./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor587518632 <...> Warning: Permanently added '10.128.0.122' (ED25519) to the list of known hosts. execve("./syz-executor587518632", ["./syz-executor587518632"], 0x7ffc24cb31a0 /* 10 vars */) = 0 brk(NULL) = 0x555559ad6000 brk(0x555559ad6d00) = 0x555559ad6d00 arch_prctl(ARCH_SET_FS, 0x555559ad6380) = 0 set_tid_address(0x555559ad6650) = 5249 set_robust_list(0x555559ad6660, 24) = 0 rseq(0x555559ad6ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor587518632", 4096) = 27 getrandom("\x30\x94\xc4\x36\x5f\xf1\xd9\xbb", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555559ad6d00 brk(0x555559af7d00) = 0x555559af7d00 brk(0x555559af8000) = 0x555559af8000 mprotect(0x7f7f80780000, 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 5251 attached [pid 5251] set_robust_list(0x555559ad6660, 24) = 0 [pid 5251] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5251] setpgid(0, 0 [pid 5249] <... clone resumed>, child_tidptr=0x555559ad6650) = 5251 [pid 5251] <... setpgid resumed>) = 0 [pid 5251] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5251] write(3, "1000", 4) = 4 [pid 5251] close(3) = 0 executing program [pid 5251] write(1, "executing program\n", 18) = 18 [pid 5251] memfd_create("syzkaller", 0) = 3 [pid 5251] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7f78200000 [pid 5251] 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 5251] munmap(0x7f7f78200000, 138412032) = 0 [pid 5251] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5251] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5251] close(3) = 0 [pid 5251] close(4) = 0 [pid 5251] mkdir("./bus", 0777) = 0 [pid 5251] mount("/dev/loop0", "./bus", "jfs", 0, "") = 0 [pid 5251] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 5251] chdir("./bus") = 0 [pid 5251] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 391.116578][ T5251] loop0: detected capacity change from 0 to 32768 [pid 5251] mkdir("\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", 0777 [pid 5249] kill(-5251, SIGKILL) = 0 [pid 5249] kill(5251, SIGKILL) = 0 [pid 5249] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5249] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5249] getdents64(3, 0x555559ad76f0 /* 2 entries */, 32768) = 48 [pid 5249] getdents64(3, 0x555559ad76f0 /* 0 entries */, 32768) = 0 [pid 5249] close(3) = 0 [ 573.380684][ T30] INFO: task kworker/u8:1:12 blocked for more than 143 seconds. [ 573.388516][ T30] Not tainted 6.12.0-rc2-syzkaller #0 [ 573.394845][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 573.404013][ T30] task:kworker/u8:1 state:D stack:22104 pid:12 tgid:12 ppid:2 flags:0x00004000 [ 573.414437][ T30] Workqueue: writeback wb_workfn (flush-7:0) [ 573.420709][ T30] Call Trace: [ 573.424003][ T30] [ 573.426945][ T30] __schedule+0x1843/0x4ae0 [ 573.431757][ T30] ? __pfx___schedule+0x10/0x10 [ 573.436631][ T30] ? __blk_flush_plug+0x449/0x500 [ 573.441978][ T30] ? __pfx_lock_release+0x10/0x10 [ 573.447032][ T30] ? __mutex_trylock_common+0x92/0x2e0 [ 573.452824][ T30] ? kthread_data+0x52/0xd0 [ 573.457352][ T30] ? schedule+0x90/0x320 [ 573.461817][ T30] ? wq_worker_sleeping+0x66/0x240 [ 573.466957][ T30] ? schedule+0x90/0x320 [ 573.471413][ T30] schedule+0x14b/0x320 [ 573.475598][ T30] schedule_preempt_disabled+0x13/0x30 [ 573.481360][ T30] __mutex_lock+0x6a7/0xd70 [ 573.485884][ T30] ? __mutex_lock+0x52a/0xd70 [ 573.490839][ T30] ? jfs_commit_inode+0x24a/0x590 [ 573.495893][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 573.501224][ T30] jfs_commit_inode+0x24a/0x590 [ 573.506107][ T30] ? __pfx_jfs_commit_inode+0x10/0x10 [ 573.512229][ T30] ? do_raw_spin_unlock+0x13c/0x8b0 [ 573.517547][ T30] jfs_write_inode+0x143/0x220 [ 573.522590][ T30] __writeback_single_inode+0x711/0x10d0 [ 573.528252][ T30] writeback_sb_inodes+0x80c/0x1370 [ 573.533678][ T30] ? mark_lock+0x2ae/0x360 [ 573.538150][ T30] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 573.544030][ T30] ? __pfx___up_read+0x10/0x10 [ 573.548816][ T30] ? do_raw_spin_lock+0x14f/0x370 [ 573.554261][ T30] __writeback_inodes_wb+0x11b/0x260 [ 573.559580][ T30] wb_writeback+0x42f/0xbd0 [ 573.564326][ T30] ? queue_io+0x321/0x5a0 [ 573.568686][ T30] ? __pfx_wb_writeback+0x10/0x10 [ 573.573964][ T30] wb_workfn+0xc58/0x1090 [ 573.578339][ T30] ? __pfx_wb_workfn+0x10/0x10 [ 573.583375][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 573.589408][ T30] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 573.596075][ T30] ? process_scheduled_works+0x976/0x1850 [ 573.602012][ T30] process_scheduled_works+0xa63/0x1850 [ 573.607649][ T30] ? __pfx_process_scheduled_works+0x10/0x10 [ 573.613972][ T30] ? assign_work+0x364/0x3d0 [ 573.618605][ T30] worker_thread+0x870/0xd30 [ 573.624157][ T30] ? __kthread_parkme+0x169/0x1d0 [ 573.629254][ T30] ? __pfx_worker_thread+0x10/0x10 [ 573.634911][ T30] kthread+0x2f0/0x390 [ 573.639013][ T30] ? __pfx_worker_thread+0x10/0x10 [ 573.644543][ T30] ? __pfx_kthread+0x10/0x10 [ 573.649157][ T30] ret_from_fork+0x4b/0x80 [ 573.654000][ T30] ? __pfx_kthread+0x10/0x10 [ 573.658616][ T30] ret_from_fork_asm+0x1a/0x30 [ 573.663809][ T30] [ 573.667005][ T30] [ 573.667005][ T30] Showing all locks held in the system: [ 573.675263][ T30] 4 locks held by kworker/u8:1/12: [ 573.680384][ T30] #0: ffff8880202eb148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 [ 573.692393][ T30] #1: ffffc90000117d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 [ 573.705144][ T30] #2: ffff88807b4d80e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 [ 573.716145][ T30] #3: ffff8880720e2fe0 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 [ 573.726851][ T30] 1 lock held by khungtaskd/30: [ 573.732284][ T30] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 [ 573.742677][ T30] 2 locks held by getty/4977: [ 573.747369][ T30] #0: ffff88802f38e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 573.757855][ T30] #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 [ 573.768512][ T30] 4 locks held by syz-executor587/5251: [ 573.774344][ T30] [ 573.776680][ T30] ============================================= [ 573.776680][ T30] [ 573.785717][ T30] NMI backtrace for cpu 1 [ 573.790132][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller #0 [ 573.798905][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 573.808968][ T30] Call Trace: [ 573.812254][ T30] [ 573.815194][ T30] dump_stack_lvl+0x241/0x360 [ 573.819919][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 573.825151][ T30] ? __pfx__printk+0x10/0x10 [ 573.829791][ T30] nmi_cpu_backtrace+0x49c/0x4d0 [ 573.834757][ T30] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 573.840251][ T30] ? _printk+0xd5/0x120 [ 573.844444][ T30] ? __pfx__printk+0x10/0x10 [ 573.849055][ T30] ? __wake_up_klogd+0xcc/0x110 [ 573.854015][ T30] ? __pfx__printk+0x10/0x10 [ 573.858823][ T30] ? __rcu_read_unlock+0xa1/0x110 [ 573.863972][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 573.870051][ T30] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 573.876048][ T30] watchdog+0xff4/0x1040 [ 573.880304][ T30] ? watchdog+0x1ea/0x1040 [ 573.884766][ T30] ? __pfx_watchdog+0x10/0x10 [ 573.889473][ T30] kthread+0x2f0/0x390 [ 573.893568][ T30] ? __pfx_watchdog+0x10/0x10 [ 573.898262][ T30] ? __pfx_kthread+0x10/0x10 [ 573.902866][ T30] ret_from_fork+0x4b/0x80 [ 573.907294][ T30] ? __pfx_kthread+0x10/0x10 [ 573.911894][ T30] ret_from_fork_asm+0x1a/0x30 [ 573.916687][ T30] [ 573.919845][ T30] Sending NMI from CPU 1 to CPUs 0: [ 573.925190][ C0] NMI backtrace for cpu 0 [ 573.925202][ C0] CPU: 0 UID: 0 PID: 5251 Comm: syz-executor587 Not tainted 6.12.0-rc2-syzkaller #0 [ 573.925221][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 573.925238][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 [ 573.925264][ C0] Code: 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 d7 03 00 65 8b 15 50 f1 6e 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 [ 573.925280][ C0] RSP: 0018:ffffc90004087498 EFLAGS: 00000246 [ 573.925295][ C0] RAX: ffffffff832ad09e RBX: ffff88807662a000 RCX: ffff88807f558000 [ 573.925308][ C0] RDX: 0000000080000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 573.925318][ C0] RBP: ffffc90004087690 R08: ffffffff832ad070 R09: 0000000000000000 [ 573.925329][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1100ecc5400 [ 573.925340][ C0] R13: dffffc0000000000 R14: ffff8880720e3248 R15: 0000000000000000 [ 573.925351][ C0] FS: 0000555559ad6380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 [ 573.925365][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 573.925376][ C0] CR2: 00005650d3f277f0 CR3: 000000007d3aa000 CR4: 00000000003526f0 [ 573.925389][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 573.925399][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 573.925408][ C0] Call Trace: [ 573.925416][ C0] [ 573.925423][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 573.925443][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 573.925467][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 573.925485][ C0] ? nmi_handle+0x2a/0x5a0 [ 573.925507][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 573.925528][ C0] ? nmi_handle+0x14f/0x5a0 [ 573.925544][ C0] ? nmi_handle+0x2a/0x5a0 [ 573.925560][ C0] ? __sanitizer_cov_trace_pc+0x18/0x70 [ 573.925579][ C0] ? default_do_nmi+0x63/0x160 [ 573.925598][ C0] ? exc_nmi+0x123/0x1f0 [ 573.925616][ C0] ? end_repeat_nmi+0xf/0x53 [ 573.925641][ C0] ? dtSplitRoot+0x8b0/0x1930 [ 573.925661][ C0] ? dtSplitRoot+0x8de/0x1930 [ 573.925682][ C0] ? __sanitizer_cov_trace_pc+0x18/0x70 [ 573.925701][ C0] ? __sanitizer_cov_trace_pc+0x18/0x70 [ 573.925721][ C0] ? __sanitizer_cov_trace_pc+0x18/0x70 [ 573.925745][ C0] [ 573.925751][ C0] [ 573.925756][ C0] dtSplitRoot+0x8de/0x1930 [ 573.925788][ C0] ? __pfx_dtSplitRoot+0x10/0x10 [ 573.925809][ C0] ? __pfx_dbAlloc+0x10/0x10 [ 573.925827][ C0] ? __kasan_kmalloc+0x98/0xb0 [ 573.925848][ C0] ? dtInsert+0x857/0x6c10 [ 573.925867][ C0] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 573.925887][ C0] dtInsert+0x12cd/0x6c10 [ 573.925922][ C0] ? __pfx_dtInsert+0x10/0x10 [ 573.925943][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 573.925965][ C0] ? txLock+0x2b8/0x1f40 [ 573.925981][ C0] ? __pfx_lock_release+0x10/0x10 [ 573.926002][ C0] ? do_raw_spin_lock+0x14f/0x370 [ 573.926025][ C0] ? do_raw_spin_unlock+0x13c/0x8b0 [ 573.926062][ C0] ? dtInitRoot+0x234/0x6a0 [ 573.926083][ C0] jfs_mkdir+0x7fb/0xba0 [ 573.926101][ C0] ? __pfx_jfs_mkdir+0x10/0x10 [ 573.926126][ C0] ? generic_permission+0x1e0/0x550 [ 573.926145][ C0] ? bpf_lsm_inode_mkdir+0x9/0x10 [ 573.926166][ C0] ? security_inode_mkdir+0xbe/0x340 [ 573.926184][ C0] vfs_mkdir+0x2f9/0x4f0 [ 573.926206][ C0] do_mkdirat+0x264/0x3a0 [ 573.926224][ C0] ? __might_fault+0xaa/0x120 [ 573.926245][ C0] ? __pfx_do_mkdirat+0x10/0x10 [ 573.926263][ C0] ? strncpy_from_user+0x131/0x250 [ 573.926286][ C0] ? getname_flags+0x1e3/0x540 [ 573.926302][ C0] __x64_sys_mkdir+0x6c/0x80 [ 573.926322][ C0] do_syscall_64+0xf3/0x230 [ 573.926337][ C0] ? clear_bhb_loop+0x35/0x90 [ 573.926352][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 573.926374][ C0] RIP: 0033:0x7f7f80705ad7 [ 573.926392][ C0] Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 573.926404][ C0] RSP: 002b:00007ffd57a1f448 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 573.926420][ C0] RAX: ffffffffffffffda RBX: 0000000020000e80 RCX: 00007f7f80705ad7 [ 573.926431][ C0] RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000e80 [ 573.926441][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 573.926450][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd57a1f4e0 [ 573.926460][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 573.926476][ C0] [ 573.926483][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.293 msecs [ 574.377949][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 574.384894][ T30] CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller #0 [ 574.393674][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 574.403736][ T30] Call Trace: [ 574.407024][ T30] [ 574.409962][ T30] dump_stack_lvl+0x241/0x360 [ 574.414676][ T30] ? __pfx_dump_stack_lvl+0x10/0x10 [ 574.419909][ T30] ? __pfx__printk+0x10/0x10 [ 574.424530][ T30] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 574.430798][ T30] ? vscnprintf+0x5d/0x90 [ 574.435146][ T30] panic+0x349/0x880 [ 574.439065][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 574.445230][ T30] ? __pfx_panic+0x10/0x10 [ 574.449679][ T30] ? tick_nohz_tick_stopped+0x82/0xb0 [ 574.455167][ T30] ? __irq_work_queue_local+0x137/0x410 [ 574.460733][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 574.466121][ T30] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 574.472285][ T30] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 574.478448][ T30] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 574.484612][ T30] watchdog+0x1033/0x1040 [ 574.488956][ T30] ? watchdog+0x1ea/0x1040 [ 574.493396][ T30] ? __pfx_watchdog+0x10/0x10 [ 574.498083][ T30] kthread+0x2f0/0x390 [ 574.502180][ T30] ? __pfx_watchdog+0x10/0x10 [ 574.506878][ T30] ? __pfx_kthread+0x10/0x10 [ 574.511481][ T30] ret_from_fork+0x4b/0x80 [ 574.515918][ T30] ? __pfx_kthread+0x10/0x10 [ 574.520604][ T30] ret_from_fork_asm+0x1a/0x30 [ 574.525393][ T30] [ 574.528721][ T30] Kernel Offset: disabled [ 574.533048][ T30] Rebooting in 86400 seconds..