close(3) = 0 [ 286.941055][ T30] INFO: task kworker/u8:5:1529 blocked for more than 143 seconds. [ 286.949099][ T30] Not tainted 6.13.0-rc7-syzkaller #0 [ 286.955846][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.965314][ T30] task:kworker/u8:5 state:D stack:23952 pid:1529 tgid:1529 ppid:2 flags:0x00004000 [ 286.975881][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 286.982374][ T30] Call Trace: [ 286.985689][ T30] [ 286.988652][ T30] __schedule+0x17fb/0x4be0 [ 286.993851][ T30] ? __pfx___schedule+0x10/0x10 [ 286.998776][ T30] ? __blk_flush_plug+0x449/0x500 [ 287.004341][ T30] ? __pfx_lock_release+0x10/0x10 [ 287.009452][ T30] ? kthread_data+0x52/0xd0 [ 287.014379][ T30] ? schedule+0x90/0x320 [ 287.018677][ T30] ? wq_worker_sleeping+0x66/0x240 [ 287.024289][ T30] ? schedule+0x90/0x320 [ 287.028583][ T30] schedule+0x14b/0x320 [ 287.033228][ T30] schedule_preempt_disabled+0x13/0x30 [ 287.038741][ T30] __mutex_lock+0x7e7/0xee0 [ 287.043805][ T30] ? __mutex_lock+0x5ef/0xee0 [ 287.048544][ T30] ? jfs_commit_inode+0x24a/0x590 [ 287.054055][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 287.059163][ T30] jfs_commit_inode+0x24a/0x590 [ 287.064582][ T30] ? __pfx_jfs_commit_inode+0x10/0x10 [ 287.070034][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.076384][ T30] jfs_write_inode+0x143/0x220 [ 287.081515][ T30] __writeback_single_inode+0x708/0x10d0 [ 287.087209][ T30] writeback_sb_inodes+0x820/0x1360 [ 287.092881][ T30] ? mark_lock+0x2ae/0x360 [ 287.097387][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 287.103536][ T30] ? __pfx___up_read+0x10/0x10 [ 287.108373][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 287.113920][ T30] __writeback_inodes_wb+0x11b/0x260 [ 287.119275][ T30] wb_writeback+0x427/0xb80 [ 287.124295][ T30] ? queue_io+0x3b1/0x5a0 [ 287.128768][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 287.134267][ T30] wb_workfn+0xc4b/0x1080 [ 287.138667][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 287.143919][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.149958][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 287.157444][ T30] ? process_scheduled_works+0x976/0x1840 [ 287.163635][ T30] process_scheduled_works+0xa66/0x1840 [ 287.169269][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 287.175741][ T30] ? assign_work+0x364/0x3d0 [ 287.180487][ T30] worker_thread+0x870/0xd30 [ 287.186191][ T30] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 287.192466][ T30] ? __kthread_parkme+0x169/0x1d0 [ 287.197562][ T30] ? __pfx_worker_thread+0x10/0x10 [ 287.203261][ T30] kthread+0x2f0/0x390 [ 287.207375][ T30] ? __pfx_worker_thread+0x10/0x10 [ 287.212938][ T30] ? __pfx_kthread+0x10/0x10 [ 287.217576][ T30] ret_from_fork+0x4b/0x80 [ 287.222647][ T30] ? __pfx_kthread+0x10/0x10 [ 287.227285][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.232549][ T30] [ 287.235713][ T30] [ 287.235713][ T30] Showing all locks held in the system: [ 287.244010][ T30] 1 lock held by khungtaskd/30: [ 287.248894][ T30] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 [ 287.259677][ T30] 4 locks held by kworker/u8:5/1529: [ 287.265333][ T30] #0: ffff888143e87148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 [ 287.276991][ T30] #1: ffffc90004d4fd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 [ 287.290007][ T30] #2: ffff888079fec0e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x22/0xf0 [ 287.301856][ T30] #3: ffff88807251afe0 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x24a/0x590 [ 287.312545][ T30] 2 locks held by getty/5577: [ 287.317263][ T30] #0: ffff88803174d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.327659][ T30] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 [ 287.337920][ T30] 4 locks held by syz-executor388/5825: [ 287.343656][ T30] [ 287.346009][ T30] ============================================= [ 287.346009][ T30] [ 287.354534][ T30] NMI backtrace for cpu 0 [ 287.358898][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc7-syzkaller #0 [ 287.367695][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.377778][ T30] Call Trace: [ 287.381092][ T30] [ 287.384046][ T30] dump_stack_lvl+0x241/0x360 [ 287.388764][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.393999][ T30] ? __pfx__printk+0x10/0x10 [ 287.398636][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 287.403619][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.409112][ T30] ? _printk+0xd5/0x120 [ 287.413301][ T30] ? __pfx__printk+0x10/0x10 [ 287.417926][ T30] ? __wake_up_klogd+0xcc/0x110 [ 287.422819][ T30] ? __pfx__printk+0x10/0x10 [ 287.427444][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 287.432504][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.438542][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.444562][ T30] watchdog+0xff6/0x1040 [ 287.448837][ T30] ? watchdog+0x1ea/0x1040 [ 287.453289][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.457994][ T30] kthread+0x2f0/0x390 [ 287.462096][ T30] ? __pfx_watchdog+0x10/0x10 [ 287.466801][ T30] ? __pfx_kthread+0x10/0x10 [ 287.471422][ T30] ret_from_fork+0x4b/0x80 [ 287.475865][ T30] ? __pfx_kthread+0x10/0x10 [ 287.480484][ T30] ret_from_fork_asm+0x1a/0x30 [ 287.485388][ T30] [ 287.488611][ T30] Sending NMI from CPU 0 to CPUs 1: [ 287.493905][ C1] NMI backtrace for cpu 1 [ 287.493924][ C1] CPU: 1 UID: 0 PID: 5825 Comm: syz-executor388 Not tainted 6.13.0-rc7-syzkaller #0 [ 287.493949][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.493964][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x0/0x90 [ 287.493989][ C1] Code: 11 18 4c 89 44 11 20 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 4c 8b 04 24 65 48 8b 14 25 80 d4 03 00 65 8b 05 90 5f [ 287.494004][ C1] RSP: 0018:ffffc9000401f498 EFLAGS: 00000293 [ 287.494021][ C1] RAX: ffffffff832f557e RBX: 0000000000000000 RCX: ffff88807cc69e00 [ 287.494034][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.494045][ C1] RBP: ffffc9000401f690 R08: ffffffff832f5550 R09: 0000000000000000 [ 287.494057][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888075dde000 [ 287.494068][ C1] R13: dffffc0000000000 R14: ffff88807251b248 R15: 0000000000000000 [ 287.494081][ C1] FS: 0000555576ae8380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 287.494097][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.494109][ C1] CR2: 000055ffe3e35600 CR3: 0000000075e42000 CR4: 00000000003526f0 [ 287.494124][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.494135][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.494146][ C1] Call Trace: [ 287.494152][ C1] [ 287.494159][ C1] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 287.494182][ C1] ? __pfx_lock_acquire+0x10/0x10 [ 287.494203][ C1] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.494224][ C1] ? nmi_handle+0x2a/0x5a0 [ 287.494252][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 287.494278][ C1] ? nmi_handle+0x14f/0x5a0 [ 287.494297][ C1] ? nmi_handle+0x2a/0x5a0 [ 287.494317][ C1] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.494336][ C1] ? default_do_nmi+0x63/0x160 [ 287.494357][ C1] ? exc_nmi+0x123/0x1f0 [ 287.494377][ C1] ? end_repeat_nmi+0xf/0x53 [ 287.494397][ C1] ? dtSplitRoot+0x8b0/0x1930 [ 287.494419][ C1] ? dtSplitRoot+0x8de/0x1930 [ 287.494442][ C1] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.494462][ C1] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.494482][ C1] ? __pfx___sanitizer_cov_trace_const_cmp1+0x10/0x10 [ 287.494501][ C1] [ 287.494507][ C1] [ 287.494513][ C1] dtSplitRoot+0x8b0/0x1930 [ 287.494549][ C1] ? __pfx_dtSplitRoot+0x10/0x10 [ 287.494575][ C1] ? dtInsert+0xd86/0x6c10 [ 287.494600][ C1] dtInsert+0x12cd/0x6c10 [ 287.494639][ C1] ? __pfx_dtInsert+0x10/0x10 [ 287.494664][ C1] ? __pfx_lock_acquire+0x10/0x10 [ 287.494683][ C1] ? txLock+0x2b3/0x1cf0 [ 287.494700][ C1] ? __pfx_lock_release+0x10/0x10 [ 287.494718][ C1] ? do_raw_spin_lock+0x14f/0x370 [ 287.494748][ C1] ? do_raw_spin_unlock+0x13c/0x8b0 [ 287.494774][ C1] ? kfree+0x196/0x430 [ 287.494799][ C1] ? dtSearch+0x1d59/0x2520 [ 287.494842][ C1] jfs_create+0x7ba/0xbb0 [ 287.494873][ C1] ? __pfx_jfs_create+0x10/0x10 [ 287.494916][ C1] ? bpf_lsm_inode_create+0x9/0x10 [ 287.494944][ C1] ? security_inode_create+0xbe/0x340 [ 287.494973][ C1] vfs_create+0x23c/0x3d0 [ 287.494997][ C1] do_mknodat+0x447/0x5b0 [ 287.495019][ C1] ? __pfx_do_mknodat+0x10/0x10 [ 287.495040][ C1] ? getname_flags+0x1e3/0x540 [ 287.495059][ C1] __x64_sys_mknod+0x8c/0xa0 [ 287.495082][ C1] do_syscall_64+0xf3/0x230 [ 287.495098][ C1] ? clear_bhb_loop+0x35/0x90 [ 287.495117][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.495145][ C1] RIP: 0033:0x7fa5e0dd1a59 [ 287.495167][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 287.495181][ C1] RSP: 002b:00007ffcc074d998 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 [ 287.495198][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa5e0dd1a59 [ 287.495211][ C1] RDX: 0000000000000701 RSI: 0000000000000100 RDI: 0000000020000100 [ 287.495222][ C1] RBP: 00007fa5e0e4b5f0 R08: 000000000000618e R09: 0000555576ae94c0 [ 287.495234][ C1] R10: 00007ffcc074d860 R11: 0000000000000246 R12: 00007ffcc074d9c0 [ 287.495246][ C1] R13: 00007ffcc074dbe8 R14: 431bde82d7b634db R15: 00007fa5e0e1a03b [ 287.495266][ C1] [ 287.495273][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.369 msecs [ 287.496303][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 287.932473][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc7-syzkaller #0 [ 287.941251][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 287.951344][ T30] Call Trace: [ 287.954648][ T30] [ 287.957616][ T30] dump_stack_lvl+0x241/0x360 [ 287.962462][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.967694][ T30] ? __pfx__printk+0x10/0x10 [ 287.972299][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 287.978297][ T30] ? vscnprintf+0x5d/0x90 [ 287.982643][ T30] panic+0x349/0x880 [ 287.986553][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.992723][ T30] ? __pfx_panic+0x10/0x10 [ 287.997158][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 288.002542][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 288.008709][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 288.014876][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 288.021137][ T30] watchdog+0x1035/0x1040 [ 288.025482][ T30] ? watchdog+0x1ea/0x1040 [ 288.029914][ T30] ? __pfx_watchdog+0x10/0x10 [ 288.034602][ T30] kthread+0x2f0/0x390 [ 288.038687][ T30] ? __pfx_watchdog+0x10/0x10 [ 288.043372][ T30] ? __pfx_kthread+0x10/0x10 [ 288.047975][ T30] ret_from_fork+0x4b/0x80 [ 288.052401][ T30] ? __pfx_kthread+0x10/0x10 [ 288.057016][ T30] ret_from_fork_asm+0x1a/0x30 [ 288.061806][ T30] [ 288.065147][ T30] Kernel Offset: disabled [ 288.069487][ T30] Rebooting in 86400 seconds..