./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1799960903 <...> forked to background, child pid 3175 no interfaces have a carrier [ 24.789866][ T3176] 8021q: adding VLAN 0 to HW filter on device bond0 [ 24.804473][ T3176] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.233' (ECDSA) to the list of known hosts. execve("./syz-executor1799960903", ["./syz-executor1799960903"], 0x7ffdef9eb860 /* 10 vars */) = 0 brk(NULL) = 0x555555ea7000 brk(0x555555ea7c40) = 0x555555ea7c40 arch_prctl(ARCH_SET_FS, 0x555555ea7300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1799960903", 4096) = 28 brk(0x555555ec8c40) = 0x555555ec8c40 brk(0x555555ec9000) = 0x555555ec9000 mprotect(0x7fe7b8d3c000, 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 3597 attached , child_tidptr=0x555555ea75d0) = 3597 [pid 3597] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3597] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3597] setsid() = 1 [pid 3597] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3597] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3597] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3597] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3597] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3597] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3597] unshare(CLONE_NEWNS) = 0 [pid 3597] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3597] unshare(CLONE_NEWIPC) = 0 [pid 3597] unshare(CLONE_NEWCGROUP) = 0 [pid 3597] unshare(CLONE_NEWUTS) = 0 [pid 3597] unshare(CLONE_SYSVSEM) = 0 [pid 3597] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3597] write(3, "16777216", 8) = 8 [pid 3597] close(3) = 0 [pid 3597] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3597] write(3, "536870912", 9) = 9 [pid 3597] close(3) = 0 [pid 3597] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3597] write(3, "1024", 4) = 4 [pid 3597] close(3) = 0 [pid 3597] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3597] write(3, "8192", 4) = 4 [pid 3597] close(3) = 0 [pid 3597] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3597] write(3, "1024", 4) = 4 [pid 3597] close(3) = 0 [pid 3597] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3597] write(3, "1024", 4) = 4 [pid 3597] close(3) = 0 [pid 3597] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3597] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3597] close(3) = 0 [pid 3597] getpid() = 1 [pid 3597] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<qdisc_tx_busylock ?: &qdisc_tx_busylock){+...}-{2:2}, at: __dev_queue_xmit+0x12ce/0x3640 [ 51.579959][ T3597] #3: ffff88813fe0a4d8 (_xmit_ETHER#2){+.-.}-{2:2}, at: sch_direct_xmit+0x1bd/0x5e0 [ 51.589421][ T3597] #4: ffffffff8cb1b080 (rcu_read_lock_bh){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 [ 51.598965][ T3597] #5: ffffffff8cb1b080 (rcu_read_lock_bh){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 [ 51.608507][ T3597] #6: ffff88807d682258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+...}-{2:2}, at: __dev_queue_xmit+0x12ce/0x3640 [ 51.620915][ T3597] [ 51.620915][ T3597] stack backtrace: [ 51.626781][ T3597] CPU: 1 PID: 3597 Comm: syz-executor179 Not tainted 5.18.0-rc6-syzkaller-00009-gfeb9c5e19e91 #0 [ 51.637254][ T3597] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.647285][ T3597] Call Trace: [ 51.650547][ T3597] [ 51.653463][ T3597] dump_stack_lvl+0x1e3/0x2cb [ 51.658125][ T3597] ? bfq_pos_tree_add_move+0x436/0x436 [ 51.663564][ T3597] ? panic+0x76e/0x76e [ 51.667617][ T3597] ? print_tainted+0x145/0x170 [ 51.672361][ T3597] ? lockdep_print_held_locks+0x10f/0x1b0 [ 51.678062][ T3597] validate_chain+0x485d/0x65c0 [ 51.682897][ T3597] ? mark_lock+0x98/0x350 [ 51.687207][ T3597] ? reacquire_held_locks+0x680/0x680 [ 51.692559][ T3597] ? lockdep_hardirqs_on_prepare+0x448/0x7b0 [ 51.698526][ T3597] ? print_irqtrace_events+0x220/0x220 [ 51.703967][ T3597] ? reacquire_held_locks+0x680/0x680 [ 51.709330][ T3597] ? do_raw_spin_unlock+0x134/0x8a0 [ 51.714516][ T3597] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 51.720403][ T3597] ? lockdep_hardirqs_on+0x95/0x140 [ 51.725672][ T3597] ? reacquire_held_locks+0x680/0x680 [ 51.731024][ T3597] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 51.736896][ T3597] ? _raw_spin_unlock+0x40/0x40 [ 51.741728][ T3597] ? stack_trace_save+0x12d/0x1f0 [ 51.746735][ T3597] ? csum_partial+0x130/0x250 [ 51.751393][ T3597] ? __skb_checksum+0x850/0x850 [ 51.756223][ T3597] ? __skb_checksum+0x784/0x850 [ 51.761059][ T3597] ? mark_lock+0x98/0x350 [ 51.765372][ T3597] __lock_acquire+0x129a/0x1f80 [ 51.770212][ T3597] lock_acquire+0x1a7/0x400 [ 51.774693][ T3597] ? sch_direct_xmit+0x1bd/0x5e0 [ 51.779611][ T3597] ? read_lock_is_recursive+0x10/0x10 [ 51.784962][ T3597] ? validate_xmit_skb_list+0x140/0x140 [ 51.790495][ T3597] _raw_spin_lock+0x2a/0x40 [ 51.794985][ T3597] ? sch_direct_xmit+0x1bd/0x5e0 [ 51.799920][ T3597] sch_direct_xmit+0x1bd/0x5e0 [ 51.804680][ T3597] ? mrp_pdu_append_vecattr_event+0x1e10/0x1e10 [ 51.810917][ T3597] __dev_queue_xmit+0x1970/0x3640 [ 51.815936][ T3597] ? print_irqtrace_events+0x220/0x220 [ 51.821397][ T3597] ? dev_queue_xmit+0x20/0x20 [ 51.826064][ T3597] ? neigh_event_send+0x120/0x120 [ 51.831077][ T3597] ? neigh_resolve_output+0x2e4/0x6f0 [ 51.836431][ T3597] ? eth_header+0x117/0x1e0 [ 51.840916][ T3597] ? memcpy+0x3c/0x60 [ 51.844882][ T3597] ? eth_header+0x117/0x1e0 [ 51.849363][ T3597] ? llc_sysctl_exit+0x60/0x60 [ 51.854105][ T3597] ? neigh_resolve_output+0x622/0x6f0 [ 51.859459][ T3597] ip_finish_output2+0xdc8/0x11c0 [ 51.864465][ T3597] ? ip_mc_finish_output+0x510/0x510 [ 51.869743][ T3597] ? ip_fragment+0x210/0x210 [ 51.874320][ T3597] ? ip_skb_dst_mtu+0x4b1/0x8c0 [ 51.879153][ T3597] ? __ip_finish_output+0x3e8/0x4b0 [ 51.884334][ T3597] iptunnel_xmit+0x4cb/0x8d0 [ 51.888909][ T3597] ip_tunnel_xmit+0x1c3c/0x24e0 [ 51.893741][ T3597] ? ip_tunnel_xmit+0x1411/0x24e0 [ 51.898749][ T3597] ? tnl_update_pmtu+0x1090/0x1090 [ 51.903843][ T3597] ? gre_build_header+0x253/0x880 [ 51.908851][ T3597] erspan_xmit+0xbf6/0x18b0 [ 51.913351][ T3597] dev_hard_start_xmit+0x20b/0x450 [ 51.918446][ T3597] sch_direct_xmit+0x2ae/0x5e0 [ 51.923195][ T3597] ? mrp_pdu_append_vecattr_event+0x1e10/0x1e10 [ 51.929418][ T3597] __dev_queue_xmit+0x1970/0x3640 [ 51.934422][ T3597] ? print_irqtrace_events+0x220/0x220 [ 51.939866][ T3597] ? dev_queue_xmit+0x20/0x20 [ 51.944523][ T3597] ? neigh_event_send+0x120/0x120 [ 51.949525][ T3597] ? neigh_resolve_output+0x2e4/0x6f0 [ 51.954876][ T3597] ? eth_header+0x117/0x1e0 [ 51.959361][ T3597] ? memcpy+0x3c/0x60 [ 51.963327][ T3597] ? eth_header+0x117/0x1e0 [ 51.967809][ T3597] ? llc_sysctl_exit+0x60/0x60 [ 51.972551][ T3597] ? neigh_resolve_output+0x622/0x6f0 [ 51.977911][ T3597] ip_finish_output2+0xdc8/0x11c0 [ 51.982919][ T3597] ? ip_mc_finish_output+0x510/0x510 [ 51.988187][ T3597] ? ip_fragment+0x210/0x210 [ 51.992758][ T3597] ? ip_skb_dst_mtu+0x4b1/0x8c0 [ 51.997598][ T3597] ? __ip_finish_output+0x3e8/0x4b0 [ 52.002780][ T3597] ip_send_skb+0x113/0x1a0 [ 52.007182][ T3597] udp_send_skb+0x8f7/0x11e0 [ 52.011760][ T3597] udp_sendmsg+0x1d56/0x2b50 [ 52.016336][ T3597] ? ip_skb_dst_mtu+0x8c0/0x8c0 [ 52.021167][ T3597] ? udp_cmsg_send+0x350/0x350 [ 52.025922][ T3597] ? rcu_read_lock_sched_held+0x89/0x130 [ 52.031534][ T3597] ? reacquire_held_locks+0x680/0x680 [ 52.036889][ T3597] ? reacquire_held_locks+0x680/0x680 [ 52.042240][ T3597] ? validate_chain+0x126/0x65c0 [ 52.047162][ T3597] udpv6_sendmsg+0xc4a/0x3180 [ 52.051826][ T3597] ? udp_lib_checksum_complete+0x210/0x210 [ 52.057620][ T3597] ? rcu_read_lock_sched_held+0x89/0x130 [ 52.063238][ T3597] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 52.069200][ T3597] ? smack_socket_sendmsg+0x16e/0x530 [ 52.074559][ T3597] ? tomoyo_socket_bind_permission+0x360/0x360 [ 52.080694][ T3597] ? sock_rps_record_flow+0x12/0x370 [ 52.085960][ T3597] ? inet_send_prepare+0x55/0x250 [ 52.090966][ T3597] ? inet6_compat_ioctl+0x550/0x550 [ 52.096147][ T3597] ____sys_sendmsg+0x597/0x8e0 [ 52.100900][ T3597] ? __sys_sendmsg_sock+0x30/0x30 [ 52.105912][ T3597] __sys_sendmmsg+0x3d7/0x770 [ 52.110571][ T3597] ? __ia32_sys_sendmsg+0x90/0x90 [ 52.115583][ T3597] ? rcu_read_lock_sched_held+0x89/0x130 [ 52.121194][ T3597] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 52.127153][ T3597] ? __rwlock_init+0x140/0x140 [ 52.131907][ T3597] ? lockdep_hardirqs_on_prepare+0x448/0x7b0 [ 52.137870][ T3597] ? memset+0x1f/0x40 [ 52.141835][ T3597] ? print_irqtrace_events+0x220/0x220 [ 52.147277][ T3597] ? lockdep_hardirqs_on+0x95/0x140 [ 52.152462][ T3597] ? print_irqtrace_events+0x220/0x220 [ 52.157898][ T3597] ? vtime_user_exit+0x2b2/0x3e0 [ 52.162815][ T3597] ? syscall_enter_from_user_mode+0x2e/0x1a0 [ 52.168779][ T3597] __x64_sys_sendmmsg+0x9c/0xb0 [ 52.173613][ T3597] do_syscall_64+0x2b/0x70 [ 52.178013][ T3597] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 52.183891][ T3597] RIP: 0033:0x7fe7b8cc7b29 [ 52.188285][ T3597] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 [ 52.207868][ T3597] RSP: 002b:00007fffa336f958 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 52.216262][ T3597] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe7b8cc7b29 [ 52.224212][ T3597] RDX: 0000000000000001 RSI: 0000000020004d80 RDI: 0000000000000004 [ 52.232166][ T3597] RBP: 0000000000000003 R08: 00007fffa336f987 R09: 00007fffa336f987 [ 52.240202][ T3597] R10: 0000000004000000 R11: 0000000000000246 R12: 0000000000000031 [pid 3597] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=NULL, msg_iovlen=0, msg_controllen=0, msg_flags=MSG_TRUNC|MSG_DONTWAIT|MSG_EOR|MSG_WAITALL|MSG_FIN|MSG_SYN|MSG_CONFIRM|MSG_RST|MSG_ERRQUEUE|MSG_NOSIGNAL|MSG_MORE|MSG_WAITFORONE|MSG_SENDPAGE_NOTLAST|MSG_BATCH|MSG_NO_SHARED_FRAGS|MSG_ZEROCOPY|MSG_FASTOPEN|MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT|0x1bf00000}, msg_len=0}], 1, MSG_ZEROCOPY) = 1 [pid 3597] exit_group(1) = ? [ 52.248162][ T3597] R13: 00007fffa336f9e0 R14: 00007fe7b8d434a0 R15: 00007fffa336f9b2 [ 52.256134][ T3597] [pid 3597] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3597, si_uid=0, si_status=1, si_utime=0, si_stime=168} --- exit_group(0) = ? +++ exited with 0 +++ [