./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor196813887 <...> Warning: Permanently added '10.128.0.252' (ED25519) to the list of known hosts. execve("./syz-executor196813887", ["./syz-executor196813887"], 0x7fffd285c3c0 /* 10 vars */) = 0 brk(NULL) = 0x55555a212000 brk(0x55555a212d00) = 0x55555a212d00 arch_prctl(ARCH_SET_FS, 0x55555a212380) = 0 set_tid_address(0x55555a212650) = 5833 set_robust_list(0x55555a212660, 24) = 0 rseq(0x55555a212ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor196813887", 4096) = 27 getrandom("\x2b\xad\xcd\xf9\x4b\xe0\xb7\xc6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555a212d00 brk(0x55555a233d00) = 0x55555a233d00 brk(0x55555a234000) = 0x55555a234000 mprotect(0x7fd44b01f000, 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 5835 attached , child_tidptr=0x55555a212650) = 5835 [pid 5835] set_robust_list(0x55555a212660, 24) = 0 [pid 5835] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5835] setpgid(0, 0) = 0 [pid 5835] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5835] write(3, "1000", 4) = 4 [pid 5835] close(3) = 0 [pid 5835] write(1, "executing program\n", 18executing program ) = 18 [pid 5835] memfd_create("syzkaller", 0) = 3 [pid 5835] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd442a00000 [pid 5835] 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 5835] munmap(0x7fd442a00000, 138412032) = 0 [pid 5835] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5835] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5835] close(3) = 0 [pid 5835] close(4) = 0 [pid 5835] mkdir("./bus", 0777) = 0 [pid 5835] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5835] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5835] chdir("./bus") = 0 [pid 5835] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 178.419333][ T5835] loop0: detected capacity change from 0 to 32768 [pid 5835] mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000 [pid 5833] kill(-5835, SIGKILL) = 0 [pid 5833] kill(5835, SIGKILL) = 0 [pid 5833] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5833] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5833] getdents64(3, 0x55555a2136f0 /* 2 entries */, 32768) = 48 [pid 5833] getdents64(3, 0x55555a2136f0 /* 0 entries */, 32768) = 0 [pid 5833] close(3) = 0 [ 430.003608][ T30] INFO: task kworker/u8:1:12 blocked for more than 143 seconds. [ 430.011525][ T30] Not tainted 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 [ 430.019248][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 430.028213][ T30] task:kworker/u8:1 state:D stack:23952 pid:12 tgid:12 ppid:2 flags:0x00004000 [ 430.038525][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 430.044635][ T30] Call Trace: [ 430.047926][ T30] [ 430.050872][ T30] __schedule+0x17fb/0x4be0 [ 430.055481][ T30] ? __pfx___schedule+0x10/0x10 [ 430.060348][ T30] ? __blk_flush_plug+0x449/0x500 [ 430.065466][ T30] ? __pfx_lock_release+0x10/0x10 [ 430.070516][ T30] ? kthread_data+0x52/0xd0 [ 430.075113][ T30] ? schedule+0x90/0x320 [ 430.079382][ T30] ? wq_worker_sleeping+0x66/0x240 [ 430.084567][ T30] ? schedule+0x90/0x320 [ 430.088831][ T30] schedule+0x14b/0x320 [ 430.093008][ T30] schedule_preempt_disabled+0x13/0x30 [ 430.098539][ T30] __mutex_lock+0x7e7/0xee0 [ 430.103085][ T30] ? __mutex_lock+0x5ef/0xee0 [ 430.107855][ T30] ? jfs_commit_inode+0x24a/0x590 [ 430.112907][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 430.118012][ T30] jfs_commit_inode+0x24a/0x590 [ 430.122886][ T30] ? __pfx_jfs_commit_inode+0x10/0x10 [ 430.128353][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 430.133887][ T30] jfs_write_inode+0x143/0x220 [ 430.138687][ T30] __writeback_single_inode+0x708/0x10d0 [ 430.145070][ T30] writeback_sb_inodes+0x820/0x1360 [ 430.150301][ T30] ? mark_lock+0x2ae/0x360 [ 430.155126][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 430.160825][ T30] ? __pfx___up_read+0x10/0x10 [ 430.166039][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 430.171103][ T30] __writeback_inodes_wb+0x11b/0x260 [ 430.176854][ T30] wb_writeback+0x427/0xb80 [ 430.181513][ T30] ? queue_io+0x3c1/0x5a0 [ 430.186259][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 430.191326][ T30] wb_workfn+0xc4b/0x1080 [ 430.196045][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 430.200850][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 430.207329][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 430.213988][ T30] ? process_scheduled_works+0x976/0x1840 [ 430.219744][ T30] process_scheduled_works+0xa66/0x1840 [ 430.225903][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 430.231930][ T30] ? assign_work+0x364/0x3d0 [ 430.236939][ T30] worker_thread+0x870/0xd30 [ 430.241568][ T30] ? __kthread_parkme+0x169/0x1d0 [ 430.247034][ T30] ? __pfx_worker_thread+0x10/0x10 [ 430.252165][ T30] kthread+0x2f0/0x390 [ 430.257205][ T30] ? __pfx_worker_thread+0x10/0x10 [ 430.262350][ T30] ? __pfx_kthread+0x10/0x10 [ 430.267347][ T30] ret_from_fork+0x4b/0x80 [ 430.271786][ T30] ? __pfx_kthread+0x10/0x10 [ 430.276734][ T30] ret_from_fork_asm+0x1a/0x30 [ 430.281544][ T30] [ 430.285155][ T30] [ 430.285155][ T30] Showing all locks held in the system: [ 430.292885][ T30] 4 locks held by kworker/u8:1/12: [ 430.298599][ T30] #0: ffff888020ee2948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 [ 430.310148][ T30] #1: ffffc90000117d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 [ 430.322877][ T30] #2: ffff88807bf3c0e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x22/0xf0 [ 430.333732][ T30] #3: ffff888073cd2fe0 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x24a/0x590 [ 430.344386][ T30] 1 lock held by khungtaskd/30: [ 430.349250][ T30] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 [ 430.359589][ T30] 2 locks held by getty/5575: [ 430.365011][ T30] #0: ffff88814e2980a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.375069][ T30] #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 [ 430.385628][ T30] 4 locks held by syz-executor196/5835: [ 430.391193][ T30] [ 430.393914][ T30] ============================================= [ 430.393914][ T30] [ 430.402352][ T30] NMI backtrace for cpu 1 [ 430.406694][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 [ 430.417633][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 430.427696][ T30] Call Trace: [ 430.430981][ T30] [ 430.433920][ T30] dump_stack_lvl+0x241/0x360 [ 430.438613][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.443828][ T30] ? __pfx__printk+0x10/0x10 [ 430.448438][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 430.453392][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.458857][ T30] ? _printk+0xd5/0x120 [ 430.463025][ T30] ? __pfx__printk+0x10/0x10 [ 430.467623][ T30] ? __wake_up_klogd+0xcc/0x110 [ 430.472486][ T30] ? __pfx__printk+0x10/0x10 [ 430.477096][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 430.482137][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.488135][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 430.494131][ T30] watchdog+0xff6/0x1040 [ 430.498384][ T30] ? watchdog+0x1ea/0x1040 [ 430.502816][ T30] ? __pfx_watchdog+0x10/0x10 [ 430.507500][ T30] kthread+0x2f0/0x390 [ 430.511588][ T30] ? __pfx_watchdog+0x10/0x10 [ 430.516315][ T30] ? __pfx_kthread+0x10/0x10 [ 430.520938][ T30] ret_from_fork+0x4b/0x80 [ 430.525381][ T30] ? __pfx_kthread+0x10/0x10 [ 430.529995][ T30] ret_from_fork_asm+0x1a/0x30 [ 430.534795][ T30] [ 430.537973][ T30] Sending NMI from CPU 1 to CPUs 0: [ 430.543215][ C0] NMI backtrace for cpu 0 [ 430.543234][ C0] CPU: 0 UID: 0 PID: 5835 Comm: syz-executor196 Not tainted 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 [ 430.543254][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 430.543267][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 [ 430.543290][ C0] Code: 8b 3d c4 9f 8d 0c 48 89 de 5b e9 03 66 58 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 80 d4 03 00 65 8b 15 d0 60 64 7e 81 e2 00 01 ff 00 [ 430.543303][ C0] RSP: 0018:ffffc900040ef498 EFLAGS: 00000246 [ 430.543319][ C0] RAX: ffffffff832f4dce RBX: ffff88807e38e000 RCX: ffff88807bd6da00 [ 430.543331][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 430.543342][ C0] RBP: ffffc900040ef690 R08: ffffffff832f4da0 R09: 0000000000000000 [ 430.543353][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1100fc71c00 [ 430.543364][ C0] R13: dffffc0000000000 R14: ffff888073cd3248 R15: 0000000000000000 [ 430.543375][ C0] FS: 000055555a212380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 430.543390][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.543401][ C0] CR2: 0000560203dcc680 CR3: 0000000076398000 CR4: 00000000003526f0 [ 430.543416][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 430.543425][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 430.543435][ C0] Call Trace: [ 430.543441][ C0] [ 430.543448][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 430.543470][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 430.543489][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.543506][ C0] ? nmi_handle+0x2a/0x5a0 [ 430.543537][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 430.543560][ C0] ? nmi_handle+0x14f/0x5a0 [ 430.543577][ C0] ? nmi_handle+0x2a/0x5a0 [ 430.543594][ C0] ? __sanitizer_cov_trace_pc+0x8/0x70 [ 430.543609][ C0] ? default_do_nmi+0x63/0x160 [ 430.543628][ C0] ? exc_nmi+0x123/0x1f0 [ 430.543644][ C0] ? end_repeat_nmi+0xf/0x53 [ 430.543661][ C0] ? dtSplitRoot+0x8b0/0x1930 [ 430.543681][ C0] ? dtSplitRoot+0x8de/0x1930 [ 430.543702][ C0] ? __sanitizer_cov_trace_pc+0x8/0x70 [ 430.543717][ C0] ? __sanitizer_cov_trace_pc+0x8/0x70 [ 430.543734][ C0] ? __sanitizer_cov_trace_pc+0x8/0x70 [ 430.543749][ C0] [ 430.543754][ C0] [ 430.543760][ C0] dtSplitRoot+0x8de/0x1930 [ 430.543792][ C0] ? __pfx_dtSplitRoot+0x10/0x10 [ 430.543812][ C0] ? __pfx_dbAlloc+0x10/0x10 [ 430.543829][ C0] ? __kasan_kmalloc+0x98/0xb0 [ 430.543851][ C0] ? __kmalloc_cache_noprof+0x243/0x390 [ 430.543867][ C0] ? dtInsert+0x857/0x6c10 [ 430.543887][ C0] dtInsert+0x12cd/0x6c10 [ 430.543922][ C0] ? __pfx_dtInsert+0x10/0x10 [ 430.543943][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 430.543960][ C0] ? txLock+0x2b3/0x1cf0 [ 430.543975][ C0] ? __pfx_lock_release+0x10/0x10 [ 430.543990][ C0] ? do_raw_spin_lock+0x14f/0x370 [ 430.544016][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 430.544038][ C0] ? kfree+0x196/0x430 [ 430.544060][ C0] ? dtSearch+0x1d59/0x2520 [ 430.544096][ C0] jfs_create+0x7ba/0xbb0 [ 430.544121][ C0] ? __pfx_jfs_create+0x10/0x10 [ 430.544158][ C0] ? bpf_lsm_inode_create+0x9/0x10 [ 430.544177][ C0] ? security_inode_create+0xbe/0x340 [ 430.544202][ C0] vfs_create+0x23c/0x3d0 [ 430.544223][ C0] do_mknodat+0x447/0x5b0 [ 430.544241][ C0] ? __pfx_do_mknodat+0x10/0x10 [ 430.544259][ C0] ? getname_flags+0x1e3/0x540 [ 430.544275][ C0] __x64_sys_mknod+0x8c/0xa0 [ 430.544295][ C0] do_syscall_64+0xf3/0x230 [ 430.544318][ C0] ? clear_bhb_loop+0x35/0x90 [ 430.544334][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.544357][ C0] RIP: 0033:0x7fd44afa5a59 [ 430.544380][ C0] 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 [ 430.544393][ C0] RSP: 002b:00007ffe91638448 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 [ 430.544409][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd44afa5a59 [ 430.544421][ C0] RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000000020000000 [ 430.544431][ C0] RBP: 00007fd44b01f5f0 R08: 0000000000006152 R09: 000055555a2134c0 [ 430.544442][ C0] R10: 00007ffe91638310 R11: 0000000000000246 R12: 00007ffe91638470 [ 430.544454][ C0] R13: 00007ffe91638698 R14: 431bde82d7b634db R15: 00007fd44afee03b [ 430.544472][ C0] [ 430.544479][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.265 msecs [ 430.984560][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 430.991427][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00209-g499551201b5f #0 [ 431.001926][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 431.011973][ T30] Call Trace: [ 431.015247][ T30] [ 431.018187][ T30] dump_stack_lvl+0x241/0x360 [ 431.022868][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 431.028061][ T30] ? __pfx__printk+0x10/0x10 [ 431.032646][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 431.038625][ T30] ? vscnprintf+0x5d/0x90 [ 431.042951][ T30] panic+0x349/0x880 [ 431.046844][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 431.052994][ T30] ? __pfx_panic+0x10/0x10 [ 431.057411][ T30] ? tick_nohz_tick_stopped+0x82/0xb0 [ 431.062870][ T30] ? __irq_work_queue_local+0x137/0x410 [ 431.068413][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 431.073782][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 431.079933][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 431.086173][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 431.092323][ T30] watchdog+0x1035/0x1040 [ 431.096657][ T30] ? watchdog+0x1ea/0x1040 [ 431.101073][ T30] ? __pfx_watchdog+0x10/0x10 [ 431.105743][ T30] kthread+0x2f0/0x390 [ 431.109808][ T30] ? __pfx_watchdog+0x10/0x10 [ 431.114486][ T30] ? __pfx_kthread+0x10/0x10 [ 431.119252][ T30] ret_from_fork+0x4b/0x80 [ 431.123682][ T30] ? __pfx_kthread+0x10/0x10 [ 431.128267][ T30] ret_from_fork_asm+0x1a/0x30 [ 431.133045][ T30] [ 431.136337][ T30] Kernel Offset: disabled [ 431.140661][ T30] Rebooting in 86400 seconds..