./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor690165503 <...> Warning: Permanently added '10.128.1.187' (ED25519) to the list of known hosts. execve("./syz-executor690165503", ["./syz-executor690165503"], 0x7ffd65f81150 /* 10 vars */) = 0 brk(NULL) = 0x55555fd74000 brk(0x55555fd74d40) = 0x55555fd74d40 arch_prctl(ARCH_SET_FS, 0x55555fd743c0) = 0 set_tid_address(0x55555fd74690) = 5859 set_robust_list(0x55555fd746a0, 24) = 0 rseq(0x55555fd74ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor690165503", 4096) = 27 getrandom("\xc0\x1d\x18\x94\x22\x76\x2a\xa1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555fd74d40 brk(0x55555fd95d40) = 0x55555fd95d40 brk(0x55555fd96000) = 0x55555fd96000 mprotect(0x7f84630b9000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5860 attached , child_tidptr=0x55555fd74690) = 5860 [pid 5860] set_robust_list(0x55555fd746a0, 24) = 0 [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5860] setpgid(0, 0) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5860] write(3, "1000", 4) = 4 [pid 5860] close(3) = 0 [pid 5860] write(1, "executing program\n", 18executing program ) = 18 [pid 5860] futex(0x7f84630bf32c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5860] rt_sigaction(SIGRT_1, {sa_handler=0x7f846305b2a0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f846304c920}, NULL, 8) = 0 [pid 5860] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5860] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8462fce000 [pid 5860] mprotect(0x7f8462fcf000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5860] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5860] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f8462fee990, parent_tid=0x7f8462fee990, exit_signal=0, stack=0x7f8462fce000, stack_size=0x20300, tls=0x7f8462fee6c0}./strace-static-x86_64: Process 5861 attached [pid 5861] rseq(0x7f8462feefe0, 0x20, 0, 0x53053053 [pid 5860] <... clone3 resumed> => {parent_tid=[5861]}, 88) = 5861 [pid 5861] <... rseq resumed>) = 0 [pid 5861] set_robust_list(0x7f8462fee9a0, 24) = 0 [pid 5861] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5861] futex(0x7f84630bf328, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5860] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5860] futex(0x7f84630bf328, FUTEX_WAKE_PRIVATE, 1000000 [pid 5861] <... futex resumed>) = 0 [pid 5860] <... futex resumed>) = 1 [pid 5861] openat(AT_FDCWD, "/dev/nullb0", O_RDWR|O_EXCL|O_NONBLOCK|O_LARGEFILE|O_NOATIME [pid 5860] futex(0x7f84630bf32c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5861] <... openat resumed>) = 3 [pid 5861] futex(0x7f84630bf32c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5860] <... futex resumed>) = 0 [pid 5861] futex(0x7f84630bf328, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5860] futex(0x7f84630bf328, FUTEX_WAKE_PRIVATE, 1000000 [pid 5861] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5860] <... futex resumed>) = 0 [pid 5861] sendfile(3, 3, NULL, 1125899906842687 [pid 5860] futex(0x7f84630bf32c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5860] futex(0x7f84630bf33c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5860] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8462fad000 [pid 5860] mprotect(0x7f8462fae000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5860] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5860] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f8462fcd990, parent_tid=0x7f8462fcd990, exit_signal=0, stack=0x7f8462fad000, stack_size=0x20300, tls=0x7f8462fcd6c0}./strace-static-x86_64: Process 5862 attached [pid 5862] rseq(0x7f8462fcdfe0, 0x20, 0, 0x53053053 [pid 5860] <... clone3 resumed> => {parent_tid=[5862]}, 88) = 5862 [pid 5862] <... rseq resumed>) = 0 [pid 5860] rt_sigprocmask(SIG_SETMASK, [], [pid 5862] set_robust_list(0x7f8462fcd9a0, 24 [pid 5860] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5862] <... set_robust_list resumed>) = 0 [pid 5862] rt_sigprocmask(SIG_SETMASK, [], [pid 5860] futex(0x7f84630bf338, FUTEX_WAKE_PRIVATE, 1000000 [pid 5862] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5860] <... futex resumed>) = 0 [pid 5862] dup(3) = 4 [pid 5860] futex(0x7f84630bf33c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5862] futex(0x7f84630bf33c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5860] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5860] futex(0x7f84630bf338, FUTEX_WAKE_PRIVATE, 1000000 [pid 5862] <... futex resumed>) = 0 [pid 5860] <... futex resumed>) = 0 [pid 5862] fallocate(4, FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE, 134217728, 2252074691592704 [pid 5860] futex(0x7f84630bf33c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5860] exit_group(0) = ? [pid 5859] kill(-5860, SIGKILL) = 0 [pid 5859] kill(5860, SIGKILL) = 0 [pid 5859] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5859] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5859] getdents64(3, 0x55555fd75730 /* 2 entries */, 32768) = 48 [pid 5859] getdents64(3, 0x55555fd75730 /* 0 entries */, 32768) = 0 [pid 5859] close(3) = 0 [ 286.677622][ T31] INFO: task syz-executor690:5861 blocked for more than 143 seconds. [ 286.685909][ T31] Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 [ 286.696543][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.705260][ T31] task:syz-executor690 state:D stack:23400 pid:5861 tgid:5860 ppid:5859 task_flags:0x440040 flags:0x00004006 [ 286.717529][ T31] Call Trace: [ 286.720873][ T31] [ 286.723826][ T31] __schedule+0x1b88/0x5240 [ 286.733463][ T31] ? schedule+0x163/0x360 [ 286.737973][ T31] ? __pfx___schedule+0x10/0x10 [ 286.742883][ T31] ? schedule+0x90/0x360 [ 286.747246][ T31] ? schedule+0x90/0x360 [ 286.751609][ T31] schedule+0x163/0x360 [ 286.755795][ T31] ? down_read+0x6a5/0xa50 [ 286.760388][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.765867][ T31] down_read+0x6ff/0xa50 [ 286.770189][ T31] ? __pfx_down_read+0x10/0x10 [ 286.775004][ T31] page_cache_ra_order+0x45e/0xca0 [ 286.780338][ T31] filemap_get_pages+0x9ec/0x1fc0 [ 286.785384][ T31] ? kasan_save_track+0x3f/0x80 [ 286.790307][ T31] ? kasan_save_free_info+0x40/0x50 [ 286.795533][ T31] ? __kasan_slab_free+0x59/0x70 [ 286.800604][ T31] ? do_sendfile+0x582/0x8c0 [ 286.805222][ T31] ? do_syscall_64+0xf3/0x210 [ 286.809998][ T31] ? __pfx_filemap_get_pages+0x10/0x10 [ 286.815527][ T31] ? __pfx___might_resched+0x10/0x10 [ 286.820942][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 286.826203][ T31] ? iter_file_splice_write+0x12cb/0x1530 [ 286.831961][ T31] filemap_splice_read+0x690/0xef0 [ 286.837247][ T31] ? __pfx_filemap_splice_read+0x10/0x10 [ 286.842944][ T31] ? __pfx_pipe_lock_cmp_fn+0x10/0x10 [ 286.848389][ T31] ? file_end_write+0xdd/0x250 [ 286.853193][ T31] ? direct_splice_actor+0x128/0x220 [ 286.858619][ T31] ? __pfx_filemap_splice_read+0x10/0x10 [ 286.864280][ T31] splice_direct_to_actor+0x4af/0xc90 [ 286.876202][ T31] ? __pfx_direct_splice_actor+0x10/0x10 [ 286.881890][ T31] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 286.896206][ T31] do_splice_direct+0x281/0x3d0 [ 286.901129][ T31] ? __pfx_do_splice_direct+0x10/0x10 [ 286.916188][ T31] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 286.922133][ T31] ? bpf_lsm_file_permission+0x9/0x10 [ 286.946133][ T31] ? rw_verify_area+0x246/0x630 [ 286.951080][ T31] do_sendfile+0x582/0x8c0 [ 286.955556][ T31] ? __pfx_do_sendfile+0x10/0x10 [ 286.974056][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.979436][ T31] ? ptrace_notify+0x282/0x390 [ 286.984256][ T31] __se_sys_sendfile64+0x17e/0x1e0 [ 287.006137][ T31] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 287.011849][ T31] do_syscall_64+0xf3/0x210 [ 287.016545][ T31] ? clear_bhb_loop+0x45/0xa0 [ 287.021386][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.027346][ T31] RIP: 0033:0x7f8463035369 [ 287.031803][ T31] RSP: 002b:00007f8462fee228 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 287.040472][ T31] RAX: ffffffffffffffda RBX: 00007f84630bf328 RCX: 00007f8463035369 [ 287.048522][ T31] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 [ 287.056605][ T31] RBP: 00007f84630bf320 R08: 00007f8462fee6c0 R09: 00007f8462fee6c0 [ 287.064616][ T31] R10: 000400000000003f R11: 0000000000000246 R12: 00007f84630bf32c [ 287.072809][ T31] R13: 0000200000001000 R14: 6c756e2f7665642f R15: 00007ffd91caffd8 [ 287.081073][ T31] [ 287.084178][ T31] [ 287.084178][ T31] Showing all locks held in the system: [ 287.091975][ T31] 1 lock held by khungtaskd/31: [ 287.096958][ T31] #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 [ 287.107120][ T31] 1 lock held by klogd/5202: [ 287.111737][ T31] 2 locks held by getty/5601: [ 287.144971][ T31] #0: ffff8880346d00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.154930][ T31] #1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 [ 287.165317][ T31] 1 lock held by syz-executor690/5861: [ 287.186264][ T31] #0: ffff88802395b740 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 [ 287.216156][ T31] 3 locks held by syz-executor690/5862: [ 287.221802][ T31] [ 287.224147][ T31] ============================================= [ 287.224147][ T31] [ 287.246534][ T31] NMI backtrace for cpu 0 [ 287.246563][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 PREEMPT(full) [ 287.246587][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 287.246599][ T31] Call Trace: [ 287.246606][ T31] [ 287.246614][ T31] dump_stack_lvl+0x241/0x360 [ 287.246649][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.246677][ T31] ? __pfx__printk+0x10/0x10 [ 287.246714][ T31] nmi_cpu_backtrace+0x4ab/0x4e0 [ 287.246749][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.246774][ T31] ? _printk+0xd5/0x120 [ 287.246801][ T31] ? __wake_up_klogd+0xcc/0x110 [ 287.246823][ T31] ? __pfx__printk+0x10/0x10 [ 287.246853][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.246873][ T31] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.246904][ T31] watchdog+0x1058/0x10a0 [ 287.246931][ T31] ? watchdog+0x1ea/0x10a0 [ 287.246959][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.246983][ T31] kthread+0x7b7/0x940 [ 287.247008][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.247035][ T31] ? __pfx_kthread+0x10/0x10 [ 287.247054][ T31] ? __pfx_kthread+0x10/0x10 [ 287.247076][ T31] ? __pfx_kthread+0x10/0x10 [ 287.247097][ T31] ? __pfx_kthread+0x10/0x10 [ 287.247118][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.247144][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 287.247163][ T31] ? __pfx_kthread+0x10/0x10 [ 287.247185][ T31] ret_from_fork+0x4b/0x80 [ 287.247203][ T31] ? __pfx_kthread+0x10/0x10 [ 287.247225][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.247266][ T31] [ 287.247274][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.414125][ C1] NMI backtrace for cpu 1 [ 287.414144][ C1] CPU: 1 UID: 0 PID: 5862 Comm: syz-executor690 Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 PREEMPT(full) [ 287.414164][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 287.414174][ C1] RIP: 0010:lock_acquire+0xae/0x2f0 [ 287.414201][ C1] Code: e8 97 67 8e 00 83 3d f0 ae c1 0e 00 0f 84 ef 00 00 00 65 8b 05 c3 35 ca 11 85 c0 0f 85 e0 00 00 00 65 48 8b 04 25 08 60 68 93 <83> b8 ec 0a 00 00 00 0f 85 ca 00 00 00 48 c7 44 24 10 00 00 00 00 [ 287.414215][ C1] RSP: 0018:ffffc9000408ee68 EFLAGS: 00000246 [ 287.414232][ C1] RAX: ffff8880782ada00 RBX: ffffffff8ed3df20 RCX: 0000000000000002 [ 287.414243][ C1] RDX: 0000000000000000 RSI: ffffffff816d9be5 RDI: 1ffffffff1da7be4 [ 287.414255][ C1] RBP: ffffffff93686020 R08: 0000000000000000 R09: 0000000000000000 [ 287.414265][ C1] R10: ffffc9000408f020 R11: fffff52000811e10 R12: 0000000000000000 [ 287.414276][ C1] R13: 0000000000000002 R14: ffffffff816dc508 R15: 0000000000000000 [ 287.414287][ C1] FS: 00007f8462fcd6c0(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000 [ 287.414300][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.414311][ C1] CR2: 00005606e6d75600 CR3: 000000002f6f0000 CR4: 00000000003526f0 [ 287.414326][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.414335][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.414345][ C1] Call Trace: [ 287.414351][ C1] [ 287.414361][ C1] ? __unwind_start+0xf8/0x740 [ 287.414380][ C1] ? unwind_next_frame+0xb8/0x23b0 [ 287.414398][ C1] unwind_next_frame+0xd5/0x23b0 [ 287.414416][ C1] ? unwind_next_frame+0xb8/0x23b0 [ 287.414438][ C1] ? get_stack_info_noinstr+0x1a/0x130 [ 287.414459][ C1] ? __unwind_start+0xf8/0x740 [ 287.414480][ C1] __unwind_start+0x59a/0x740 [ 287.414500][ C1] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 287.414520][ C1] arch_stack_walk+0xe7/0x150 [ 287.414542][ C1] ? __unwind_start+0xf8/0x740 [ 287.414563][ C1] stack_trace_save+0x11a/0x1d0 [ 287.414582][ C1] ? __pfx_stack_trace_save+0x10/0x10 [ 287.414601][ C1] ? stack_depot_save_flags+0x44/0x940 [ 287.414631][ C1] kasan_save_track+0x3f/0x80 [ 287.414682][ C1] __kasan_slab_alloc+0x66/0x80 [ 287.414706][ C1] kmem_cache_alloc_noprof+0x1e1/0x390 [ 287.414722][ C1] ? mempool_alloc_noprof+0x199/0x5a0 [ 287.414742][ C1] ? __pfx_mempool_alloc_slab+0x10/0x10 [ 287.414761][ C1] mempool_alloc_noprof+0x199/0x5a0 [ 287.414779][ C1] ? bvec_phys+0x11c/0x4f0 [ 287.414804][ C1] ? __pfx_mempool_alloc_noprof+0x10/0x10 [ 287.414822][ C1] ? bio_split_rw_at+0xd2a/0xed0 [ 287.414849][ C1] bio_alloc_bioset+0x26f/0x1130 [ 287.414878][ C1] bio_split+0x107/0x490 [ 287.414896][ C1] bio_submit_split+0x98/0x600 [ 287.414917][ C1] blk_mq_submit_bio+0x18a6/0x25e0 [ 287.414934][ C1] ? kasan_save_track+0x3f/0x80 [ 287.414954][ C1] ? __kasan_slab_alloc+0x66/0x80 [ 287.415000][ C1] ? kmem_cache_alloc_noprof+0x1e1/0x390 [ 287.415018][ C1] ? blk_mq_submit_bio+0x496/0x25e0 [ 287.415037][ C1] ? __pfx_blk_mq_submit_bio+0x10/0x10 [ 287.415065][ C1] __submit_bio+0x1d2/0x6d0 [ 287.415083][ C1] ? __lock_acquire+0xad5/0xd80 [ 287.415105][ C1] ? __pfx___submit_bio+0x10/0x10 [ 287.415134][ C1] submit_bio_noacct_nocheck+0x57b/0xe30 [ 287.415151][ C1] ? pfn_valid+0x40e/0x450 [ 287.415167][ C1] ? __pfx___might_resched+0x10/0x10 [ 287.415182][ C1] ? blkg_get+0x1e/0x1d0 [ 287.415197][ C1] ? __pfx_submit_bio_noacct_nocheck+0x10/0x10 [ 287.415221][ C1] ? submit_bio_noacct+0xda1/0x1b00 [ 287.415246][ C1] bio_chain_and_submit+0xed/0x130 [ 287.415271][ C1] __blkdev_issue_zero_pages+0x218/0x290 [ 287.415296][ C1] blkdev_issue_zeroout+0x651/0x880 [ 287.415321][ C1] ? __pfx_blkdev_issue_zeroout+0x10/0x10 [ 287.415352][ C1] ? down_write+0x18d/0x220 [ 287.415370][ C1] ? __pfx_down_write+0x10/0x10 [ 287.415392][ C1] ? truncate_bdev_range+0xcb/0x100 [ 287.415411][ C1] blkdev_fallocate+0x3dd/0x490 [ 287.415436][ C1] ? __pfx_blkdev_fallocate+0x10/0x10 [ 287.415458][ C1] vfs_fallocate+0x627/0x7a0 [ 287.415485][ C1] ? __pfx_vfs_fallocate+0x10/0x10 [ 287.415513][ C1] __x64_sys_fallocate+0xbc/0x110 [ 287.415539][ C1] do_syscall_64+0xf3/0x210 [ 287.415555][ C1] ? clear_bhb_loop+0x45/0xa0 [ 287.415573][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.415589][ C1] RIP: 0033:0x7f8463035369 [ 287.415603][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 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 b0 ff ff ff f7 d8 64 89 01 48 [ 287.415616][ C1] RSP: 002b:00007f8462fcd228 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 287.415632][ C1] RAX: ffffffffffffffda RBX: 00007f84630bf338 RCX: 00007f8463035369 [ 287.415643][ C1] RDX: 0000000008000000 RSI: 0000000000000011 RDI: 0000000000000004 [ 287.415653][ C1] RBP: 00007f84630bf330 R08: 00007f8462fcd6c0 R09: 00007f8462fcd6c0 [ 287.415665][ C1] R10: 0008004000000200 R11: 0000000000000246 R12: 00007f84630bf33c [ 287.415675][ C1] R13: 0000200000001000 R14: 6c756e2f7665642f R15: 00007ffd91caffd8 [ 287.415695][ C1] [ 287.415703][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.578 msecs [ 287.419207][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.419235][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 PREEMPT(full) [ 287.419263][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 287.419279][ T31] Call Trace: [ 287.419288][ T31] [ 287.419299][ T31] dump_stack_lvl+0x241/0x360 [ 287.419338][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.419372][ T31] ? __pfx__printk+0x10/0x10 [ 287.419410][ T31] ? vscnprintf+0x5d/0x90 [ 287.419443][ T31] panic+0x349/0x880 [ 287.419471][ T31] ? __pfx_preempt_schedule+0x10/0x10 [ 287.419494][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.419528][ T31] ? __pfx_panic+0x10/0x10 [ 287.419553][ T31] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.419583][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.419610][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.419641][ T31] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.419676][ T31] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.419712][ T31] watchdog+0x1097/0x10a0 [ 287.419742][ T31] ? watchdog+0x1ea/0x10a0 [ 287.419776][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.419806][ T31] kthread+0x7b7/0x940 [ 287.419834][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.419864][ T31] ? __pfx_kthread+0x10/0x10 [ 287.419888][ T31] ? __pfx_kthread+0x10/0x10 [ 287.419913][ T31] ? __pfx_kthread+0x10/0x10 [ 287.419938][ T31] ? __pfx_kthread+0x10/0x10 [ 287.419975][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.420006][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 287.420027][ T31] ? __pfx_kthread+0x10/0x10 [ 287.420053][ T31] ret_from_fork+0x4b/0x80 [ 287.420074][ T31] ? __pfx_kthread+0x10/0x10 [ 287.420099][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.420136][ T31] [ 288.096241][ T31] Kernel Offset: disabled [ 288.100571][ T31] Rebooting in 86400 seconds..