./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1231396658 <...> Warning: Permanently added '10.128.0.222' (ED25519) to the list of known hosts. execve("./syz-executor1231396658", ["./syz-executor1231396658"], 0x7ffdff268f90 /* 10 vars */) = 0 brk(NULL) = 0x5555558ca000 brk(0x5555558cad00) = 0x5555558cad00 arch_prctl(ARCH_SET_FS, 0x5555558ca380) = 0 set_tid_address(0x5555558ca650) = 5054 set_robust_list(0x5555558ca660, 24) = 0 rseq(0x5555558caca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1231396658", 4096) = 28 getrandom("\xde\xac\x9c\x43\x7a\xcf\xf3\x26", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555558cad00 brk(0x5555558ebd00) = 0x5555558ebd00 brk(0x5555558ec000) = 0x5555558ec000 mprotect(0x7f12595ca000, 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 5055 attached , child_tidptr=0x5555558ca650) = 5055 [pid 5055] set_robust_list(0x5555558ca660, 24) = 0 [pid 5055] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5055] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5055] setsid() = 1 [pid 5055] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5055] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5055] unshare(CLONE_NEWNS) = 0 [pid 5055] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5055] unshare(CLONE_NEWIPC) = 0 [pid 5055] unshare(CLONE_NEWCGROUP) = 0 [pid 5055] unshare(CLONE_NEWUTS) = 0 [pid 5055] unshare(CLONE_SYSVSEM) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "16777216", 8) = 8 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "536870912", 9) = 9 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "8192", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5055] close(3) = 0 [pid 5055] getpid() = 1 [pid 5055] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<= skb_headlen() (104) [ 61.667862][ T5055] WARNING: CPU: 0 PID: 5055 at net/core/dev.c:3293 skb_checksum_help+0x52e/0x740 [ 61.677062][ T5055] Modules linked in: [ 61.680963][ T5055] CPU: 0 PID: 5055 Comm: syz-executor123 Not tainted 6.8.0-rc1-syzkaller-00311-g3a5879d495b2 #0 [ 61.691413][ T5055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 61.701551][ T5055] RIP: 0010:skb_checksum_help+0x52e/0x740 [ 61.707358][ T5055] Code: 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 00 02 00 00 44 89 e2 2b 53 74 44 89 ee 48 c7 c7 c0 95 ea 8b e8 93 86 d2 f8 90 <0f> 0b 90 90 e9 42 ff ff ff e8 e4 92 0c f9 44 0f b6 25 b7 7c a9 06 [ 61.727009][ T5055] RSP: 0018:ffffc900042b7088 EFLAGS: 00010286 [ 61.733067][ T5055] RAX: 0000000000000000 RBX: ffff88802d135dc0 RCX: ffffffff814e18f9 [ 61.741095][ T5055] RDX: ffff888023860000 RSI: ffffffff814e1906 RDI: 0000000000000001 [ 61.749097][ T5055] RBP: ffff88802d135e34 R08: 0000000000000001 R09: 0000000000000000 [ 61.757106][ T5055] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000002969 [ 61.765188][ T5055] R13: 0000000000000529 R14: ffff88802d135e30 R15: 00000000000005d1 [ 61.773144][ T5055] FS: 00005555558ca380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 61.782140][ T5055] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.788772][ T5055] CR2: 000000002000d000 CR3: 0000000077b44000 CR4: 0000000000350ef0 [ 61.796776][ T5055] Call Trace: [ 61.800057][ T5055] [ 61.802970][ T5055] ? show_regs+0x8f/0xa0 [ 61.807259][ T5055] ? __warn+0xe6/0x390 [ 61.811345][ T5055] ? skb_checksum_help+0x52e/0x740 [ 61.816519][ T5055] ? report_bug+0x3bc/0x580 [ 61.821050][ T5055] ? handle_bug+0x3d/0x70 [ 61.825450][ T5055] ? exc_invalid_op+0x17/0x40 [ 61.830155][ T5055] ? asm_exc_invalid_op+0x1a/0x20 [ 61.835248][ T5055] ? __warn_printk+0x199/0x350 [ 61.840026][ T5055] ? __warn_printk+0x1a6/0x350 [ 61.844827][ T5055] ? skb_checksum_help+0x52e/0x740 [ 61.849960][ T5055] ? skb_checksum_help+0x52d/0x740 [ 61.855114][ T5055] ip_do_fragment+0xa15/0x18a0 [ 61.859896][ T5055] ? ip_fragment.constprop.0+0x230/0x230 [ 61.865571][ T5055] ? ip_skb_dst_mtu+0xc60/0xc60 [ 61.870436][ T5055] ? kfree_skbmem+0xef/0x1b0 [ 61.875054][ T5055] ? __kasan_slab_free+0x12c/0x1b0 [ 61.880181][ T5055] ? kmem_cache_free+0x129/0x350 [ 61.885149][ T5055] ? skb_release_data+0x5bf/0x870 [ 61.890203][ T5055] ? kfree_skbmem+0xef/0x1b0 [ 61.894828][ T5055] ip_fragment.constprop.0+0x161/0x230 [ 61.900299][ T5055] __ip_finish_output+0x49c/0x650 [ 61.905352][ T5055] ip_finish_output+0x31/0x310 [ 61.910134][ T5055] ip_mc_output+0x1dd/0x6a0 [ 61.914690][ T5055] ? __get_random_u32_below+0x4e/0xa0 [ 61.920081][ T5055] ip_local_out+0xaf/0x1a0 [ 61.924526][ T5055] iptunnel_xmit+0x5b4/0x9b0 [ 61.929135][ T5055] ip_tunnel_xmit+0x1daa/0x33b0 [ 61.934029][ T5055] ? reacquire_held_locks+0x410/0x4c0 [ 61.939413][ T5055] ? ip_md_tunnel_xmit+0x1ff0/0x1ff0 [ 61.944780][ T5055] ? __gre_xmit+0x4f5/0x980 [ 61.949316][ T5055] ipgre_xmit+0x49b/0x980 [ 61.953707][ T5055] dev_hard_start_xmit+0x137/0x6d0 [ 61.958863][ T5055] __dev_queue_xmit+0x7b6/0x3ed0 [ 61.963864][ T5055] ? _copy_from_iter+0x2c1/0x10f0 [ 61.968906][ T5055] ? netdev_core_pick_tx+0x370/0x370 [ 61.974269][ T5055] ? skb_partial_csum_set+0x202/0x390 [ 61.979676][ T5055] ? virtio_net_hdr_to_skb.constprop.0+0x4ed/0x1300 [ 61.986314][ T5055] ? packet_create+0x8e0/0x8e0 [ 61.991131][ T5055] packet_xmit+0x237/0x350 [ 61.995591][ T5055] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 62.001502][ T5055] packet_sendmsg+0x24a6/0x51e0 [ 62.006399][ T5055] ? preempt_count_sub+0x160/0x160 [ 62.011558][ T5055] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 62.017538][ T5055] ? aa_sk_perm+0x2f8/0xb40 [ 62.022063][ T5055] ? packet_notifier+0x8c0/0x8c0 [ 62.027039][ T5055] ? aa_af_perm+0x250/0x250 [ 62.031649][ T5055] ? import_ubuf+0x1a4/0x200 [ 62.036292][ T5055] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 62.041600][ T5055] ? packet_notifier+0x8c0/0x8c0 [ 62.046573][ T5055] __sock_sendmsg+0xd5/0x180 [ 62.051201][ T5055] ____sys_sendmsg+0x6ac/0x940 [ 62.055993][ T5055] ? copy_msghdr_from_user+0x10b/0x160 [ 62.061476][ T5055] ? kernel_sendmsg+0x50/0x50 [ 62.066205][ T5055] ___sys_sendmsg+0x135/0x1d0 [ 62.070895][ T5055] ? do_recvmmsg+0x740/0x740 [ 62.075552][ T5055] ? lock_sync+0x190/0x190 [ 62.079990][ T5055] ? ptrace_stop.part.0+0x457/0x950 [ 62.085255][ T5055] ? __fget_light+0x173/0x200 [ 62.089962][ T5055] __sys_sendmsg+0x117/0x1e0 [ 62.094619][ T5055] ? __sys_sendmsg_sock+0x30/0x30 [ 62.099658][ T5055] ? ptrace_notify+0xf4/0x130 [ 62.104380][ T5055] ? lockdep_hardirqs_on+0x7d/0x110 [ 62.109591][ T5055] ? _raw_spin_unlock_irq+0x2e/0x50 [ 62.114828][ T5055] ? ptrace_notify+0xf4/0x130 [ 62.119514][ T5055] do_syscall_64+0xd3/0x250 [ 62.124061][ T5055] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 62.129974][ T5055] RIP: 0033:0x7f12595524d9 [ 62.134446][ T5055] 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 [ 62.154133][ T5055] RSP: 002b:00007fffd3573ad8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.162533][ T5055] RAX: ffffffffffffffda RBX: 00007f125959f390 RCX: 00007f12595524d9 [ 62.170550][ T5055] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 62.178571][ T5055] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 62.186929][ T5055] R10: 0000000000000004 R11: 0000000000000246 R12: 00007fffd3573b20 [ 62.194934][ T5055] R13: 00007fffd3573af0 R14: 0000000000000001 R15: 00007fffd3573b20 [ 62.202901][ T5055] [ 62.205978][ T5055] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 62.213259][ T5055] CPU: 0 PID: 5055 Comm: syz-executor123 Not tainted 6.8.0-rc1-syzkaller-00311-g3a5879d495b2 #0 [ 62.223671][ T5055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 62.233723][ T5055] Call Trace: [ 62.237108][ T5055] [ 62.240032][ T5055] dump_stack_lvl+0xd9/0x1b0 [ 62.244626][ T5055] panic+0x6dc/0x790 [ 62.248657][ T5055] ? panic_smp_self_stop+0xa0/0xa0 [ 62.253771][ T5055] ? show_trace_log_lvl+0x363/0x4f0 [ 62.258975][ T5055] ? check_panic_on_warn+0x1f/0xb0 [ 62.264091][ T5055] ? skb_checksum_help+0x52e/0x740 [ 62.269208][ T5055] check_panic_on_warn+0xab/0xb0 [ 62.274148][ T5055] __warn+0xf2/0x390 [ 62.278044][ T5055] ? skb_checksum_help+0x52e/0x740 [ 62.283157][ T5055] report_bug+0x3bc/0x580 [ 62.287488][ T5055] handle_bug+0x3d/0x70 [ 62.291644][ T5055] exc_invalid_op+0x17/0x40 [ 62.296146][ T5055] asm_exc_invalid_op+0x1a/0x20 [ 62.300992][ T5055] RIP: 0010:skb_checksum_help+0x52e/0x740 [ 62.306719][ T5055] Code: 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 00 02 00 00 44 89 e2 2b 53 74 44 89 ee 48 c7 c7 c0 95 ea 8b e8 93 86 d2 f8 90 <0f> 0b 90 90 e9 42 ff ff ff e8 e4 92 0c f9 44 0f b6 25 b7 7c a9 06 [ 62.326331][ T5055] RSP: 0018:ffffc900042b7088 EFLAGS: 00010286 [ 62.332396][ T5055] RAX: 0000000000000000 RBX: ffff88802d135dc0 RCX: ffffffff814e18f9 [ 62.340368][ T5055] RDX: ffff888023860000 RSI: ffffffff814e1906 RDI: 0000000000000001 [ 62.348346][ T5055] RBP: ffff88802d135e34 R08: 0000000000000001 R09: 0000000000000000 [ 62.356311][ T5055] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000002969 [ 62.364281][ T5055] R13: 0000000000000529 R14: ffff88802d135e30 R15: 00000000000005d1 [ 62.372255][ T5055] ? __warn_printk+0x199/0x350 [ 62.377030][ T5055] ? __warn_printk+0x1a6/0x350 [ 62.381802][ T5055] ? skb_checksum_help+0x52d/0x740 [ 62.386919][ T5055] ip_do_fragment+0xa15/0x18a0 [ 62.391702][ T5055] ? ip_fragment.constprop.0+0x230/0x230 [ 62.397350][ T5055] ? ip_skb_dst_mtu+0xc60/0xc60 [ 62.402202][ T5055] ? kfree_skbmem+0xef/0x1b0 [ 62.406789][ T5055] ? __kasan_slab_free+0x12c/0x1b0 [ 62.411897][ T5055] ? kmem_cache_free+0x129/0x350 [ 62.416840][ T5055] ? skb_release_data+0x5bf/0x870 [ 62.422207][ T5055] ? kfree_skbmem+0xef/0x1b0 [ 62.426805][ T5055] ip_fragment.constprop.0+0x161/0x230 [ 62.432266][ T5055] __ip_finish_output+0x49c/0x650 [ 62.437297][ T5055] ip_finish_output+0x31/0x310 [ 62.442061][ T5055] ip_mc_output+0x1dd/0x6a0 [ 62.446560][ T5055] ? __get_random_u32_below+0x4e/0xa0 [ 62.451930][ T5055] ip_local_out+0xaf/0x1a0 [ 62.456345][ T5055] iptunnel_xmit+0x5b4/0x9b0 [ 62.460943][ T5055] ip_tunnel_xmit+0x1daa/0x33b0 [ 62.465810][ T5055] ? reacquire_held_locks+0x410/0x4c0 [ 62.471183][ T5055] ? ip_md_tunnel_xmit+0x1ff0/0x1ff0 [ 62.476485][ T5055] ? __gre_xmit+0x4f5/0x980 [ 62.480991][ T5055] ipgre_xmit+0x49b/0x980 [ 62.485325][ T5055] dev_hard_start_xmit+0x137/0x6d0 [ 62.490447][ T5055] __dev_queue_xmit+0x7b6/0x3ed0 [ 62.495387][ T5055] ? _copy_from_iter+0x2c1/0x10f0 [ 62.500407][ T5055] ? netdev_core_pick_tx+0x370/0x370 [ 62.505686][ T5055] ? skb_partial_csum_set+0x202/0x390 [ 62.511063][ T5055] ? virtio_net_hdr_to_skb.constprop.0+0x4ed/0x1300 [ 62.517653][ T5055] ? packet_create+0x8e0/0x8e0 [ 62.522421][ T5055] packet_xmit+0x237/0x350 [ 62.526834][ T5055] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 62.532730][ T5055] packet_sendmsg+0x24a6/0x51e0 [ 62.537584][ T5055] ? preempt_count_sub+0x160/0x160 [ 62.542691][ T5055] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 62.548687][ T5055] ? aa_sk_perm+0x2f8/0xb40 [ 62.553626][ T5055] ? packet_notifier+0x8c0/0x8c0 [ 62.558556][ T5055] ? aa_af_perm+0x250/0x250 [ 62.563055][ T5055] ? import_ubuf+0x1a4/0x200 [ 62.567647][ T5055] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 62.572929][ T5055] ? packet_notifier+0x8c0/0x8c0 [ 62.577862][ T5055] __sock_sendmsg+0xd5/0x180 [ 62.582456][ T5055] ____sys_sendmsg+0x6ac/0x940 [ 62.587210][ T5055] ? copy_msghdr_from_user+0x10b/0x160 [ 62.592663][ T5055] ? kernel_sendmsg+0x50/0x50 [ 62.597367][ T5055] ___sys_sendmsg+0x135/0x1d0 [ 62.602065][ T5055] ? do_recvmmsg+0x740/0x740 [ 62.606686][ T5055] ? lock_sync+0x190/0x190 [ 62.611111][ T5055] ? ptrace_stop.part.0+0x457/0x950 [ 62.616322][ T5055] ? __fget_light+0x173/0x200 [ 62.621002][ T5055] __sys_sendmsg+0x117/0x1e0 [ 62.625590][ T5055] ? __sys_sendmsg_sock+0x30/0x30 [ 62.630608][ T5055] ? ptrace_notify+0xf4/0x130 [ 62.635288][ T5055] ? lockdep_hardirqs_on+0x7d/0x110 [ 62.640479][ T5055] ? _raw_spin_unlock_irq+0x2e/0x50 [ 62.645845][ T5055] ? ptrace_notify+0xf4/0x130 [ 62.650523][ T5055] do_syscall_64+0xd3/0x250 [ 62.655032][ T5055] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 62.660923][ T5055] RIP: 0033:0x7f12595524d9 [ 62.665365][ T5055] 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 [ 62.684972][ T5055] RSP: 002b:00007fffd3573ad8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 62.693381][ T5055] RAX: ffffffffffffffda RBX: 00007f125959f390 RCX: 00007f12595524d9 [ 62.701351][ T5055] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 62.709319][ T5055] RBP: 0000000000000003 R08: 0000555500000000 R09: 0000555500000000 [ 62.717284][ T5055] R10: 0000000000000004 R11: 0000000000000246 R12: 00007fffd3573b20 [ 62.725266][ T5055] R13: 00007fffd3573af0 R14: 0000000000000001 R15: 00007fffd3573b20 [ 62.733254][ T5055] [ 62.736534][ T5055] Kernel Offset: disabled [ 62.740923][ T5055] Rebooting in 86400 seconds..