./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2712261476 <...> Warning: Permanently added '10.128.1.67' (ED25519) to the list of known hosts. execve("./syz-executor2712261476", ["./syz-executor2712261476"], 0x7ffee1e83cd0 /* 10 vars */) = 0 brk(NULL) = 0x555569c16000 brk(0x555569c16d00) = 0x555569c16d00 arch_prctl(ARCH_SET_FS, 0x555569c16380) = 0 set_tid_address(0x555569c16650) = 5839 set_robust_list(0x555569c16660, 24) = 0 rseq(0x555569c16ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2712261476", 4096) = 28 getrandom("\x48\x00\x53\xd9\xde\x2a\x31\x7e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555569c16d00 brk(0x555569c37d00) = 0x555569c37d00 brk(0x555569c38000) = 0x555569c38000 mprotect(0x7f1661c8a000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 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 5840 attached [pid 5840] set_robust_list(0x555569c16660, 24) = 0 [pid 5839] <... clone resumed>, child_tidptr=0x555569c16650) = 5840 [pid 5840] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5840] setpgid(0, 0) = 0 [pid 5840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5840] write(3, "1000", 4) = 4 [pid 5840] close(3) = 0 [pid 5840] write(1, "executing program\n", 18executing program ) = 18 [pid 5840] memfd_create("syzkaller", 0) = 3 [pid 5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1659600000 [pid 5840] 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 5840] munmap(0x7f1659600000, 138412032) = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5840] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5840] close(3) = 0 [pid 5840] close(4) = 0 [pid 5840] mkdir("./bus", 0777) = 0 [pid 5840] mount("/dev/loop0", "./bus", "jfs", MS_NOSUID|MS_NOEXEC, "") = 0 [pid 5840] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 syzkaller login: [ 78.637765][ T5840] loop0: detected capacity change from 0 to 32768 [pid 5840] chdir("./bus") = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5840] rename("./file0/../file0", "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" [pid 5839] kill(-5840, SIGKILL) = 0 [pid 5839] kill(5840, SIGKILL) = 0 [pid 5839] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5839] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5839] getdents64(3, 0x555569c176f0 /* 2 entries */, 32768) = 48 [pid 5839] getdents64(3, 0x555569c176f0 /* 0 entries */, 32768) = 0 [pid 5839] close(3) = 0 [ 86.847311][ T24] cfg80211: failed to load regulatory.db [ 286.525256][ T31] INFO: task kworker/u8:3:49 blocked for more than 143 seconds. [ 286.533091][ T31] Not tainted 6.16.0-rc7-syzkaller-00127-g302f88ff3584 #0 [ 286.541484][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.550441][ T31] task:kworker/u8:3 state:D stack:20808 pid:49 tgid:49 ppid:2 task_flags:0x4208060 flags:0x00004000 [ 286.563051][ T31] Workqueue: writeback wb_workfn (flush-7:0) [ 286.569402][ T31] Call Trace: [ 286.572789][ T31] [ 286.576067][ T31] __schedule+0x16aa/0x4c90 [ 286.580602][ T31] ? blk_mq_flush_plug_list+0x48b/0x550 [ 286.586617][ T31] ? __pfx_blk_mq_flush_plug_list+0x10/0x10 [ 286.592573][ T31] ? schedule+0x165/0x360 [ 286.597421][ T31] ? __pfx___schedule+0x10/0x10 [ 286.602336][ T31] ? schedule+0x91/0x360 [ 286.607099][ T31] schedule+0x165/0x360 [ 286.611296][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.617150][ T31] __mutex_lock+0x724/0xe80 [ 286.621684][ T31] ? __mutex_lock+0x51b/0xe80 [ 286.626717][ T31] ? jfs_commit_inode+0x1ca/0x530 [ 286.631770][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.637180][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.642315][ T31] jfs_commit_inode+0x1ca/0x530 [ 286.648008][ T31] ? __pfx_jfs_commit_inode+0x10/0x10 [ 286.653432][ T31] jfs_write_inode+0x145/0x220 [ 286.658588][ T31] __writeback_single_inode+0x6f1/0xff0 [ 286.664170][ T31] writeback_sb_inodes+0x6b5/0x1000 [ 286.669885][ T31] ? __pfx_writeback_sb_inodes+0x10/0x10 [ 286.675814][ T31] ? __pfx___up_read+0x10/0x10 [ 286.680791][ T31] __writeback_inodes_wb+0x111/0x240 [ 286.686582][ T31] wb_writeback+0x44f/0xaf0 [ 286.691131][ T31] ? queue_io+0x3d1/0x590 [ 286.695867][ T31] ? __pfx_wb_writeback+0x10/0x10 [ 286.701023][ T31] wb_workfn+0xaef/0xef0 [ 286.705617][ T31] ? __pfx_wb_workfn+0x10/0x10 [ 286.710672][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.715938][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 286.721686][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.727381][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 286.733133][ T31] ? process_scheduled_works+0x9ef/0x17b0 [ 286.739209][ T31] process_scheduled_works+0xade/0x17b0 [ 286.744894][ T31] ? __pfx_process_scheduled_works+0x10/0x10 [ 286.751275][ T31] worker_thread+0x8a0/0xda0 [ 286.756487][ T31] kthread+0x70e/0x8a0 [ 286.760586][ T31] ? __pfx_worker_thread+0x10/0x10 [ 286.766355][ T31] ? __pfx_kthread+0x10/0x10 [ 286.770981][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.776595][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.781821][ T31] ? __pfx_kthread+0x10/0x10 [ 286.786934][ T31] ret_from_fork+0x3fc/0x770 [ 286.791551][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.797027][ T31] ? __switch_to_asm+0x39/0x70 [ 286.801813][ T31] ? __switch_to_asm+0x33/0x70 [ 286.806914][ T31] ? __pfx_kthread+0x10/0x10 [ 286.811532][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.816768][ T31] [ 286.823262][ T31] [ 286.823262][ T31] Showing all locks held in the system: [ 286.831730][ T31] 1 lock held by khungtaskd/31: [ 286.836858][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.847120][ T31] 4 locks held by kworker/u8:3/49: [ 286.852251][ T31] #0: ffff8880202b8948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 286.864097][ T31] #1: ffffc90000b97bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 286.877099][ T31] #2: ffff888077a880e0 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 [ 286.888361][ T31] #3: ffff8880764e2fe0 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530 [ 286.899129][ T31] 2 locks held by getty/5597: [ 286.903820][ T31] #0: ffff8880351820a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.914079][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.924506][ T31] 4 locks held by syz-executor271/5840: [ 286.930414][ T31] [ 286.932750][ T31] ============================================= [ 286.932750][ T31] [ 286.941856][ T31] NMI backtrace for cpu 0 [ 286.941878][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-00127-g302f88ff3584 #0 PREEMPT(full) [ 286.941902][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 286.941913][ T31] Call Trace: [ 286.941921][ T31] [ 286.941929][ T31] dump_stack_lvl+0x189/0x250 [ 286.941953][ T31] ? __wake_up_klogd+0xd9/0x110 [ 286.941982][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.942004][ T31] ? __pfx__printk+0x10/0x10 [ 286.942042][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.942074][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.942098][ T31] ? _printk+0xcf/0x120 [ 286.942127][ T31] ? __pfx__printk+0x10/0x10 [ 286.942153][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.942185][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.942216][ T31] watchdog+0xfee/0x1030 [ 286.942246][ T31] ? watchdog+0x1de/0x1030 [ 286.942282][ T31] kthread+0x70e/0x8a0 [ 286.942311][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.942337][ T31] ? __pfx_kthread+0x10/0x10 [ 286.942373][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.942391][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.942409][ T31] ? __pfx_kthread+0x10/0x10 [ 286.942435][ T31] ret_from_fork+0x3fc/0x770 [ 286.942458][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.942483][ T31] ? __switch_to_asm+0x39/0x70 [ 286.942505][ T31] ? __switch_to_asm+0x33/0x70 [ 286.942527][ T31] ? __pfx_kthread+0x10/0x10 [ 286.942554][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.942594][ T31] [ 286.942601][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.100161][ C1] NMI backtrace for cpu 1 [ 287.100250][ C1] CPU: 1 UID: 0 PID: 5840 Comm: syz-executor271 Not tainted 6.16.0-rc7-syzkaller-00127-g302f88ff3584 #0 PREEMPT(full) [ 287.100271][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.100281][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 [ 287.100309][ C1] Code: 8b 3d 74 6e fa 0b 48 89 de 5b e9 33 20 55 00 cc cc cc 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 08 90 9c 92 65 8b 15 58 6a dc 10 81 e2 00 01 ff 00 [ 287.100322][ C1] RSP: 0018:ffffc9000409f440 EFLAGS: 00000246 [ 287.100337][ C1] RAX: ffffffff833b59f6 RBX: 0000000000000004 RCX: ffff88802ad3bc00 [ 287.100350][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff [ 287.100359][ C1] RBP: ffff88807191c000 R08: 00000000000001ff R09: 0000000000000000 [ 287.100370][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 287.100380][ C1] R13: 1ffff1100e323800 R14: 0000000000000000 R15: 1ffff1100e323802 [ 287.100392][ C1] FS: 0000555569c16380(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000 [ 287.100406][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.100417][ C1] CR2: 00005633a6b105a0 CR3: 000000003375e000 CR4: 00000000003526f0 [ 287.100432][ C1] Call Trace: [ 287.100440][ C1] [ 287.100446][ C1] dtSplitRoot+0x7a6/0x16c0 [ 287.100484][ C1] dtInsert+0xef8/0x5f40 [ 287.100512][ C1] ? kasan_quarantine_put+0xdd/0x220 [ 287.100536][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.100559][ C1] ? __pfx_dtInsert+0x10/0x10 [ 287.100577][ C1] ? dtSearch+0x1d29/0x21b0 [ 287.100611][ C1] jfs_rename+0x7bc/0x1610 [ 287.100633][ C1] ? __lock_acquire+0xab9/0xd20 [ 287.100651][ C1] ? __pfx_jfs_rename+0x10/0x10 [ 287.100683][ C1] ? __lock_acquire+0xab9/0xd20 [ 287.100700][ C1] ? do_raw_spin_lock+0x121/0x290 [ 287.100726][ C1] ? do_raw_spin_unlock+0x122/0x240 [ 287.100746][ C1] ? __pfx_jfs_rename+0x10/0x10 [ 287.100768][ C1] vfs_rename+0xb99/0xec0 [ 287.100790][ C1] ? __pfx_vfs_rename+0x10/0x10 [ 287.100808][ C1] ? d_alloc+0x144/0x190 [ 287.100828][ C1] ? bpf_lsm_path_rename+0x9/0x20 [ 287.100851][ C1] ? security_path_rename+0x17d/0x490 [ 287.100877][ C1] do_renameat2+0x878/0xc50 [ 287.100901][ C1] ? __pfx_do_renameat2+0x10/0x10 [ 287.100922][ C1] ? strncpy_from_user+0x150/0x290 [ 287.100947][ C1] ? getname_flags+0x1e5/0x540 [ 287.100967][ C1] __x64_sys_rename+0x82/0x90 [ 287.100984][ C1] do_syscall_64+0xfa/0x3b0 [ 287.101002][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.101018][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.101034][ C1] ? clear_bhb_loop+0x60/0xb0 [ 287.101052][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.101068][ C1] RIP: 0033:0x7f1661c10b99 [ 287.101089][ 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 [ 287.101110][ C1] RSP: 002b:00007ffe018395a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 287.101126][ C1] RAX: ffffffffffffffda RBX: 0000200000000190 RCX: 00007f1661c10b99 [ 287.101138][ C1] RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000180 [ 287.101149][ C1] RBP: 00007f1661c8a5f0 R08: 0000000000006192 R09: 0000555569c174c0 [ 287.101160][ C1] R10: 00007ffe01839470 R11: 0000000000000246 R12: 00007ffe018395d0 [ 287.101170][ C1] R13: 00007ffe018397f8 R14: 431bde82d7b634db R15: 00007f1661c5903b [ 287.101190][ C1] [ 287.101197][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.038 msecs [ 287.102163][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.462997][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc7-syzkaller-00127-g302f88ff3584 #0 PREEMPT(full) [ 287.474803][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.484854][ T31] Call Trace: [ 287.488171][ T31] [ 287.491097][ T31] dump_stack_lvl+0x99/0x250 [ 287.495691][ T31] ? __asan_memcpy+0x40/0x70 [ 287.500287][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.505486][ T31] ? __pfx__printk+0x10/0x10 [ 287.510089][ T31] panic+0x2db/0x790 [ 287.513987][ T31] ? __pfx_panic+0x10/0x10 [ 287.518488][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.524297][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.529675][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.535841][ T31] watchdog+0x102d/0x1030 [ 287.540178][ T31] ? watchdog+0x1de/0x1030 [ 287.544613][ T31] kthread+0x70e/0x8a0 [ 287.548695][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.553387][ T31] ? __pfx_kthread+0x10/0x10 [ 287.557978][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.563176][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.568372][ T31] ? __pfx_kthread+0x10/0x10 [ 287.573092][ T31] ret_from_fork+0x3fc/0x770 [ 287.577683][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.582792][ T31] ? __switch_to_asm+0x39/0x70 [ 287.587676][ T31] ? __switch_to_asm+0x33/0x70 [ 287.592446][ T31] ? __pfx_kthread+0x10/0x10 [ 287.597039][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.601821][ T31] [ 287.605144][ T31] Kernel Offset: disabled [ 287.609462][ T31] Rebooting in 86400 seconds..