./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4049795383 <...> DUID 00:04:5a:7a:52:ad:4b:e5:ff:c1:d1:3d:bd:97:7e:8a:4f:1f forked to background, child pid 4670 [ 36.286976][ T4671] 8021q: adding VLAN 0 to HW filter on device bond0 [ 36.299020][ T4671] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.42' (ECDSA) to the list of known hosts. execve("./syz-executor4049795383", ["./syz-executor4049795383"], 0x7ffcef7fa090 /* 10 vars */) = 0 brk(NULL) = 0x555556587000 brk(0x555556587c40) = 0x555556587c40 arch_prctl(ARCH_SET_FS, 0x555556587300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor4049795383", 4096) = 28 brk(0x5555565a8c40) = 0x5555565a8c40 brk(0x5555565a9000) = 0x5555565a9000 mprotect(0x7fe1e372f000, 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 5002 attached , child_tidptr=0x5555565875d0) = 5002 [pid 5002] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5002] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5002] setsid() = 1 [pid 5002] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5002] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5002] unshare(CLONE_NEWNS) = 0 [pid 5002] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5002] unshare(CLONE_NEWIPC) = 0 [pid 5002] unshare(CLONE_NEWCGROUP) = 0 [pid 5002] unshare(CLONE_NEWUTS) = 0 [pid 5002] unshare(CLONE_SYSVSEM) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "16777216", 8) = 8 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "536870912", 9) = 9 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "8192", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024", 4) = 4 [pid 5002] close(3) = 0 [pid 5002] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5002] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5002] close(3) = 0 [pid 5002] getpid() = 1 [pid 5002] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b 0f b6 1d 7a 1b 57 06 31 ff 89 de e8 0b 8c 76 f9 84 db 75 dd [ 62.942077][ T5002] RSP: 0018:ffffc900039bf120 EFLAGS: 00010293 [ 62.948319][ T5002] RAX: 0000000000000000 RBX: 000000000000061f RCX: 0000000000000000 [ 62.956492][ T5002] RDX: ffff8880215c1dc0 RSI: ffffffff880db613 RDI: 0000000000000006 [ 62.964669][ T5002] RBP: ffff88802098c3c0 R08: 0000000000000006 R09: 0000000000000621 [ 62.972744][ T5002] R10: 0000000000000519 R11: 0000000000094001 R12: ffff88802098c434 [ 62.980778][ T5002] R13: 000000000000061f R14: 0000000000000519 R15: 0000000000000621 [ 62.988808][ T5002] FS: 0000555556587300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 62.997826][ T5002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.004409][ T5002] CR2: 0000000020001000 CR3: 000000007c248000 CR4: 00000000003506f0 [ 63.012630][ T5002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.020689][ T5002] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.028815][ T5002] Call Trace: [ 63.032124][ T5002] [ 63.035111][ T5002] ? __warn+0xe6/0x390 [ 63.039218][ T5002] ? skb_checksum_help+0x4a3/0x5c0 [ 63.044374][ T5002] ? report_bug+0x2da/0x500 [ 63.048965][ T5002] ? handle_bug+0x3c/0x70 [ 63.054042][ T5002] ? exc_invalid_op+0x18/0x50 [ 63.058881][ T5002] ? asm_exc_invalid_op+0x1a/0x20 [ 63.063969][ T5002] ? skb_checksum_help+0x4a3/0x5c0 [ 63.069146][ T5002] ? skb_checksum_help+0x4a3/0x5c0 [ 63.074299][ T5002] ip_do_fragment+0x99f/0x17d0 [ 63.079116][ T5002] ? ip_fragment.constprop.0+0x240/0x240 [ 63.084907][ T5002] ? ip_frag_next+0xa50/0xa50 [ 63.089619][ T5002] ? slab_free_freelist_hook+0x8b/0x1c0 [ 63.095226][ T5002] ip_fragment.constprop.0+0x16b/0x240 [ 63.100717][ T5002] __ip_finish_output+0x4a0/0x650 [ 63.105912][ T5002] ip_finish_output+0x31/0x280 [ 63.110698][ T5002] ip_output+0x1a3/0x320 [ 63.115026][ T5002] ip_local_out+0xb3/0x1a0 [ 63.120024][ T5002] iptunnel_xmit+0x622/0xa40 [ 63.124645][ T5002] ip_tunnel_xmit+0xfc0/0x3170 [ 63.129535][ T5002] ? btf_id_cmp_func+0x88/0x90 [ 63.134441][ T5002] ? ip_md_tunnel_xmit+0x1f80/0x1f80 [ 63.139827][ T5002] ? __gre_xmit+0x4f4/0x980 [ 63.144363][ T5002] ipgre_xmit+0x6d3/0x8f0 [ 63.148817][ T5002] dev_hard_start_xmit+0x187/0x700 [ 63.153986][ T5002] __dev_queue_xmit+0x2be2/0x3b10 [ 63.159211][ T5002] ? netdev_core_pick_tx+0x390/0x390 [ 63.164537][ T5002] ? hash_and_copy_to_iter+0x1a0/0x210 [ 63.170085][ T5002] ? hash_and_copy_to_iter+0x210/0x210 [ 63.175604][ T5002] ? skb_partial_csum_set+0x203/0x390 [ 63.181081][ T5002] ? virtio_net_hdr_to_skb.constprop.0+0xa44/0x1220 [ 63.187736][ T5002] ? packet_rcv_spkt+0x620/0x620 [ 63.192752][ T5002] packet_xmit+0x260/0x390 [ 63.197459][ T5002] packet_sendmsg+0x347f/0x5030 [ 63.202352][ T5002] ? aa_sk_perm+0x31d/0xb10 [ 63.206917][ T5002] ? packet_lookup_frame.isra.0+0x1c0/0x1c0 [ 63.212858][ T5002] ? aa_af_perm+0x240/0x240 [ 63.217549][ T5002] ? copy_iovec_from_user.part.0+0xc7/0x100 [ 63.223485][ T5002] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 63.228845][ T5002] ? packet_lookup_frame.isra.0+0x1c0/0x1c0 [ 63.234768][ T5002] sock_sendmsg+0xde/0x190 [ 63.239430][ T5002] ____sys_sendmsg+0x71c/0x900 [ 63.244214][ T5002] ? copy_msghdr_from_user+0xfc/0x150 [ 63.249778][ T5002] ? kernel_sendmsg+0x50/0x50 [ 63.254587][ T5002] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 63.260663][ T5002] ___sys_sendmsg+0x110/0x1b0 [ 63.265432][ T5002] ? do_recvmmsg+0x6f0/0x6f0 [ 63.270061][ T5002] ? lock_sync+0x190/0x190 [ 63.274506][ T5002] ? ptrace_stop.part.0+0x4a3/0x8e0 [ 63.279777][ T5002] ? do_raw_spin_lock+0x124/0x2b0 [ 63.284968][ T5002] ? spin_bug+0x1c0/0x1c0 [ 63.289331][ T5002] ? _raw_spin_lock_irq+0x45/0x50 [ 63.294396][ T5002] ? __fget_light+0x20a/0x270 [ 63.299253][ T5002] __sys_sendmsg+0xf7/0x1c0 [ 63.303801][ T5002] ? __sys_sendmsg_sock+0x40/0x40 [ 63.308932][ T5002] ? lock_downgrade+0x690/0x690 [ 63.313841][ T5002] ? lockdep_hardirqs_on+0x7d/0x100 [ 63.319116][ T5002] ? _raw_spin_unlock_irq+0x2e/0x50 [ 63.324370][ T5002] ? ptrace_notify+0xfe/0x140 [ 63.329124][ T5002] do_syscall_64+0x39/0xb0 [ 63.333596][ T5002] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 63.339584][ T5002] RIP: 0033:0x7fe1e36bb559 [ 63.344047][ T5002] Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 63.363831][ T5002] RSP: 002b:00007ffdecee4858 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.372389][ T5002] RAX: ffffffffffffffda RBX: 00007ffdecee4868 RCX: 00007fe1e36bb559 [ 63.380432][ T5002] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 63.388467][ T5002] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 63.396475][ T5002] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdecee4870 [ 63.404668][ T5002] R13: 00007ffdecee4890 R14: 0000000000000000 R15: 0000000000000000 [ 63.412868][ T5002] [ 63.415964][ T5002] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 63.423254][ T5002] CPU: 0 PID: 5002 Comm: syz-executor404 Not tainted 6.4.0-rc5-syzkaller-00133-g25041a4c02c7 #0 [ 63.433675][ T5002] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 63.443725][ T5002] Call Trace: [ 63.447004][ T5002] [ 63.449942][ T5002] dump_stack_lvl+0xd9/0x150 [ 63.454709][ T5002] panic+0x686/0x730 [ 63.459557][ T5002] ? panic_smp_self_stop+0xa0/0xa0 [ 63.464675][ T5002] ? show_trace_log_lvl+0x284/0x390 [ 63.469878][ T5002] ? skb_checksum_help+0x4a3/0x5c0 [ 63.475027][ T5002] check_panic_on_warn+0xb1/0xc0 [ 63.480026][ T5002] __warn+0xf2/0x390 [ 63.483957][ T5002] ? skb_checksum_help+0x4a3/0x5c0 [ 63.489096][ T5002] report_bug+0x2da/0x500 [ 63.493663][ T5002] handle_bug+0x3c/0x70 [ 63.497917][ T5002] exc_invalid_op+0x18/0x50 [ 63.502433][ T5002] asm_exc_invalid_op+0x1a/0x20 [ 63.507303][ T5002] RIP: 0010:skb_checksum_help+0x4a3/0x5c0 [ 63.513039][ T5002] Code: 90 76 f9 0f 0b 0f b6 1d a2 1b 57 06 31 ff 89 de e8 32 8c 76 f9 84 db 0f 84 cf 00 00 00 41 bc ea ff ff ff eb ad e8 3d 90 76 f9 <0f> 0b 0f b6 1d 7a 1b 57 06 31 ff 89 de e8 0b 8c 76 f9 84 db 75 dd [ 63.532934][ T5002] RSP: 0018:ffffc900039bf120 EFLAGS: 00010293 [ 63.539065][ T5002] RAX: 0000000000000000 RBX: 000000000000061f RCX: 0000000000000000 [ 63.547050][ T5002] RDX: ffff8880215c1dc0 RSI: ffffffff880db613 RDI: 0000000000000006 [ 63.555113][ T5002] RBP: ffff88802098c3c0 R08: 0000000000000006 R09: 0000000000000621 [ 63.563095][ T5002] R10: 0000000000000519 R11: 0000000000094001 R12: ffff88802098c434 [ 63.571164][ T5002] R13: 000000000000061f R14: 0000000000000519 R15: 0000000000000621 [ 63.579152][ T5002] ? skb_checksum_help+0x4a3/0x5c0 [ 63.584293][ T5002] ip_do_fragment+0x99f/0x17d0 [ 63.589067][ T5002] ? ip_fragment.constprop.0+0x240/0x240 [ 63.594715][ T5002] ? ip_frag_next+0xa50/0xa50 [ 63.599395][ T5002] ? slab_free_freelist_hook+0x8b/0x1c0 [ 63.605059][ T5002] ip_fragment.constprop.0+0x16b/0x240 [ 63.610534][ T5002] __ip_finish_output+0x4a0/0x650 [ 63.615584][ T5002] ip_finish_output+0x31/0x280 [ 63.620355][ T5002] ip_output+0x1a3/0x320 [ 63.624636][ T5002] ip_local_out+0xb3/0x1a0 [ 63.629061][ T5002] iptunnel_xmit+0x622/0xa40 [ 63.633665][ T5002] ip_tunnel_xmit+0xfc0/0x3170 [ 63.638445][ T5002] ? btf_id_cmp_func+0x88/0x90 [ 63.643232][ T5002] ? ip_md_tunnel_xmit+0x1f80/0x1f80 [ 63.648631][ T5002] ? __gre_xmit+0x4f4/0x980 [ 63.653148][ T5002] ipgre_xmit+0x6d3/0x8f0 [ 63.657496][ T5002] dev_hard_start_xmit+0x187/0x700 [ 63.662622][ T5002] __dev_queue_xmit+0x2be2/0x3b10 [ 63.667660][ T5002] ? netdev_core_pick_tx+0x390/0x390 [ 63.672952][ T5002] ? hash_and_copy_to_iter+0x1a0/0x210 [ 63.678509][ T5002] ? hash_and_copy_to_iter+0x210/0x210 [ 63.683980][ T5002] ? skb_partial_csum_set+0x203/0x390 [ 63.689389][ T5002] ? virtio_net_hdr_to_skb.constprop.0+0xa44/0x1220 [ 63.696094][ T5002] ? packet_rcv_spkt+0x620/0x620 [ 63.701173][ T5002] packet_xmit+0x260/0x390 [ 63.705692][ T5002] packet_sendmsg+0x347f/0x5030 [ 63.710578][ T5002] ? aa_sk_perm+0x31d/0xb10 [ 63.715092][ T5002] ? packet_lookup_frame.isra.0+0x1c0/0x1c0 [ 63.721001][ T5002] ? aa_af_perm+0x240/0x240 [ 63.725524][ T5002] ? copy_iovec_from_user.part.0+0xc7/0x100 [ 63.731442][ T5002] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 63.736746][ T5002] ? packet_lookup_frame.isra.0+0x1c0/0x1c0 [ 63.742663][ T5002] sock_sendmsg+0xde/0x190 [ 63.747088][ T5002] ____sys_sendmsg+0x71c/0x900 [ 63.751879][ T5002] ? copy_msghdr_from_user+0xfc/0x150 [ 63.757267][ T5002] ? kernel_sendmsg+0x50/0x50 [ 63.761957][ T5002] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 63.768044][ T5002] ___sys_sendmsg+0x110/0x1b0 [ 63.772731][ T5002] ? do_recvmmsg+0x6f0/0x6f0 [ 63.777354][ T5002] ? lock_sync+0x190/0x190 [ 63.781972][ T5002] ? ptrace_stop.part.0+0x4a3/0x8e0 [ 63.787185][ T5002] ? do_raw_spin_lock+0x124/0x2b0 [ 63.792312][ T5002] ? spin_bug+0x1c0/0x1c0 [ 63.796658][ T5002] ? _raw_spin_lock_irq+0x45/0x50 [ 63.801705][ T5002] ? __fget_light+0x20a/0x270 [ 63.806407][ T5002] __sys_sendmsg+0xf7/0x1c0 [ 63.811010][ T5002] ? __sys_sendmsg_sock+0x40/0x40 [ 63.816047][ T5002] ? lock_downgrade+0x690/0x690 [ 63.821018][ T5002] ? lockdep_hardirqs_on+0x7d/0x100 [ 63.826240][ T5002] ? _raw_spin_unlock_irq+0x2e/0x50 [ 63.831457][ T5002] ? ptrace_notify+0xfe/0x140 [ 63.836147][ T5002] do_syscall_64+0x39/0xb0 [ 63.840587][ T5002] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 63.846585][ T5002] RIP: 0033:0x7fe1e36bb559 [ 63.851109][ T5002] Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 63.870722][ T5002] RSP: 002b:00007ffdecee4858 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 63.879672][ T5002] RAX: ffffffffffffffda RBX: 00007ffdecee4868 RCX: 00007fe1e36bb559 [ 63.887742][ T5002] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000003 [ 63.895717][ T5002] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 63.903691][ T5002] R10: 0000000000000004 R11: 0000000000000246 R12: 00007ffdecee4870 [ 63.911934][ T5002] R13: 00007ffdecee4890 R14: 0000000000000000 R15: 0000000000000000 [ 63.919988][ T5002] [ 63.923180][ T5002] Kernel Offset: disabled [ 63.927587][ T5002] Rebooting in 86400 seconds..