ci-upstream-bpf-next-kasan-gce/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci-upstream-bpf-next-kasan-gce/syz-executor2727384558 <...> Warning: Permanently added '10.128.0.142' (ED25519) to the list of known hosts. execve("ci-upstream-bpf-next-kasan-gce/syz-executor2727384558", ["ci-upstream-bpf-next-kasan-gce/syz-executor2727384558"], 0x7ffe6b8f3bd0 /* 10 vars */) = 0 brk(NULL) = 0x55557372c000 brk(0x55557372cd80) = 0x55557372cd80 arch_prctl(ARCH_SET_FS, 0x55557372c400) = 0 set_tid_address(0x55557372c6d0) = 5632 set_robust_list(0x55557372c6e0, 24) = 0 rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 33, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci-upstream-bpf-next-kasan-gce/syz-executor2727384558", 4096) = 59 getrandom("\xc0\x74\xa2\xa0\xf7\xa9\xc4\xa5", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557372cd80 brk(0x55557374dd80) = 0x55557374dd80 brk(0x55557374e000) = 0x55557374e000 mprotect(0x7f21bcaa3000, 20480, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18) = 18 executing program socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER) = 3 sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=144, nlmsg_type=0x100 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|0x600, nlmsg_seq=0, nlmsg_pid=0}, "\x02\x00\x00\x00\x34\x00\x01\x80\x14\x00\x01\x80\x08\x00\x01\x00\x01\x02\x03\x04\x08\x00\x02\x00\x05\x06\x07\x08\x1c\x00\x02\x80\x05\x00\x01\x00\x06\x00\x00\x00\x06\x00\x02\x00\x04\xd2\x00\x00\x06\x00\x03\x00\x00\x15\x00\x00\x34\x00\x02\x80\x14\x00\x01\x80\x08\x00\x01\x00\x05\x06\x07\x08\x08\x00\x02\x00\x01\x02\x03\x04\x1c\x00\x02\x80\x05\x00\x01\x00\x06\x00\x00\x00\x06\x00\x02\x00\x00\x15\x00\x00"...], iov_len=144}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 144 sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=200, nlmsg_type=NFNL_SUBSYS_CTNETLINK_EXP<<8|IPCTNL_MSG_EXP_NEW, nlmsg_flags=NLM_F_REQUEST|NLM_F_EXCL|NLM_F_CREATE, nlmsg_seq=0, nlmsg_pid=0}, {nfgen_family=AF_INET, version=NFNETLINK_V0, res_id=htons(0)}, [[{nla_len=52, nla_type=NLA_F_NESTED|0x1}, "\x14\x00\x01\x80\x08\x00\x01\x00\x01\x02\x03\x04\x08\x00\x02\x00\x05\x06\x07\x08\x1c\x00\x02\x80\x05\x00\x01\x00\x06\x00\x00\x00\x06\x00\x02\x00\x04\xd2\x00\x00\x06\x00\x03\x00\x00\x15\x00\x00"], [{nla_len=52, nla_type=NLA_F_NESTED|0x2}, "\x14\x00\x01\x80\x08\x00\x01\x00\x05\x06\x07\x08\x08\x00\x02\x00\x01\x02\x03\x04\x1c\x00\x02\x80\x05\x00\x01\x00\x06\x00\x00\x00\x06\x00\x02\x00\x00\x14\x00\x00\x06\x00\x03\x00\x9c\x40\x00\x00"], [{nla_len=52, nla_type=NLA_F_NESTED|0x3}, "\x14\x00\x01\x80\x08\x00\x01\x00\xff\xff\xff\xff\x08\x00\x02\x00\xff\xff\xff\xff\x1c\x00\x02\x80\x05\x00\x01\x00\xff\x00\x00\x00\x06\x00\x02\x00\x00\x00\x00\x00\x06\x00\x03\x00\xff\xff\x00\x00"], [{nla_len=22, nla_type=0xb}, "\x6e\x61\x74\x2d\x66\x6f\x6c\x6c\x6f\x77\x2d\x6d\x61\x73\x74\x65\x72\x00"]]], iov_len=200}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 200 socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER) = 4 [ 77.422902][ T5632] [ 77.425684][ T5632] ============================= [ 77.430528][ T5632] WARNING: suspicious RCU usage [ 77.435417][ T5632] syzkaller #0 Not tainted [ 77.439849][ T5632] ----------------------------- [ 77.444730][ T5632] net/netfilter/nf_conntrack_netlink.c:3393 suspicious rcu_dereference_check() usage! [ 77.454286][ T5632] [ 77.454286][ T5632] other info that might help us debug this: [ 77.454286][ T5632] [ 77.464564][ T5632] [ 77.464564][ T5632] rcu_scheduler_active = 2, debug_locks = 1 [ 77.472627][ T5632] locks held by syz-executor272/5632: 2, last CPU#0: [ 77.479399][ T5632] #0: ffffffff9aee52e0 (nfnl_subsys_ctnetlink_exp){+.+.}-{4:4}, at: nfnetlink_rcv_msg+0xa69/0x12b0 [ 77.490281][ T5632] #1: ffffffff8ea74d58 (nf_conntrack_expect_lock){+...}-{3:3}, at: nf_ct_expect_iterate_net+0x38/0x180 [ 77.501515][ T5632] [ 77.501515][ T5632] stack backtrace: [ 77.507466][ T5632] CPU: 0 UID: 0 PID: 5632 Comm: syz-executor272 Not tainted syzkaller #0 PREEMPT(full) [ 77.517186][ T5632] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 77.527247][ T5632] Call Trace: [ 77.530518][ T5632] [ 77.533454][ T5632] dump_stack_lvl+0xe8/0x150 [ 77.538033][ T5632] lockdep_rcu_suspicious+0x140/0x1d0 [ 77.543392][ T5632] expect_iter_name+0xfb/0x100 [ 77.548140][ T5632] nf_ct_expect_iterate_net+0xf2/0x180 [ 77.553589][ T5632] ? __pfx_expect_iter_name+0x10/0x10 [ 77.558963][ T5632] ctnetlink_del_expect+0x45d/0x640 [ 77.564143][ T5632] ? __pfx_ctnetlink_del_expect+0x10/0x10 [ 77.569843][ T5632] ? __pfx_ctnetlink_del_expect+0x10/0x10 [ 77.575549][ T5632] nfnetlink_rcv_msg+0xcc2/0x12b0 [ 77.580557][ T5632] ? is_bpf_text_address+0x292/0x2b0 [ 77.585826][ T5632] ? nfnetlink_rcv_msg+0x228/0x12b0 [ 77.591014][ T5632] ? __pfx_nfnetlink_rcv_msg+0x10/0x10 [ 77.596493][ T5632] netlink_rcv_skb+0x226/0x4a0 [ 77.601239][ T5632] ? __pfx_nfnetlink_rcv_msg+0x10/0x10 [ 77.606686][ T5632] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 77.611961][ T5632] ? bpf_lsm_capable+0x9/0x20 [ 77.616624][ T5632] ? security_capable+0x7e/0x2c0 [ 77.621590][ T5632] nfnetlink_rcv+0x2b9/0x28c0 [ 77.626282][ T5632] ? kernel_text_address+0xa5/0xe0 [ 77.631397][ T5632] ? __kernel_text_address+0xd/0x30 [ 77.636595][ T5632] ? unwind_get_return_address+0x4d/0x90 [ 77.642232][ T5632] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 77.648374][ T5632] ? arch_stack_walk+0xfb/0x150 [ 77.653237][ T5632] ? stack_trace_save+0xa9/0x100 [ 77.658164][ T5632] ? __lock_acquire+0x747/0x2de0 [ 77.663091][ T5632] ? __pfx_nfnetlink_rcv+0x10/0x10 [ 77.668291][ T5632] ? __kasan_slab_alloc+0x6c/0x80 [ 77.673308][ T5632] ? kmem_cache_alloc_node_noprof+0x354/0x610 [ 77.679377][ T5632] ? __alloc_skb+0x27a/0x7a0 [ 77.683984][ T5632] ? netlink_sendmsg+0x5d4/0xb40 [ 77.688920][ T5632] ? sock_sendmsg_nosec+0x13a/0x180 [ 77.694127][ T5632] ? ____sys_sendmsg+0x54e/0x850 [ 77.699072][ T5632] ? __lock_acquire+0x747/0x2de0 [ 77.704013][ T5632] ? __netlink_lookup+0xc6/0x8b0 [ 77.708959][ T5632] ? lock_acquire+0x115/0x350 [ 77.713636][ T5632] ? netlink_deliver_tap+0x2e/0x1b0 [ 77.718839][ T5632] ? netlink_deliver_tap+0x2e/0x1b0 [ 77.724036][ T5632] ? netlink_deliver_tap+0x2e/0x1b0 [ 77.729230][ T5632] netlink_unicast+0x7bd/0x940 [ 77.734001][ T5632] netlink_sendmsg+0x813/0xb40 [ 77.738779][ T5632] ? __pfx_netlink_sendmsg+0x10/0x10 [ 77.744112][ T5632] ? apparmor_socket_sendmsg+0x18b/0x360 [ 77.749757][ T5632] ? rcu_is_watching+0x16/0xb0 [ 77.754530][ T5632] ? __pfx_netlink_sendmsg+0x10/0x10 [ 77.759821][ T5632] sock_sendmsg_nosec+0x13a/0x180 [ 77.764856][ T5632] ____sys_sendmsg+0x54e/0x850 [ 77.769629][ T5632] ? __pfx_____sys_sendmsg+0x10/0x10 [ 77.774936][ T5632] ? import_iovec+0x73/0xa0 [ 77.779448][ T5632] ___sys_sendmsg+0x2a5/0x360 [ 77.784126][ T5632] ? __lock_acquire+0x747/0x2de0 [ 77.789060][ T5632] ? __pfx____sys_sendmsg+0x10/0x10 [ 77.794294][ T5632] __x64_sys_sendmsg+0x1b1/0x290 [ 77.799229][ T5632] ? _raw_spin_unlock_irq+0x2e/0x50 [ 77.804440][ T5632] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 77.809927][ T5632] do_syscall_64+0x166/0x520 [ 77.814522][ T5632] ? trace_irq_disable+0x3b/0x140 [ 77.819547][ T5632] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.825615][ T5632] ? clear_bhb_loop+0x70/0xc0 [ 77.830292][ T5632] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.836178][ T5632] RIP: 0033:0x7f21bca12e79 [ 77.840603][ T5632] Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 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 d8 ff ff ff f7 d8 64 89 01 48 [ 77.860198][ T5632] RSP: 002b:00007fffa6fa9ff8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e sendmsg(4, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=280, nlmsg_type=0x202 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x07\x00\x00\x07\x68\x00\x01\x80\x06\x00\x03\x40\x00\x04\x00\x00\x2c\x00\x01\x80\x14\x00\x03\x00\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x14\x00\x04\x00\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x0c\x00\x02\x80\x05\x00\x01\x00\xbd\x00\x00\x00\x0c\x00\x02\x80\x05\x00\x01\x00\x21\x00\x00\x00\x0c\x00\x02\x80\x05\x00\x01\x00\x84\x00\x00\x00\x0c\x00\x02\x80"...], iov_len=280}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_EOR}, MSG_EOR|MSG_FASTOPEN) = 280 exit_group(0) = ? +++ exited with 0 +++ [ 77.868610][ T5632] RAX: ffffffffffffffda RBX: 00007fffa6faa128 RCX: