./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2164133751 <...> Warning: Permanently added '10.128.0.111' (ED25519) to the list of known hosts. execve("./syz-executor2164133751", ["./syz-executor2164133751"], 0x7ffd6ef58a60 /* 10 vars */) = 0 brk(NULL) = 0x555557479000 brk(0x555557479d00) = 0x555557479d00 arch_prctl(ARCH_SET_FS, 0x555557479380) = 0 set_tid_address(0x555557479650) = 5051 set_robust_list(0x555557479660, 24) = 0 rseq(0x555557479ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2164133751", 4096) = 28 getrandom("\x89\x4d\x14\xd8\xe6\x8f\x5d\x28", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557479d00 brk(0x55555749ad00) = 0x55555749ad00 brk(0x55555749b000) = 0x55555749b000 mprotect(0x7f9e23126000, 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=0x555557479650) = 5052 ./strace-static-x86_64: Process 5052 attached [pid 5052] set_robust_list(0x555557479660, 24) = 0 [pid 5052] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5052] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5052] setsid() = 1 [pid 5052] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5052] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5052] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5052] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5052] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5052] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5052] unshare(CLONE_NEWNS) = 0 [pid 5052] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5052] unshare(CLONE_NEWIPC) = 0 [pid 5052] unshare(CLONE_NEWCGROUP) = 0 [pid 5052] unshare(CLONE_NEWUTS) = 0 [pid 5052] unshare(CLONE_SYSVSEM) = 0 [pid 5052] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "16777216", 8) = 8 [pid 5052] close(3) = 0 [pid 5052] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "536870912", 9) = 9 [pid 5052] close(3) = 0 [pid 5052] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "1024", 4) = 4 [pid 5052] close(3) = 0 [pid 5052] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "8192", 4) = 4 [pid 5052] close(3) = 0 [pid 5052] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "1024", 4) = 4 [pid 5052] close(3) = 0 [pid 5052] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "1024", 4) = 4 [pid 5052] close(3) = 0 [pid 5052] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5052] close(3) = 0 [pid 5052] getpid() = 1 [pid 5052] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< skb_headlen() (1305) [ 95.643599][ T5052] WARNING: CPU: 0 PID: 5052 at net/core/dev.c:3302 skb_checksum_help+0x6b1/0x740 [ 95.652927][ T5052] Modules linked in: [ 95.656877][ T5052] CPU: 0 PID: 5052 Comm: syz-executor216 Not tainted 6.6.0-syzkaller-05843-g89ed67ef126c #0 [ 95.667273][ T5052] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 95.677656][ T5052] RIP: 0010:skb_checksum_help+0x6b1/0x740 [ 95.683412][ T5052] 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 [ 95.703170][ T5052] RSP: 0018:ffffc900039ceee8 EFLAGS: 00010246 [ 95.709315][ T5052] RAX: b34b00530523fe00 RBX: 0000000000000519 RCX: ffff888014f08000 [ 95.717619][ T5052] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 95.725617][ T5052] RBP: dffffc0000000000 R08: ffffffff815490c2 R09: 1ffff11017305172 [ 95.733859][ T5052] R10: dffffc0000000000 R11: ffffed1017305173 R12: 0000000000005653 [ 95.741897][ T5052] R13: 000000000000061f R14: ffff88801c0d43c0 R15: 0000000000000621 [ 95.749964][ T5052] FS: 0000555557479380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 95.759174][ T5052] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.766408][ T5052] CR2: 0000000020001000 CR3: 0000000029e25000 CR4: 00000000003506f0 [ 95.774545][ T5052] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.782606][ T5052] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.790652][ T5052] Call Trace: [ 95.793983][ T5052] [ 95.796985][ T5052] ? __warn+0x162/0x4a0 [ 95.801179][ T5052] ? skb_checksum_help+0x6b1/0x740 [ 95.806307][ T5052] ? report_bug+0x2b3/0x500 [ 95.810955][ T5052] ? skb_checksum_help+0x6b1/0x740 [ 95.816111][ T5052] ? handle_bug+0x3d/0x70 [ 95.820519][ T5052] ? exc_invalid_op+0x1a/0x50 [ 95.825534][ T5052] ? asm_exc_invalid_op+0x1a/0x20 [ 95.830668][ T5052] ? __warn_printk+0x292/0x360 [ 95.835477][ T5052] ? skb_checksum_help+0x6b1/0x740 [ 95.840678][ T5052] ? skb_checksum_help+0x6b1/0x740 [ 95.845832][ T5052] ip_do_fragment+0x21a/0x1b00 [ 95.850676][ T5052] ? ip_fragment+0x210/0x210 [ 95.855293][ T5052] ? ip_frag_next+0xb10/0xb10 [ 95.860053][ T5052] ? lockdep_hardirqs_on+0x98/0x140 [ 95.865289][ T5052] ? ip_fragment+0x9a/0x210 [ 95.869887][ T5052] __ip_finish_output+0x2bd/0x4b0 [ 95.874950][ T5052] iptunnel_xmit+0x540/0x9b0 [ 95.879645][ T5052] ip_tunnel_xmit+0x20d8/0x2940 [ 95.884576][ T5052] ? tnl_update_pmtu+0x10b0/0x10b0 [ 95.889761][ T5052] ? validate_xmit_xfrm+0xc1/0x1260 [ 95.895010][ T5052] ? gre_build_header+0x25b/0x990 [ 95.900211][ T5052] ipgre_xmit+0x757/0xa50 [ 95.904598][ T5052] dev_hard_start_xmit+0x241/0x750 [ 95.909845][ T5052] __dev_queue_xmit+0x19d0/0x3a30 [ 95.915040][ T5052] ? __dev_queue_xmit+0x2c4/0x3a30 [ 95.920232][ T5052] ? skb_partial_csum_set+0x105/0x350 [ 95.925623][ T5052] ? netdev_core_pick_tx+0x330/0x330 [ 95.930991][ T5052] ? virtio_net_hdr_to_skb+0x70f/0x1240 [ 95.936586][ T5052] ? packet_extra_vlan_len_allowed+0x210/0x210 [ 95.942838][ T5052] ? packet_xmit+0x68/0x320 [ 95.947422][ T5052] packet_sendmsg+0x47e8/0x6240 [ 95.952349][ T5052] ? smack_socket_sendmsg+0x172/0x530 [ 95.957820][ T5052] ? smack_socket_connect+0x4e0/0x4e0 [ 95.963222][ T5052] ? tomoyo_socket_sendmsg_permission+0x287/0x410 [ 95.969731][ T5052] ? tomoyo_socket_bind_permission+0x340/0x340 [ 95.975928][ T5052] ? packet_getsockopt+0x1000/0x1000 [ 95.981292][ T5052] ? __import_iovec+0x552/0x880 [ 95.986227][ T5052] ? exc_page_fault+0x650/0x860 [ 95.991168][ T5052] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 95.996569][ T5052] ? security_socket_sendmsg+0x81/0xa0 [ 96.002605][ T5052] ? packet_getsockopt+0x1000/0x1000 [ 96.011996][ T5052] ____sys_sendmsg+0x592/0x890 [ 96.024189][ T5052] ? __sys_sendmsg_sock+0x30/0x30 [ 96.033064][ T5052] ? do_raw_spin_lock+0x14d/0x3a0 [ 96.044759][ T5052] __sys_sendmsg+0x2b0/0x3a0 [ 96.059376][ T5052] ? ____sys_sendmsg+0x890/0x890 [ 96.072167][ T5052] ? print_irqtrace_events+0x220/0x220 [ 96.085957][ T5052] ? _raw_spin_unlock_irq+0x2e/0x50 [ 96.093518][ T5052] ? ptrace_notify+0x278/0x380 [ 96.099592][ T5052] ? syscall_enter_from_user_mode+0x32/0x230 [ 96.105614][ T5052] ? syscall_enter_from_user_mode+0x8c/0x230 [ 96.111714][ T5052] do_syscall_64+0x44/0x110 [ 96.116267][ T5052] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 96.122238][ T5052] RIP: 0033:0x7f9e230ae499 [ 96.126742][ T5052] 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 [ 96.146440][ T5052] RSP: 002b:00007ffdfbe76478 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 96.155053][ T5052] RAX: ffffffffffffffda RBX: 00007f9e230fb390 RCX: 00007f9e230ae499 [ 96.163220][ T5052] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 96.171265][ T5052] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 96.179300][ T5052] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdfbe764c0 [ 96.187390][ T5052] R13: 00007ffdfbe76490 R14: 0000000000000001 R15: 00007ffdfbe764c0 [ 96.195418][ T5052] [ 96.198546][ T5052] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 96.205854][ T5052] CPU: 0 PID: 5052 Comm: syz-executor216 Not tainted 6.6.0-syzkaller-05843-g89ed67ef126c #0 [ 96.215930][ T5052] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 96.226097][ T5052] Call Trace: [ 96.229412][ T5052] [ 96.232372][ T5052] dump_stack_lvl+0x1e7/0x2d0 [ 96.237090][ T5052] ? nf_tcp_handle_invalid+0x650/0x650 [ 96.242769][ T5052] ? panic+0x770/0x770 [ 96.246877][ T5052] ? vscnprintf+0x5d/0x80 [ 96.251236][ T5052] panic+0x30f/0x770 [ 96.255149][ T5052] ? __warn+0x171/0x4a0 [ 96.259335][ T5052] ? __memcpy_flushcache+0x2b0/0x2b0 [ 96.264647][ T5052] __warn+0x314/0x4a0 [ 96.268640][ T5052] ? skb_checksum_help+0x6b1/0x740 [ 96.273769][ T5052] report_bug+0x2b3/0x500 [ 96.278119][ T5052] ? skb_checksum_help+0x6b1/0x740 [ 96.283254][ T5052] handle_bug+0x3d/0x70 [ 96.287429][ T5052] exc_invalid_op+0x1a/0x50 [ 96.291949][ T5052] asm_exc_invalid_op+0x1a/0x20 [ 96.296817][ T5052] RIP: 0010:skb_checksum_help+0x6b1/0x740 [ 96.302646][ T5052] 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 [ 96.322263][ T5052] RSP: 0018:ffffc900039ceee8 EFLAGS: 00010246 [ 96.328351][ T5052] RAX: b34b00530523fe00 RBX: 0000000000000519 RCX: ffff888014f08000 [ 96.336421][ T5052] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 96.344400][ T5052] RBP: dffffc0000000000 R08: ffffffff815490c2 R09: 1ffff11017305172 [ 96.352396][ T5052] R10: dffffc0000000000 R11: ffffed1017305173 R12: 0000000000005653 [ 96.360388][ T5052] R13: 000000000000061f R14: ffff88801c0d43c0 R15: 0000000000000621 [ 96.368386][ T5052] ? __warn_printk+0x292/0x360 [ 96.373172][ T5052] ? skb_checksum_help+0x6b1/0x740 [ 96.378321][ T5052] ip_do_fragment+0x21a/0x1b00 [ 96.383114][ T5052] ? ip_fragment+0x210/0x210 [ 96.387717][ T5052] ? ip_frag_next+0xb10/0xb10 [ 96.392403][ T5052] ? lockdep_hardirqs_on+0x98/0x140 [ 96.397619][ T5052] ? ip_fragment+0x9a/0x210 [ 96.402133][ T5052] __ip_finish_output+0x2bd/0x4b0 [ 96.407172][ T5052] iptunnel_xmit+0x540/0x9b0 [ 96.411789][ T5052] ip_tunnel_xmit+0x20d8/0x2940 [ 96.416683][ T5052] ? tnl_update_pmtu+0x10b0/0x10b0 [ 96.421811][ T5052] ? validate_xmit_xfrm+0xc1/0x1260 [ 96.427029][ T5052] ? gre_build_header+0x25b/0x990 [ 96.432075][ T5052] ipgre_xmit+0x757/0xa50 [ 96.436424][ T5052] dev_hard_start_xmit+0x241/0x750 [ 96.441671][ T5052] __dev_queue_xmit+0x19d0/0x3a30 [ 96.448743][ T5052] ? __dev_queue_xmit+0x2c4/0x3a30 [ 96.453888][ T5052] ? skb_partial_csum_set+0x105/0x350 [ 96.459284][ T5052] ? netdev_core_pick_tx+0x330/0x330 [ 96.464629][ T5052] ? virtio_net_hdr_to_skb+0x70f/0x1240 [ 96.470221][ T5052] ? packet_extra_vlan_len_allowed+0x210/0x210 [ 96.476421][ T5052] ? packet_xmit+0x68/0x320 [ 96.480947][ T5052] packet_sendmsg+0x47e8/0x6240 [ 96.485849][ T5052] ? smack_socket_sendmsg+0x172/0x530 [ 96.491241][ T5052] ? smack_socket_connect+0x4e0/0x4e0 [ 96.496703][ T5052] ? tomoyo_socket_sendmsg_permission+0x287/0x410 [ 96.503415][ T5052] ? tomoyo_socket_bind_permission+0x340/0x340 [ 96.509611][ T5052] ? packet_getsockopt+0x1000/0x1000 [ 96.515022][ T5052] ? __import_iovec+0x552/0x880 [ 96.519908][ T5052] ? exc_page_fault+0x650/0x860 [ 96.524797][ T5052] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 96.530169][ T5052] ? security_socket_sendmsg+0x81/0xa0 [ 96.535674][ T5052] ? packet_getsockopt+0x1000/0x1000 [ 96.541019][ T5052] ____sys_sendmsg+0x592/0x890 [ 96.545869][ T5052] ? __sys_sendmsg_sock+0x30/0x30 [ 96.551013][ T5052] ? do_raw_spin_lock+0x14d/0x3a0 [ 96.556100][ T5052] __sys_sendmsg+0x2b0/0x3a0 [ 96.560737][ T5052] ? ____sys_sendmsg+0x890/0x890 [ 96.565736][ T5052] ? print_irqtrace_events+0x220/0x220 [ 96.571273][ T5052] ? _raw_spin_unlock_irq+0x2e/0x50 [ 96.576509][ T5052] ? ptrace_notify+0x278/0x380 [ 96.581317][ T5052] ? syscall_enter_from_user_mode+0x32/0x230 [ 96.587332][ T5052] ? syscall_enter_from_user_mode+0x8c/0x230 [ 96.593362][ T5052] do_syscall_64+0x44/0x110 [ 96.597945][ T5052] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 96.603979][ T5052] RIP: 0033:0x7f9e230ae499 [ 96.608418][ T5052] 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 [ 96.628058][ T5052] RSP: 002b:00007ffdfbe76478 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 96.636553][ T5052] RAX: ffffffffffffffda RBX: 00007f9e230fb390 RCX: 00007f9e230ae499 [ 96.644547][ T5052] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 96.652556][ T5052] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 96.660547][ T5052] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdfbe764c0 [ 96.668529][ T5052] R13: 00007ffdfbe76490 R14: 0000000000000001 R15: 00007ffdfbe764c0 [ 96.676523][ T5052] [ 96.679776][ T5052] Kernel Offset: disabled [ 96.684189][ T5052] Rebooting in 86400 seconds..