./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor493981873 <...> Warning: Permanently added '10.128.10.2' (ED25519) to the list of known hosts. execve("./syz-executor493981873", ["./syz-executor493981873"], 0x7ffd251ea1a0 /* 10 vars */) = 0 brk(NULL) = 0x555555600000 brk(0x555555600d00) = 0x555555600d00 arch_prctl(ARCH_SET_FS, 0x555555600380) = 0 set_tid_address(0x555555600650) = 5050 set_robust_list(0x555555600660, 24) = 0 rseq(0x555555600ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor493981873", 4096) = 27 getrandom("\xb0\xe5\x79\x69\xde\x15\xdf\x79", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555600d00 brk(0x555555621d00) = 0x555555621d00 brk(0x555555622000) = 0x555555622000 mprotect(0x7fa74c585000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555600650) = 5051 ./strace-static-x86_64: Process 5051 attached [pid 5051] set_robust_list(0x555555600660, 24) = 0 [pid 5051] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5051] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5051] setsid() = 1 [pid 5051] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5051] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5051] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5051] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5051] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5051] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5051] unshare(CLONE_NEWNS) = 0 [pid 5051] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5051] unshare(CLONE_NEWIPC) = 0 [pid 5051] unshare(CLONE_NEWCGROUP) = 0 [pid 5051] unshare(CLONE_NEWUTS) = 0 [pid 5051] unshare(CLONE_SYSVSEM) = 0 [pid 5051] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "16777216", 8) = 8 [pid 5051] close(3) = 0 [pid 5051] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "536870912", 9) = 9 [pid 5051] close(3) = 0 [pid 5051] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "1024", 4) = 4 [pid 5051] close(3) = 0 [pid 5051] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "8192", 4) = 4 [pid 5051] close(3) = 0 [pid 5051] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "1024", 4) = 4 [pid 5051] close(3) = 0 [pid 5051] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "1024", 4) = 4 [pid 5051] close(3) = 0 [pid 5051] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5051] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5051] close(3) = 0 [pid 5051] getpid() = 1 [pid 5051] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< skb_headlen() (1305) [ 68.380775][ T5051] WARNING: CPU: 1 PID: 5051 at net/core/dev.c:3302 skb_checksum_help+0x6b1/0x740 [ 68.389936][ T5051] Modules linked in: [ 68.393832][ T5051] CPU: 1 PID: 5051 Comm: syz-executor493 Not tainted 6.6.0-syzkaller-05843-g89ed67ef126c #0 [ 68.403919][ T5051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 68.414002][ T5051] RIP: 0010:skb_checksum_help+0x6b1/0x740 [ 68.419762][ T5051] Code: ff df 48 8b 4c 24 18 0f b6 04 01 84 c0 0f 85 83 00 00 00 48 8b 04 24 2b 18 48 c7 c7 e0 4f 3b 8c 4c 89 fe 89 da e8 8f 60 60 f8 <0f> 0b bb ea ff ff ff e9 d1 fc ff ff 44 89 e9 80 e1 07 80 c1 03 38 [ 68.439397][ T5051] RSP: 0018:ffffc900042ceee8 EFLAGS: 00010246 [ 68.445499][ T5051] RAX: 24219d6890ed2e00 RBX: 0000000000000519 RCX: ffff88807c40d940 [ 68.453478][ T5051] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 68.461484][ T5051] RBP: dffffc0000000000 R08: ffffffff815490c2 R09: 1ffff11017325172 [ 68.469485][ T5051] R10: dffffc0000000000 R11: ffffed1017325173 R12: 0000000000005653 [ 68.477484][ T5051] R13: 000000000000061f R14: ffff88807ec29640 R15: 0000000000000621 [ 68.485506][ T5051] FS: 0000555555600380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 68.494496][ T5051] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.501086][ T5051] CR2: 0000000020001000 CR3: 0000000074d2e000 CR4: 00000000003506f0 [ 68.509093][ T5051] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.517097][ T5051] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.525108][ T5051] Call Trace: [ 68.528390][ T5051] [ 68.531307][ T5051] ? __warn+0x162/0x4a0 [ 68.535488][ T5051] ? skb_checksum_help+0x6b1/0x740 [ 68.540630][ T5051] ? report_bug+0x2b3/0x500 [ 68.545200][ T5051] ? skb_checksum_help+0x6b1/0x740 [ 68.550341][ T5051] ? handle_bug+0x3d/0x70 [ 68.554709][ T5051] ? exc_invalid_op+0x1a/0x50 [ 68.559396][ T5051] ? asm_exc_invalid_op+0x1a/0x20 [ 68.564461][ T5051] ? __warn_printk+0x292/0x360 [ 68.569235][ T5051] ? skb_checksum_help+0x6b1/0x740 [ 68.574392][ T5051] ? skb_checksum_help+0x6b1/0x740 [ 68.579524][ T5051] ip_do_fragment+0x21a/0x1b00 [ 68.584289][ T5051] ? ip_fragment+0x210/0x210 [ 68.588929][ T5051] ? ip_frag_next+0xb10/0xb10 [ 68.593601][ T5051] ? lockdep_hardirqs_on+0x98/0x140 [ 68.598840][ T5051] ? ip_fragment+0x9a/0x210 [ 68.603348][ T5051] __ip_finish_output+0x2bd/0x4b0 [ 68.608410][ T5051] iptunnel_xmit+0x540/0x9b0 [ 68.613017][ T5051] ip_tunnel_xmit+0x20d8/0x2940 [ 68.617929][ T5051] ? tnl_update_pmtu+0x10b0/0x10b0 [ 68.623057][ T5051] ? validate_xmit_xfrm+0xc1/0x1260 [ 68.628297][ T5051] ? gre_build_header+0x25b/0x990 [ 68.633334][ T5051] ipgre_xmit+0x757/0xa50 [ 68.637709][ T5051] dev_hard_start_xmit+0x241/0x750 [ 68.642834][ T5051] __dev_queue_xmit+0x19d0/0x3a30 [ 68.647909][ T5051] ? __dev_queue_xmit+0x2c4/0x3a30 [ 68.653041][ T5051] ? skb_partial_csum_set+0x105/0x350 [ 68.658446][ T5051] ? netdev_core_pick_tx+0x330/0x330 [ 68.663743][ T5051] ? virtio_net_hdr_to_skb+0x70f/0x1240 [ 68.669333][ T5051] ? packet_extra_vlan_len_allowed+0x210/0x210 [ 68.675533][ T5051] ? packet_xmit+0x68/0x320 [ 68.680027][ T5051] packet_sendmsg+0x47e8/0x6240 [ 68.684954][ T5051] ? smack_socket_sendmsg+0x172/0x530 [ 68.690340][ T5051] ? smack_socket_connect+0x4e0/0x4e0 [ 68.695749][ T5051] ? tomoyo_socket_sendmsg_permission+0x287/0x410 [ 68.702177][ T5051] ? tomoyo_socket_bind_permission+0x340/0x340 [ 68.708363][ T5051] ? packet_getsockopt+0x1000/0x1000 [ 68.713654][ T5051] ? __import_iovec+0x552/0x880 [ 68.718540][ T5051] ? exc_page_fault+0x650/0x860 [ 68.723405][ T5051] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 68.728733][ T5051] ? security_socket_sendmsg+0x81/0xa0 [ 68.734201][ T5051] ? packet_getsockopt+0x1000/0x1000 [ 68.739522][ T5051] ____sys_sendmsg+0x592/0x890 [ 68.744298][ T5051] ? __sys_sendmsg_sock+0x30/0x30 [ 68.749371][ T5051] ? do_raw_spin_lock+0x14d/0x3a0 [ 68.754443][ T5051] __sys_sendmsg+0x2b0/0x3a0 [ 68.759042][ T5051] ? ____sys_sendmsg+0x890/0x890 [ 68.763971][ T5051] ? print_irqtrace_events+0x220/0x220 [ 68.769472][ T5051] ? _raw_spin_unlock_irq+0x2e/0x50 [ 68.774708][ T5051] ? ptrace_notify+0x278/0x380 [ 68.779472][ T5051] ? syscall_enter_from_user_mode+0x32/0x230 [ 68.785490][ T5051] ? syscall_enter_from_user_mode+0x8c/0x230 [ 68.791474][ T5051] do_syscall_64+0x44/0x110 [ 68.796009][ T5051] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 68.801910][ T5051] RIP: 0033:0x7fa74c50d499 [ 68.806357][ T5051] Code: 48 83 c4 28 c3 e8 d7 19 00 00 0f 1f 80 00 00 00 00 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 [ 68.826078][ T5051] RSP: 002b:00007ffdd00dbd88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 68.834523][ T5051] RAX: ffffffffffffffda RBX: 00007fa74c55a390 RCX: 00007fa74c50d499 [ 68.842511][ T5051] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 68.850519][ T5051] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 68.858519][ T5051] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdd00dbdd0 [ 68.866526][ T5051] R13: 00007ffdd00dbda0 R14: 0000000000000001 R15: 00007ffdd00dbdd0 [ 68.874545][ T5051] [ 68.877550][ T5051] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 68.884820][ T5051] CPU: 1 PID: 5051 Comm: syz-executor493 Not tainted 6.6.0-syzkaller-05843-g89ed67ef126c #0 [ 68.894882][ T5051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 68.905018][ T5051] Call Trace: [ 68.908322][ T5051] [ 68.911239][ T5051] dump_stack_lvl+0x1e7/0x2d0 [ 68.915912][ T5051] ? nf_tcp_handle_invalid+0x650/0x650 [ 68.921357][ T5051] ? panic+0x770/0x770 [ 68.925429][ T5051] ? vscnprintf+0x5d/0x80 [ 68.929760][ T5051] panic+0x30f/0x770 [ 68.933638][ T5051] ? __warn+0x171/0x4a0 [ 68.937780][ T5051] ? __memcpy_flushcache+0x2b0/0x2b0 [ 68.943053][ T5051] __warn+0x314/0x4a0 [ 68.947023][ T5051] ? skb_checksum_help+0x6b1/0x740 [ 68.952124][ T5051] report_bug+0x2b3/0x500 [ 68.956442][ T5051] ? skb_checksum_help+0x6b1/0x740 [ 68.961540][ T5051] handle_bug+0x3d/0x70 [ 68.965697][ T5051] exc_invalid_op+0x1a/0x50 [ 68.970218][ T5051] asm_exc_invalid_op+0x1a/0x20 [ 68.975086][ T5051] RIP: 0010:skb_checksum_help+0x6b1/0x740 [ 68.980812][ T5051] Code: ff df 48 8b 4c 24 18 0f b6 04 01 84 c0 0f 85 83 00 00 00 48 8b 04 24 2b 18 48 c7 c7 e0 4f 3b 8c 4c 89 fe 89 da e8 8f 60 60 f8 <0f> 0b bb ea ff ff ff e9 d1 fc ff ff 44 89 e9 80 e1 07 80 c1 03 38 [ 69.000404][ T5051] RSP: 0018:ffffc900042ceee8 EFLAGS: 00010246 [ 69.006455][ T5051] RAX: 24219d6890ed2e00 RBX: 0000000000000519 RCX: ffff88807c40d940 [ 69.014418][ T5051] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 69.022385][ T5051] RBP: dffffc0000000000 R08: ffffffff815490c2 R09: 1ffff11017325172 [ 69.030338][ T5051] R10: dffffc0000000000 R11: ffffed1017325173 R12: 0000000000005653 [ 69.038302][ T5051] R13: 000000000000061f R14: ffff88807ec29640 R15: 0000000000000621 [ 69.046357][ T5051] ? __warn_printk+0x292/0x360 [ 69.051116][ T5051] ? skb_checksum_help+0x6b1/0x740 [ 69.056223][ T5051] ip_do_fragment+0x21a/0x1b00 [ 69.060981][ T5051] ? ip_fragment+0x210/0x210 [ 69.065555][ T5051] ? ip_frag_next+0xb10/0xb10 [ 69.070214][ T5051] ? lockdep_hardirqs_on+0x98/0x140 [ 69.075414][ T5051] ? ip_fragment+0x9a/0x210 [ 69.079913][ T5051] __ip_finish_output+0x2bd/0x4b0 [ 69.084922][ T5051] iptunnel_xmit+0x540/0x9b0 [ 69.089501][ T5051] ip_tunnel_xmit+0x20d8/0x2940 [ 69.094380][ T5051] ? tnl_update_pmtu+0x10b0/0x10b0 [ 69.099489][ T5051] ? validate_xmit_xfrm+0xc1/0x1260 [ 69.104673][ T5051] ? gre_build_header+0x25b/0x990 [ 69.109682][ T5051] ipgre_xmit+0x757/0xa50 [ 69.114007][ T5051] dev_hard_start_xmit+0x241/0x750 [ 69.119116][ T5051] __dev_queue_xmit+0x19d0/0x3a30 [ 69.124134][ T5051] ? __dev_queue_xmit+0x2c4/0x3a30 [ 69.129241][ T5051] ? skb_partial_csum_set+0x105/0x350 [ 69.134612][ T5051] ? netdev_core_pick_tx+0x330/0x330 [ 69.139911][ T5051] ? virtio_net_hdr_to_skb+0x70f/0x1240 [ 69.145449][ T5051] ? packet_extra_vlan_len_allowed+0x210/0x210 [ 69.151586][ T5051] ? packet_xmit+0x68/0x320 [ 69.156084][ T5051] packet_sendmsg+0x47e8/0x6240 [ 69.160936][ T5051] ? smack_socket_sendmsg+0x172/0x530 [ 69.166296][ T5051] ? smack_socket_connect+0x4e0/0x4e0 [ 69.171650][ T5051] ? tomoyo_socket_sendmsg_permission+0x287/0x410 [ 69.178054][ T5051] ? tomoyo_socket_bind_permission+0x340/0x340 [ 69.184190][ T5051] ? packet_getsockopt+0x1000/0x1000 [ 69.189459][ T5051] ? __import_iovec+0x552/0x880 [ 69.194294][ T5051] ? exc_page_fault+0x650/0x860 [ 69.199142][ T5051] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 69.204420][ T5051] ? security_socket_sendmsg+0x81/0xa0 [ 69.209879][ T5051] ? packet_getsockopt+0x1000/0x1000 [ 69.215163][ T5051] ____sys_sendmsg+0x592/0x890 [ 69.219934][ T5051] ? __sys_sendmsg_sock+0x30/0x30 [ 69.224952][ T5051] ? do_raw_spin_lock+0x14d/0x3a0 [ 69.229968][ T5051] __sys_sendmsg+0x2b0/0x3a0 [ 69.234556][ T5051] ? ____sys_sendmsg+0x890/0x890 [ 69.239506][ T5051] ? print_irqtrace_events+0x220/0x220 [ 69.244953][ T5051] ? _raw_spin_unlock_irq+0x2e/0x50 [ 69.250133][ T5051] ? ptrace_notify+0x278/0x380 [ 69.254909][ T5051] ? syscall_enter_from_user_mode+0x32/0x230 [ 69.260890][ T5051] ? syscall_enter_from_user_mode+0x8c/0x230 [ 69.266856][ T5051] do_syscall_64+0x44/0x110 [ 69.271345][ T5051] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 69.277226][ T5051] RIP: 0033:0x7fa74c50d499 [ 69.281625][ T5051] Code: 48 83 c4 28 c3 e8 d7 19 00 00 0f 1f 80 00 00 00 00 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 [ 69.301218][ T5051] RSP: 002b:00007ffdd00dbd88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 69.309625][ T5051] RAX: ffffffffffffffda RBX: 00007fa74c55a390 RCX: 00007fa74c50d499 [ 69.317585][ T5051] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 69.325547][ T5051] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 69.333501][ T5051] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdd00dbdd0 [ 69.341456][ T5051] R13: 00007ffdd00dbda0 R14: 0000000000000001 R15: 00007ffdd00dbdd0 [ 69.349422][ T5051] [ 69.352685][ T5051] Kernel Offset: disabled [ 69.357065][ T5051] Rebooting in 86400 seconds..