./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor814639057 <...> Warning: Permanently added '10.128.0.209' (ED25519) to the list of known hosts. execve("./syz-executor814639057", ["./syz-executor814639057"], 0x7fff5382a9a0 /* 10 vars */) = 0 brk(NULL) = 0x555556a5b000 brk(0x555556a5bd00) = 0x555556a5bd00 arch_prctl(ARCH_SET_FS, 0x555556a5b380) = 0 set_tid_address(0x555556a5b650) = 5045 set_robust_list(0x555556a5b660, 24) = 0 rseq(0x555556a5bca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor814639057", 4096) = 27 getrandom("\x06\x4b\x31\xd3\x52\x32\x6d\x13", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556a5bd00 brk(0x555556a7cd00) = 0x555556a7cd00 brk(0x555556a7d000) = 0x555556a7d000 mprotect(0x7f81492e9000, 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./strace-static-x86_64: Process 5046 attached , child_tidptr=0x555556a5b650) = 5046 [pid 5046] set_robust_list(0x555556a5b660, 24) = 0 [pid 5046] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5046] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5046] setsid() = 1 [pid 5046] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5046] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5046] unshare(CLONE_NEWNS) = 0 [pid 5046] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5046] unshare(CLONE_NEWIPC) = 0 [pid 5046] unshare(CLONE_NEWCGROUP) = 0 [pid 5046] unshare(CLONE_NEWUTS) = 0 [pid 5046] unshare(CLONE_SYSVSEM) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "16777216", 8) = 8 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "536870912", 9) = 9 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "8192", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5046] close(3) = 0 [pid 5046] getpid() = 1 [pid 5046] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< skb_headlen() (1305) [ 68.268876][ T5046] WARNING: CPU: 0 PID: 5046 at net/core/dev.c:3302 skb_checksum_help+0x6b1/0x740 [ 68.278038][ T5046] Modules linked in: [ 68.281914][ T5046] CPU: 0 PID: 5046 Comm: syz-executor814 Not tainted 6.6.0-syzkaller-05843-g89ed67ef126c #0 [ 68.291996][ T5046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 68.302072][ T5046] RIP: 0010:skb_checksum_help+0x6b1/0x740 [ 68.307822][ T5046] 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 [ 68.327484][ T5046] RSP: 0018:ffffc9000397eee8 EFLAGS: 00010246 [ 68.333540][ T5046] RAX: 8863687deb105b00 RBX: 0000000000000519 RCX: ffff88802396bb80 [ 68.341540][ T5046] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 68.349548][ T5046] RBP: dffffc0000000000 R08: ffffffff815490c2 R09: 1ffff9200072fd30 [ 68.357553][ T5046] R10: dffffc0000000000 R11: fffff5200072fd31 R12: 0000000000005653 [ 68.365598][ T5046] R13: 000000000000061f R14: ffff8880254dbc80 R15: 0000000000000621 [ 68.373558][ T5046] FS: 0000555556a5b380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 68.382513][ T5046] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.389133][ T5046] CR2: 0000000020001000 CR3: 000000007c5b2000 CR4: 00000000003506f0 [ 68.397136][ T5046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.405132][ T5046] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.413099][ T5046] Call Trace: [ 68.416403][ T5046] [ 68.419349][ T5046] ? __warn+0x162/0x4a0 [ 68.423491][ T5046] ? skb_checksum_help+0x6b1/0x740 [ 68.428640][ T5046] ? report_bug+0x2b3/0x500 [ 68.433172][ T5046] ? skb_checksum_help+0x6b1/0x740 [ 68.438326][ T5046] ? handle_bug+0x3d/0x70 [ 68.442665][ T5046] ? exc_invalid_op+0x1a/0x50 [ 68.447373][ T5046] ? asm_exc_invalid_op+0x1a/0x20 [ 68.452412][ T5046] ? __warn_printk+0x292/0x360 [ 68.457209][ T5046] ? skb_checksum_help+0x6b1/0x740 [ 68.462336][ T5046] ? skb_checksum_help+0x6b1/0x740 [ 68.467494][ T5046] ip_do_fragment+0x21a/0x1b00 [ 68.472297][ T5046] ? ip_fragment+0x210/0x210 [ 68.476916][ T5046] ? ip_frag_next+0xb10/0xb10 [ 68.481621][ T5046] ? lockdep_hardirqs_on+0x98/0x140 [ 68.486858][ T5046] ? ip_fragment+0x9a/0x210 [ 68.491367][ T5046] __ip_finish_output+0x2bd/0x4b0 [ 68.496426][ T5046] iptunnel_xmit+0x540/0x9b0 [ 68.501030][ T5046] ip_tunnel_xmit+0x20d8/0x2940 [ 68.505940][ T5046] ? tnl_update_pmtu+0x10b0/0x10b0 [ 68.511069][ T5046] ? validate_xmit_xfrm+0xc1/0x1260 [ 68.516307][ T5046] ? gre_build_header+0x25b/0x990 [ 68.521344][ T5046] ipgre_xmit+0x757/0xa50 [ 68.525715][ T5046] dev_hard_start_xmit+0x241/0x750 [ 68.530857][ T5046] __dev_queue_xmit+0x19d0/0x3a30 [ 68.535929][ T5046] ? __dev_queue_xmit+0x2c4/0x3a30 [ 68.541087][ T5046] ? skb_partial_csum_set+0x105/0x350 [ 68.546497][ T5046] ? netdev_core_pick_tx+0x330/0x330 [ 68.551796][ T5046] ? virtio_net_hdr_to_skb+0x70f/0x1240 [ 68.557394][ T5046] ? packet_extra_vlan_len_allowed+0x210/0x210 [ 68.563560][ T5046] ? packet_xmit+0x68/0x320 [ 68.568213][ T5046] packet_sendmsg+0x47e8/0x6240 [ 68.573101][ T5046] ? smack_socket_sendmsg+0x172/0x530 [ 68.578510][ T5046] ? smack_socket_connect+0x4e0/0x4e0 [ 68.583898][ T5046] ? tomoyo_socket_sendmsg_permission+0x287/0x410 [ 68.590367][ T5046] ? tomoyo_socket_bind_permission+0x340/0x340 [ 68.596559][ T5046] ? packet_getsockopt+0x1000/0x1000 [ 68.601836][ T5046] ? __import_iovec+0x552/0x880 [ 68.606720][ T5046] ? exc_page_fault+0x650/0x860 [ 68.611582][ T5046] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 68.616902][ T5046] ? security_socket_sendmsg+0x81/0xa0 [ 68.622406][ T5046] ? packet_getsockopt+0x1000/0x1000 [ 68.627726][ T5046] ____sys_sendmsg+0x592/0x890 [ 68.632517][ T5046] ? __sys_sendmsg_sock+0x30/0x30 [ 68.637574][ T5046] ? do_raw_spin_lock+0x14d/0x3a0 [ 68.642616][ T5046] __sys_sendmsg+0x2b0/0x3a0 [ 68.647240][ T5046] ? ____sys_sendmsg+0x890/0x890 [ 68.652198][ T5046] ? print_irqtrace_events+0x220/0x220 [ 68.657697][ T5046] ? _raw_spin_unlock_irq+0x2e/0x50 [ 68.662896][ T5046] ? ptrace_notify+0x278/0x380 [ 68.667709][ T5046] ? syscall_enter_from_user_mode+0x32/0x230 [ 68.673913][ T5046] ? syscall_enter_from_user_mode+0x8c/0x230 [ 68.679999][ T5046] do_syscall_64+0x44/0x110 [ 68.684524][ T5046] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 68.690450][ T5046] RIP: 0033:0x7f8149271499 [ 68.694881][ T5046] 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 [ 68.714516][ T5046] RSP: 002b:00007ffdd8220c18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 68.722961][ T5046] RAX: ffffffffffffffda RBX: 00007f81492be390 RCX: 00007f8149271499 [ 68.730961][ T5046] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 68.738987][ T5046] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 68.746998][ T5046] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdd8220c60 [ 68.755011][ T5046] R13: 00007ffdd8220c30 R14: 0000000000000001 R15: 00007ffdd8220c60 [ 68.762980][ T5046] [ 68.766024][ T5046] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 68.773303][ T5046] CPU: 0 PID: 5046 Comm: syz-executor814 Not tainted 6.6.0-syzkaller-05843-g89ed67ef126c #0 [ 68.783353][ T5046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 68.793484][ T5046] Call Trace: [ 68.796753][ T5046] [ 68.799688][ T5046] dump_stack_lvl+0x1e7/0x2d0 [ 68.804376][ T5046] ? nf_tcp_handle_invalid+0x650/0x650 [ 68.809860][ T5046] ? panic+0x770/0x770 [ 68.813926][ T5046] ? vscnprintf+0x5d/0x80 [ 68.818244][ T5046] panic+0x30f/0x770 [ 68.822139][ T5046] ? __warn+0x171/0x4a0 [ 68.826288][ T5046] ? __memcpy_flushcache+0x2b0/0x2b0 [ 68.831570][ T5046] __warn+0x314/0x4a0 [ 68.835543][ T5046] ? skb_checksum_help+0x6b1/0x740 [ 68.840643][ T5046] report_bug+0x2b3/0x500 [ 68.844967][ T5046] ? skb_checksum_help+0x6b1/0x740 [ 68.850087][ T5046] handle_bug+0x3d/0x70 [ 68.854883][ T5046] exc_invalid_op+0x1a/0x50 [ 68.859388][ T5046] asm_exc_invalid_op+0x1a/0x20 [ 68.864242][ T5046] RIP: 0010:skb_checksum_help+0x6b1/0x740 [ 68.869958][ T5046] 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 [ 68.889555][ T5046] RSP: 0018:ffffc9000397eee8 EFLAGS: 00010246 [ 68.895609][ T5046] RAX: 8863687deb105b00 RBX: 0000000000000519 RCX: ffff88802396bb80 [ 68.903578][ T5046] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 68.911543][ T5046] RBP: dffffc0000000000 R08: ffffffff815490c2 R09: 1ffff9200072fd30 [ 68.919504][ T5046] R10: dffffc0000000000 R11: fffff5200072fd31 R12: 0000000000005653 [ 68.927475][ T5046] R13: 000000000000061f R14: ffff8880254dbc80 R15: 0000000000000621 [ 68.935456][ T5046] ? __warn_printk+0x292/0x360 [ 68.940229][ T5046] ? skb_checksum_help+0x6b1/0x740 [ 68.945357][ T5046] ip_do_fragment+0x21a/0x1b00 [ 68.950128][ T5046] ? ip_fragment+0x210/0x210 [ 68.954701][ T5046] ? ip_frag_next+0xb10/0xb10 [ 68.959362][ T5046] ? lockdep_hardirqs_on+0x98/0x140 [ 68.964549][ T5046] ? ip_fragment+0x9a/0x210 [ 68.969050][ T5046] __ip_finish_output+0x2bd/0x4b0 [ 68.974062][ T5046] iptunnel_xmit+0x540/0x9b0 [ 68.978678][ T5046] ip_tunnel_xmit+0x20d8/0x2940 [ 68.983530][ T5046] ? tnl_update_pmtu+0x10b0/0x10b0 [ 68.988641][ T5046] ? validate_xmit_xfrm+0xc1/0x1260 [ 68.993839][ T5046] ? gre_build_header+0x25b/0x990 [ 68.998868][ T5046] ipgre_xmit+0x757/0xa50 [ 69.003206][ T5046] dev_hard_start_xmit+0x241/0x750 [ 69.008321][ T5046] __dev_queue_xmit+0x19d0/0x3a30 [ 69.013353][ T5046] ? __dev_queue_xmit+0x2c4/0x3a30 [ 69.018461][ T5046] ? skb_partial_csum_set+0x105/0x350 [ 69.023829][ T5046] ? netdev_core_pick_tx+0x330/0x330 [ 69.029110][ T5046] ? virtio_net_hdr_to_skb+0x70f/0x1240 [ 69.034650][ T5046] ? packet_extra_vlan_len_allowed+0x210/0x210 [ 69.040790][ T5046] ? packet_xmit+0x68/0x320 [ 69.045286][ T5046] packet_sendmsg+0x47e8/0x6240 [ 69.050141][ T5046] ? smack_socket_sendmsg+0x172/0x530 [ 69.055504][ T5046] ? smack_socket_connect+0x4e0/0x4e0 [ 69.060860][ T5046] ? tomoyo_socket_sendmsg_permission+0x287/0x410 [ 69.067281][ T5046] ? tomoyo_socket_bind_permission+0x340/0x340 [ 69.073428][ T5046] ? packet_getsockopt+0x1000/0x1000 [ 69.078702][ T5046] ? __import_iovec+0x552/0x880 [ 69.083537][ T5046] ? exc_page_fault+0x650/0x860 [ 69.088380][ T5046] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 69.093652][ T5046] ? security_socket_sendmsg+0x81/0xa0 [ 69.099101][ T5046] ? packet_getsockopt+0x1000/0x1000 [ 69.104371][ T5046] ____sys_sendmsg+0x592/0x890 [ 69.109128][ T5046] ? __sys_sendmsg_sock+0x30/0x30 [ 69.114144][ T5046] ? do_raw_spin_lock+0x14d/0x3a0 [ 69.119161][ T5046] __sys_sendmsg+0x2b0/0x3a0 [ 69.123734][ T5046] ? ____sys_sendmsg+0x890/0x890 [ 69.128666][ T5046] ? print_irqtrace_events+0x220/0x220 [ 69.134115][ T5046] ? _raw_spin_unlock_irq+0x2e/0x50 [ 69.139299][ T5046] ? ptrace_notify+0x278/0x380 [ 69.144056][ T5046] ? syscall_enter_from_user_mode+0x32/0x230 [ 69.150034][ T5046] ? syscall_enter_from_user_mode+0x8c/0x230 [ 69.156006][ T5046] do_syscall_64+0x44/0x110 [ 69.160499][ T5046] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 69.166379][ T5046] RIP: 0033:0x7f8149271499 [ 69.170780][ T5046] 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 [ 69.190371][ T5046] RSP: 002b:00007ffdd8220c18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 69.198770][ T5046] RAX: ffffffffffffffda RBX: 00007f81492be390 RCX: 00007f8149271499 [ 69.206729][ T5046] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 69.214697][ T5046] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 69.222654][ T5046] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdd8220c60 [ 69.230620][ T5046] R13: 00007ffdd8220c30 R14: 0000000000000001 R15: 00007ffdd8220c60 [ 69.238690][ T5046] [ 69.242016][ T5046] Kernel Offset: disabled [ 69.246394][ T5046] Rebooting in 86400 seconds..