./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4041392836 <...> Warning: Permanently added '10.128.1.41' (ED25519) to the list of known hosts. execve("./syz-executor4041392836", ["./syz-executor4041392836"], 0x7ffd4b5e06e0 /* 10 vars */) = 0 brk(NULL) = 0x555557941000 brk(0x555557941d00) = 0x555557941d00 arch_prctl(ARCH_SET_FS, 0x555557941380) = 0 set_tid_address(0x555557941650) = 5870 set_robust_list(0x555557941660, 24) = 0 rseq(0x555557941ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4041392836", 4096) = 28 getrandom("\x7f\x1e\xa5\x5e\x57\x82\xb1\x1f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557941d00 brk(0x555557962d00) = 0x555557962d00 brk(0x555557963000) = 0x555557963000 mprotect(0x7f0e4bda8000, 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 5871 attached [pid 5871] set_robust_list(0x555557941660, 24 [pid 5870] <... clone resumed>, child_tidptr=0x555557941650) = 5871 [pid 5871] <... set_robust_list resumed>) = 0 [pid 5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5871] setpgid(0, 0) = 0 [pid 5871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5871] write(3, "1000", 4) = 4 [pid 5871] close(3executing program ) = 0 [pid 5871] write(1, "executing program\n", 18) = 18 [pid 5871] socket(AF_VSOCK, SOCK_SEQPACKET, 0) = 3 [pid 5871] bind(3, {sa_family=AF_VSOCK, svm_cid=VMADDR_CID_ANY, svm_port=0, svm_flags=0}, 16) = 0 [pid 5871] listen(3, 0) = 0 [pid 5871] socket(AF_VSOCK, SOCK_SEQPACKET, 0) = 4 [pid 5871] connect(4, {sa_family=AF_VSOCK, svm_cid=VMADDR_CID_ANY, svm_port=0, svm_flags=0}, 16) = 0 [pid 5871] mmap(0x200000000000, 16506880, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 [pid 5871] openat(AT_FDCWD, 0x200000000000, O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 5871] ioctl(5, TUNSETIFF, 0x2000000000c0) = 0 [pid 5871] write(5, 0x200000000440, 65007) = -1 EIO (Input/output error) [pid 5871] setsockopt(4, SOL_SOCKET, SO_ZEROCOPY, 0x200000000180, 8) = 0 [ 80.968057][ T5871] ------------[ cut here ]------------ [ 80.973584][ T5871] 'send_pkt()' returns 0, but 65536 expected [ 80.980335][ T5871] WARNING: net/vmw_vsock/virtio_transport_common.c:428 at virtio_transport_send_pkt_info+0xd11/0xf00, CPU#0: syz-executor404/5871 [ 80.994219][ T5871] Modules linked in: [ 80.998167][ T5871] CPU: 0 UID: 0 PID: 5871 Comm: syz-executor404 Not tainted 6.16.0-next-20250808-syzkaller #0 PREEMPT(full) [ 81.009907][ T5871] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 81.019994][ T5871] RIP: 0010:virtio_transport_send_pkt_info+0xd11/0xf00 [ 81.026893][ T5871] Code: 0f 0b 90 bd f2 ff ff ff eb bc e8 0a bb 5d f6 c6 05 c7 7a 6c 04 01 90 48 c7 c7 c0 67 da 8c 44 89 f6 4c 89 ea e8 60 51 21 f6 90 <0f> 0b 90 90 e9 e1 fe ff ff e8 e1 ba 5d f6 90 0f 0b 90 e9 c5 f7 ff [ 81.046536][ T5871] RSP: 0018:ffffc90004017530 EFLAGS: 00010246 [ 81.052613][ T5871] RAX: 43d4fca88bdf8c00 RBX: 0000000000010000 RCX: ffff8880246f0000 [ 81.060608][ T5871] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 [ 81.068604][ T5871] RBP: ffffffff8fc8be10 R08: 0000000000000003 R09: 0000000000000004 [ 81.076590][ T5871] R10: dffffc0000000000 R11: fffffbfff1c7a1ec R12: dffffc0000000000 [ 81.084584][ T5871] R13: 0000000000010000 R14: 0000000000000000 R15: ffff88802944eda4 [ 81.092625][ T5871] FS: 0000555557941380(0000) GS:ffff8881257db000(0000) knlGS:0000000000000000 [ 81.101955][ T5871] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.108567][ T5871] CR2: 000020000003f000 CR3: 00000000767aa000 CR4: 00000000003526f0 [ 81.116573][ T5871] Call Trace: [ 81.119848][ T5871] [ 81.122786][ T5871] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.128068][ T5871] virtio_transport_seqpacket_enqueue+0x143/0x1c0 [ 81.134523][ T5871] ? __pfx_virtio_transport_seqpacket_enqueue+0x10/0x10 [ 81.141549][ T5871] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 81.147910][ T5871] ? do_raw_spin_unlock+0x122/0x240 [ 81.153132][ T5871] ? remove_wait_queue+0x33/0x120 [ 81.158213][ T5871] vsock_connectible_sendmsg+0xac7/0x1050 [ 81.163964][ T5871] ? __pfx_vsock_connectible_sendmsg+0x10/0x10 [ 81.170347][ T5871] ? __pfx_aa_sk_perm+0x10/0x10 [ 81.175257][ T5871] ? __pfx_woken_wake_function+0x10/0x10 [ 81.180898][ T5871] ? aa_sock_msg_perm+0xf1/0x1d0 [ 81.185906][ T5871] ? bpf_lsm_socket_sendmsg+0x9/0x20 [ 81.191203][ T5871] ? __pfx_vsock_connectible_sendmsg+0x10/0x10 [ 81.197383][ T5871] __sock_sendmsg+0x21c/0x270 [ 81.202081][ T5871] ____sys_sendmsg+0x52d/0x830 [ 81.206880][ T5871] ? __pfx_____sys_sendmsg+0x10/0x10 [ 81.212174][ T5871] ? import_iovec+0x74/0xa0 [ 81.216694][ T5871] ___sys_sendmsg+0x21f/0x2a0 [ 81.221379][ T5871] ? __pfx____sys_sendmsg+0x10/0x10 [ 81.226653][ T5871] ? trace_sched_exit_tp+0x36/0x110 [ 81.231855][ T5871] ? __schedule+0x17ae/0x4cc0 [ 81.236581][ T5871] ? __lock_acquire+0xab9/0xd20 [ 81.241442][ T5871] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 81.246886][ T5871] __sys_sendmmsg+0x227/0x430 [ 81.251576][ T5871] ? __pfx___sys_sendmmsg+0x10/0x10 [ 81.256796][ T5871] ? _raw_spin_unlock_irq+0x23/0x50 [ 81.262001][ T5871] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.267259][ T5871] ? rcu_is_watching+0x15/0xb0 [ 81.272050][ T5871] __x64_sys_sendmmsg+0xa0/0xc0 [ 81.276953][ T5871] do_syscall_64+0xfa/0x3b0 [ 81.281460][ T5871] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.286689][ T5871] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.292780][ T5871] ? clear_bhb_loop+0x60/0xb0 [ 81.297503][ T5871] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.303399][ T5871] RIP: 0033:0x7f0e4bd34df9 [ 81.307871][ T5871] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 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 [ 81.327515][ T5871] RSP: 002b:00007ffdc5207378 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 81.335958][ T5871] RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007f0e4bd34df9 [ 81.343934][ T5871] RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000004 [ 81.351954][ T5871] RBP: 00007f0e4bda85f0 R08: 0000000000000000 R09: 0000000000000006 [ 81.359948][ T5871] R10: 0000000024008094 R11: 0000000000000246 R12: 0000000000000000 [ 81.367955][ T5871] R13: 00007f0e4bda85f0 R14: 0000000000000001 R15: 0000000000000001 [ 81.375953][ T5871] [ 81.378959][ T5871] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 81.386224][ T5871] CPU: 0 UID: 0 PID: 5871 Comm: syz-executor404 Not tainted 6.16.0-next-20250808-syzkaller #0 PREEMPT(full) [ 81.397760][ T5871] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 81.407817][ T5871] Call Trace: [ 81.411092][ T5871] [ 81.414019][ T5871] dump_stack_lvl+0x99/0x250 [ 81.418616][ T5871] ? __asan_memcpy+0x40/0x70 [ 81.423214][ T5871] ? __pfx_dump_stack_lvl+0x10/0x10 [ 81.428411][ T5871] ? __pfx__printk+0x10/0x10 [ 81.433009][ T5871] vpanic+0x281/0x750 [ 81.436993][ T5871] ? __pfx__printk+0x10/0x10 [ 81.441578][ T5871] ? __pfx_vpanic+0x10/0x10 [ 81.446079][ T5871] ? is_bpf_text_address+0x292/0x2b0 [ 81.451361][ T5871] ? is_bpf_text_address+0x26/0x2b0 [ 81.456559][ T5871] panic+0xb9/0xc0 [ 81.460275][ T5871] ? __pfx_panic+0x10/0x10 [ 81.464698][ T5871] __warn+0x334/0x4c0 [ 81.468672][ T5871] ? virtio_transport_send_pkt_info+0xd11/0xf00 [ 81.474947][ T5871] ? virtio_transport_send_pkt_info+0xd11/0xf00 [ 81.481185][ T5871] report_bug+0x2be/0x4f0 [ 81.485513][ T5871] ? virtio_transport_send_pkt_info+0xd11/0xf00 [ 81.491764][ T5871] ? virtio_transport_send_pkt_info+0xd11/0xf00 [ 81.498005][ T5871] ? virtio_transport_send_pkt_info+0xd13/0xf00 [ 81.504241][ T5871] handle_bug+0x84/0x160 [ 81.508489][ T5871] exc_invalid_op+0x1a/0x50 [ 81.512999][ T5871] asm_exc_invalid_op+0x1a/0x20 [ 81.517848][ T5871] RIP: 0010:virtio_transport_send_pkt_info+0xd11/0xf00 [ 81.524701][ T5871] Code: 0f 0b 90 bd f2 ff ff ff eb bc e8 0a bb 5d f6 c6 05 c7 7a 6c 04 01 90 48 c7 c7 c0 67 da 8c 44 89 f6 4c 89 ea e8 60 51 21 f6 90 <0f> 0b 90 90 e9 e1 fe ff ff e8 e1 ba 5d f6 90 0f 0b 90 e9 c5 f7 ff [ 81.544316][ T5871] RSP: 0018:ffffc90004017530 EFLAGS: 00010246 [ 81.550383][ T5871] RAX: 43d4fca88bdf8c00 RBX: 0000000000010000 RCX: ffff8880246f0000 [ 81.558344][ T5871] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 [ 81.566303][ T5871] RBP: ffffffff8fc8be10 R08: 0000000000000003 R09: 0000000000000004 [ 81.574286][ T5871] R10: dffffc0000000000 R11: fffffbfff1c7a1ec R12: dffffc0000000000 [ 81.582258][ T5871] R13: 0000000000010000 R14: 0000000000000000 R15: ffff88802944eda4 [ 81.590246][ T5871] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.595463][ T5871] virtio_transport_seqpacket_enqueue+0x143/0x1c0 [ 81.601875][ T5871] ? __pfx_virtio_transport_seqpacket_enqueue+0x10/0x10 [ 81.608811][ T5871] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 81.615139][ T5871] ? do_raw_spin_unlock+0x122/0x240 [ 81.620357][ T5871] ? remove_wait_queue+0x33/0x120 [ 81.625398][ T5871] vsock_connectible_sendmsg+0xac7/0x1050 [ 81.631147][ T5871] ? __pfx_vsock_connectible_sendmsg+0x10/0x10 [ 81.637306][ T5871] ? __pfx_aa_sk_perm+0x10/0x10 [ 81.642165][ T5871] ? __pfx_woken_wake_function+0x10/0x10 [ 81.647819][ T5871] ? aa_sock_msg_perm+0xf1/0x1d0 [ 81.652760][ T5871] ? bpf_lsm_socket_sendmsg+0x9/0x20 [ 81.658050][ T5871] ? __pfx_vsock_connectible_sendmsg+0x10/0x10 [ 81.664213][ T5871] __sock_sendmsg+0x21c/0x270 [ 81.668894][ T5871] ____sys_sendmsg+0x52d/0x830 [ 81.673656][ T5871] ? __pfx_____sys_sendmsg+0x10/0x10 [ 81.678948][ T5871] ? import_iovec+0x74/0xa0 [ 81.683451][ T5871] ___sys_sendmsg+0x21f/0x2a0 [ 81.688124][ T5871] ? __pfx____sys_sendmsg+0x10/0x10 [ 81.693319][ T5871] ? trace_sched_exit_tp+0x36/0x110 [ 81.698509][ T5871] ? __schedule+0x17ae/0x4cc0 [ 81.703199][ T5871] ? __lock_acquire+0xab9/0xd20 [ 81.708053][ T5871] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 81.713433][ T5871] __sys_sendmmsg+0x227/0x430 [ 81.718124][ T5871] ? __pfx___sys_sendmmsg+0x10/0x10 [ 81.723338][ T5871] ? _raw_spin_unlock_irq+0x23/0x50 [ 81.728539][ T5871] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.733756][ T5871] ? rcu_is_watching+0x15/0xb0 [ 81.738525][ T5871] __x64_sys_sendmmsg+0xa0/0xc0 [ 81.743374][ T5871] do_syscall_64+0xfa/0x3b0 [ 81.747868][ T5871] ? lockdep_hardirqs_on+0x9c/0x150 [ 81.753062][ T5871] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.759119][ T5871] ? clear_bhb_loop+0x60/0xb0 [ 81.763791][ T5871] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.769674][ T5871] RIP: 0033:0x7f0e4bd34df9 [ 81.774079][ T5871] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 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 [ 81.793672][ T5871] RSP: 002b:00007ffdc5207378 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 81.802078][ T5871] RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007f0e4bd34df9 [ 81.810042][ T5871] RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000004 [ 81.818001][ T5871] RBP: 00007f0e4bda85f0 R08: 0000000000000000 R09: 0000000000000006 [ 81.825962][ T5871] R10: 0000000024008094 R11: 0000000000000246 R12: 0000000000000000 [ 81.833920][ T5871] R13: 00007f0e4bda85f0 R14: 0000000000000001 R15: 0000000000000001 [ 81.841893][ T5871] [ 81.845148][ T5871] Kernel Offset: disabled [ 81.849458][ T5871] Rebooting in 86400 seconds..