./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2973692253 <...> Warning: Permanently added '10.128.1.195' (ED25519) to the list of known hosts. execve("./syz-executor2973692253", ["./syz-executor2973692253"], 0x7fff39941030 /* 10 vars */) = 0 brk(NULL) = 0x55557870c000 brk(0x55557870cd00) = 0x55557870cd00 arch_prctl(ARCH_SET_FS, 0x55557870c380) = 0 set_tid_address(0x55557870c650) = 5887 set_robust_list(0x55557870c660, 24) = 0 rseq(0x55557870cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2973692253", 4096) = 28 getrandom("\x9c\x4b\xfd\xd4\x70\x8d\xa7\xd2", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557870cd00 brk(0x55557872dd00) = 0x55557872dd00 brk(0x55557872e000) = 0x55557872e000 mprotect(0x7fd97aa45000, 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 5888 attached , child_tidptr=0x55557870c650) = 5888 [pid 5888] set_robust_list(0x55557870c660, 24) = 0 [pid 5888] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5888] setpgid(0, 0) = 0 [pid 5888] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5888] write(3, "1000", 4) = 4 [pid 5888] close(3) = 0 executing program [pid 5888] write(1, "executing program\n", 18) = 18 [pid 5888] sync() = 0 [pid 5888] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 [pid 5888] sendto(3, [{nlmsg_len=28, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x03\x00\x00\x00\x08\x00\x02\x00\x6e\x62\x64\x00"], 28, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 28 [pid 5888] recvfrom(3, [{nlmsg_len=180, nlmsg_type=nlctrl, nlmsg_flags=0, nlmsg_seq=0, nlmsg_pid=5888}, "\x01\x02\x00\x00\x08\x00\x02\x00\x6e\x62\x64\x00\x06\x00\x01\x00\x29\x00\x00\x00\x08\x00\x03\x00\x01\x00\x00\x00\x08\x00\x04\x00\x00\x00\x00\x00\x08\x00\x05\x00\x0a\x00\x00\x00\x54\x00\x06\x00\x14\x00\x01\x00\x08\x00\x01\x00\x01\x00\x00\x00\x08\x00\x02\x00\x0a\x00\x00\x00\x14\x00\x02\x00\x08\x00\x01\x00\x02\x00\x00\x00\x08\x00\x02\x00\x0a\x00\x00\x00\x14\x00\x03\x00\x08\x00\x01\x00\x03\x00\x00\x00"...], 4096, 0, NULL, NULL) = 180 [pid 5888] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5888}, {error=0, msg={nlmsg_len=28, nlmsg_type=nlctrl, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 [pid 5888] socketpair(AF_UNIX, SOCK_STREAM, 0, [4, 5]) = 0 [pid 5888] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x3c\x00\x00\x00\x29\x00\x01\x00\x25\xbd\x70\x00\x02\xdc\xdf\x25\x01\x00\x00\x00\x10\x00\x07\x80\x0c\x00\x01\x80\x08\x00\x01\x00\x04\x00\x00\x00\x0c\x00\x02\x00\x01\x00\x00\x00\x01\x00\x01\x00\x0c\x00\x05\x00\x26\x00\x00\x00\x00\x00\x00\x00", iov_len=60}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_OOB|MSG_BATCH|MSG_ZEROCOPY|MSG_FASTOPEN}, 0) = 60 [pid 5888] exit_group(0) = ? [pid 5888] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5888, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5890 attached , child_tidptr=0x55557870c650) = 5890 [pid 5890] set_robust_list(0x55557870c660, 24) = 0 [pid 5890] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5890] setpgid(0, 0) = 0 [pid 5890] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5890] write(3, "1000", 4) = 4 [ 140.202857][ T5888] nbd0: detected capacity change from 0 to 549764202496 [ 140.216676][ T51] block nbd0: Receive control failed (result -104) [pid 5890] close(3) = 0 executing program [pid 5890] write(1, "executing program\n", 18) = 18 [pid 5890] sync( [pid 5887] kill(-5890, SIGKILL) = 0 [pid 5887] kill(5890, SIGKILL) = 0 [pid 5887] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5887] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5887] getdents64(3, 0x55557870d6f0 /* 2 entries */, 32768) = 48 [pid 5887] getdents64(3, 0x55557870d6f0 /* 0 entries */, 32768) = 0 [pid 5887] close(3) = 0 [ 170.552862][ T11] block nbd0: Possible stuck request ffff888025585080: control (read@0,4096B). Runtime 30 seconds [ 200.279201][ T5235] udevd[5235]: worker [5889] /devices/virtual/block/nbd0 is taking a long time [ 200.632943][ T25] block nbd0: Possible stuck request ffff888025585080: control (read@0,4096B). Runtime 60 seconds [ 230.712936][ T25] block nbd0: Possible stuck request ffff888025585080: control (read@0,4096B). Runtime 90 seconds [ 260.822703][ T25] block nbd0: Possible stuck request ffff888025585080: control (read@0,4096B). Runtime 120 seconds [ 286.394800][ T31] INFO: task syz-executor297:5890 blocked for more than 143 seconds. [ 286.402971][ T31] Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 [ 286.410074][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.418916][ T31] task:syz-executor297 state:D stack:28168 pid:5890 tgid:5890 ppid:5887 task_flags:0x400040 flags:0x00004006 [ 286.430897][ T31] Call Trace: [ 286.434225][ T31] [ 286.437155][ T31] __schedule+0x1798/0x4cc0 [ 286.441678][ T31] ? blk_status_to_errno+0x22/0x80 [ 286.446884][ T31] ? __pfx___schedule+0x10/0x10 [ 286.451827][ T31] ? schedule+0x91/0x360 [ 286.456103][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.460869][ T31] ? lock_release+0x4b/0x3e0 [ 286.465494][ T31] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 286.471389][ T31] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 286.477826][ T31] schedule+0x165/0x360 [ 286.481977][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.487466][ T31] __mutex_lock+0x7e6/0x1360 [ 286.492079][ T31] ? __mutex_lock+0x5b6/0x1360 [ 286.496883][ T31] ? sync_bdevs+0x1ac/0x340 [ 286.501410][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.506483][ T31] ? iput+0x398/0x9d0 [ 286.510487][ T31] ? do_raw_spin_unlock+0x122/0x240 [ 286.515877][ T31] sync_bdevs+0x1ac/0x340 [ 286.520225][ T31] ksys_sync+0xb9/0x150 [ 286.524550][ T31] ? __pfx_ksys_sync+0x10/0x10 [ 286.529317][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.534106][ T31] __ia32_sys_sync+0xe/0x20 [ 286.538610][ T31] do_syscall_64+0xfa/0x3b0 [ 286.543138][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.549222][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.553940][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.559826][ T31] RIP: 0033:0x7fd97a9d2959 [ 286.564276][ T31] RSP: 002b:00007ffd0221b4d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 [ 286.572722][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd97a9d2959 [ 286.580700][ T31] RDX: 00007fd97a9d1b90 RSI: 0000000000000012 RDI: 00007fd97aa1b03b [ 286.588734][ T31] RBP: 000000000002219f R08: 0000000000000000 R09: 0000000000000006 [ 286.596723][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd0221b4ec [ 286.604740][ T31] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 286.612743][ T31] [ 286.615765][ T31] INFO: lockdep is turned off. [ 286.620541][ T31] NMI backtrace for cpu 1 [ 286.620559][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full) [ 286.620575][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 286.620584][ T31] Call Trace: [ 286.620590][ T31] [ 286.620595][ T31] dump_stack_lvl+0x189/0x250 [ 286.620620][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.620638][ T31] ? __pfx__printk+0x10/0x10 [ 286.620667][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.620687][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.620704][ T31] ? __pfx__printk+0x10/0x10 [ 286.620725][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.620744][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.620766][ T31] watchdog+0xf60/0xfa0 [ 286.620785][ T31] ? watchdog+0x1e2/0xfa0 [ 286.620802][ T31] kthread+0x711/0x8a0 [ 286.620819][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.620833][ T31] ? __pfx_kthread+0x10/0x10 [ 286.620855][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.620876][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.620889][ T31] ? __pfx_kthread+0x10/0x10 [ 286.620908][ T31] ret_from_fork+0x3f9/0x770 [ 286.620925][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.620943][ T31] ? __switch_to_asm+0x39/0x70 [ 286.620954][ T31] ? __switch_to_asm+0x33/0x70 [ 286.620965][ T31] ? __pfx_kthread+0x10/0x10 [ 286.620984][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.621001][ T31] [ 286.621006][ T31] Sending NMI from CPU 1 to CPUs 0: [ 286.768077][ C0] NMI backtrace for cpu 0 [ 286.768093][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full) [ 286.768109][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 286.768118][ C0] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 286.768138][ C0] Code: 53 e8 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 1a 25 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 286.768149][ C0] RSP: 0018:ffffffff8e207d80 EFLAGS: 000002c6 [ 286.768162][ C0] RAX: 302944256c608e00 RBX: ffffffff8196d368 RCX: 302944256c608e00 [ 286.768173][ C0] RDX: 0000000000000001 RSI: ffffffff8c04d960 RDI: ffffffff8196d368 [ 286.768183][ C0] RBP: ffffffff8e207eb8 R08: ffff8880b8632f9b R09: 1ffff110170c65f3 [ 286.768194][ C0] R10: dffffc0000000000 R11: ffffed10170c65f4 R12: ffffffff8fe4db30 [ 286.768204][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1c52a40 [ 286.768213][ C0] FS: 0000000000000000(0000) GS:ffff8881257d6000(0000) knlGS:0000000000000000 [ 286.768225][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.768234][ C0] CR2: 00005595b06bc168 CR3: 000000000e336000 CR4: 00000000003526f0 [ 286.768247][ C0] Call Trace: [ 286.768255][ C0] [ 286.768261][ C0] default_idle+0x13/0x20 [ 286.768277][ C0] default_idle_call+0x74/0xb0 [ 286.768293][ C0] do_idle+0x1e8/0x510 [ 286.768311][ C0] ? __pfx_do_idle+0x10/0x10 [ 286.768331][ C0] cpu_startup_entry+0x44/0x60 [ 286.768346][ C0] rest_init+0x2de/0x300 [ 286.768362][ C0] start_kernel+0x3a9/0x410 [ 286.768382][ C0] x86_64_start_reservations+0x24/0x30 [ 286.768397][ C0] x86_64_start_kernel+0x143/0x1c0 [ 286.768410][ C0] common_startup_64+0x13e/0x147 [ 286.768429][ C0] [ 286.769071][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 286.951366][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full) [ 286.962728][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 286.972867][ T31] Call Trace: [ 286.976133][ T31] [ 286.979048][ T31] dump_stack_lvl+0x99/0x250 [ 286.983633][ T31] ? __asan_memcpy+0x40/0x70 [ 286.988212][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.993396][ T31] ? __pfx__printk+0x10/0x10 [ 286.997984][ T31] vpanic+0x281/0x750 [ 287.001951][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.006437][ T31] ? rcu_is_watching+0x15/0xb0 [ 287.011184][ T31] ? preempt_schedule+0xae/0xc0 [ 287.016015][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.021551][ T31] panic+0xb9/0xc0 [ 287.025263][ T31] ? __pfx_panic+0x10/0x10 [ 287.029665][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.035021][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.041160][ T31] watchdog+0xf9f/0xfa0 [ 287.045300][ T31] ? watchdog+0x1e2/0xfa0 [ 287.049617][ T31] kthread+0x711/0x8a0 [ 287.053669][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.058331][ T31] ? __pfx_kthread+0x10/0x10 [ 287.062910][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.068193][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.073373][ T31] ? __pfx_kthread+0x10/0x10 [ 287.077952][ T31] ret_from_fork+0x3f9/0x770 [ 287.082532][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.087632][ T31] ? __switch_to_asm+0x39/0x70 [ 287.092380][ T31] ? __switch_to_asm+0x33/0x70 [ 287.097147][ T31] ? __pfx_kthread+0x10/0x10 [ 287.101746][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.106515][ T31] [ 287.110205][ T31] Kernel Offset: disabled [ 287.114512][ T31] Rebooting in 86400 seconds..