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-executor1225927595 <...> Warning: Permanently added '10.128.0.143' (ED25519) to the list of known hosts. execve("ci-upstream-bpf-next-kasan-gce/syz-executor1225927595", ["ci-upstream-bpf-next-kasan-gce/syz-executor1225927595"], 0x7ffe4960efe0 /* 10 vars */) = 0 brk(NULL) = 0x55555950d000 brk(0x55555950dd80) = 0x55555950dd80 arch_prctl(ARCH_SET_FS, 0x55555950d400) = 0 set_tid_address(0x55555950d6d0) = 5630 set_robust_list(0x55555950d6e0, 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-executor1225927595", 4096) = 59 getrandom("\xf5\x45\xd9\x24\x29\xb2\x85\x3e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555950dd80 brk(0x55555952ed80) = 0x55555952ed80 brk(0x55555952f000) = 0x55555952f000 mprotect(0x7f93e6cdb000, 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 [ 84.966322][ T5630] [ 84.968982][ T5630] ============================= [ 84.973857][ T5630] WARNING: suspicious RCU usage [ 84.978716][ T5630] syzkaller #0 Not tainted [ 84.983199][ T5630] ----------------------------- [ 84.988067][ T5630] net/netfilter/nf_conntrack_netlink.c:3393 suspicious rcu_dereference_check() usage! [ 84.997681][ T5630] [ 84.997681][ T5630] other info that might help us debug this: [ 84.997681][ T5630] [ 85.007987][ T5630] [ 85.007987][ T5630] rcu_scheduler_active = 2, debug_locks = 1 [ 85.016146][ T5630] locks held by syz-executor122/5630: 2, last CPU#0: [ 85.022907][ T5630] #0: ffffffff9aee6320 (nfnl_subsys_ctnetlink_exp){+.+.}-{4:4}, at: nfnetlink_rcv_msg+0xa69/0x12b0 [ 85.033833][ T5630] #1: ffffffff8ea74d58 (nf_conntrack_expect_lock){+...}-{3:3}, at: nf_ct_expect_iterate_net+0x38/0x180 [ 85.045101][ T5630] [ 85.045101][ T5630] stack backtrace: [ 85.051116][ T5630] CPU: 0 UID: 0 PID: 5630 Comm: syz-executor122 Not tainted syzkaller #0 PREEMPT(full) [ 85.060854][ T5630] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 85.070920][ T5630] Call Trace: [ 85.074204][ T5630] [ 85.077137][ T5630] dump_stack_lvl+0xe8/0x150 [ 85.081744][ T5630] lockdep_rcu_suspicious+0x140/0x1d0 [ 85.087134][ T5630] expect_iter_name+0xfb/0x100 [ 85.091910][ T5630] nf_ct_expect_iterate_net+0xf2/0x180 [ 85.097388][ T5630] ? __pfx_expect_iter_name+0x10/0x10 [ 85.102782][ T5630] ctnetlink_del_expect+0x45d/0x640 [ 85.108012][ T5630] ? __pfx_ctnetlink_del_expect+0x10/0x10 [ 85.113765][ T5630] nfnetlink_rcv_msg+0xcc2/0x12b0 [ 85.118805][ T5630] ? is_bpf_text_address+0x292/0x2b0 [ 85.124104][ T5630] ? nfnetlink_rcv_msg+0x228/0x12b0 [ 85.129330][ T5630] ? __pfx_nfnetlink_rcv_msg+0x10/0x10 [ 85.134834][ T5630] netlink_rcv_skb+0x226/0x4a0 [ 85.139609][ T5630] ? __pfx_nfnetlink_rcv_msg+0x10/0x10 [ 85.145076][ T5630] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 85.150388][ T5630] ? bpf_lsm_capable+0x9/0x20 [ 85.155068][ T5630] ? security_capable+0x7e/0x2c0 [ 85.160034][ T5630] nfnetlink_rcv+0x2b9/0x28c0 [ 85.164739][ T5630] ? kernel_text_address+0xa5/0xe0 [ 85.169855][ T5630] ? __kernel_text_address+0xd/0x30 [ 85.175078][ T5630] ? unwind_get_return_address+0x4d/0x90 [ 85.180756][ T5630] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 85.186925][ T5630] ? arch_stack_walk+0xfb/0x150 [ 85.191786][ T5630] ? stack_trace_save+0xa9/0x100 [ 85.196729][ T5630] ? __lock_acquire+0x747/0x2de0 [ 85.201682][ T5630] ? __pfx_nfnetlink_rcv+0x10/0x10 [ 85.206831][ T5630] ? __kasan_slab_alloc+0x6c/0x80 [ 85.211858][ T5630] ? kmem_cache_alloc_node_noprof+0x354/0x610 [ 85.217924][ T5630] ? __alloc_skb+0x27a/0x7a0 [ 85.222514][ T5630] ? netlink_sendmsg+0x5d4/0xb40 [ 85.227473][ T5630] ? sock_sendmsg_nosec+0x13a/0x180 [ 85.232680][ T5630] ? ____sys_sendmsg+0x54e/0x850 [ 85.237629][ T5630] ? __lock_acquire+0x747/0x2de0 [ 85.242594][ T5630] ? __netlink_lookup+0xc6/0x8b0 [ 85.247547][ T5630] ? lock_acquire+0x115/0x350 [ 85.252241][ T5630] ? netlink_deliver_tap+0x2e/0x1b0 [ 85.257449][ T5630] ? netlink_deliver_tap+0x2e/0x1b0 [ 85.262675][ T5630] ? netlink_deliver_tap+0x2e/0x1b0 [ 85.267883][ T5630] netlink_unicast+0x7bd/0x940 [ 85.272659][ T5630] netlink_sendmsg+0x813/0xb40 [ 85.277437][ T5630] ? __pfx_netlink_sendmsg+0x10/0x10 [ 85.282737][ T5630] ? apparmor_socket_sendmsg+0x98/0x360 [ 85.288279][ T5630] ? rcu_is_watching+0x16/0xb0 [ 85.293051][ T5630] ? __pfx_netlink_sendmsg+0x10/0x10 [ 85.298352][ T5630] sock_sendmsg_nosec+0x13a/0x180 [ 85.303388][ T5630] ____sys_sendmsg+0x54e/0x850 [ 85.308161][ T5630] ? __pfx_____sys_sendmsg+0x10/0x10 [ 85.313459][ T5630] ? import_iovec+0x73/0xa0 [ 85.317969][ T5630] ___sys_sendmsg+0x2a5/0x360 [ 85.322650][ T5630] ? __lock_acquire+0x747/0x2de0 [ 85.327588][ T5630] ? __pfx____sys_sendmsg+0x10/0x10 [ 85.332831][ T5630] __x64_sys_sendmsg+0x1b1/0x290 [ 85.337777][ T5630] ? _raw_spin_unlock_irq+0x2e/0x50 [ 85.342994][ T5630] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 85.348480][ T5630] do_syscall_64+0x166/0x520 [ 85.353072][ T5630] ? trace_irq_disable+0x3b/0x140 [ 85.358103][ T5630] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.364170][ T5630] ? clear_bhb_loop+0x70/0xc0 [ 85.368848][ T5630] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.374736][ T5630] RIP: 0033:0x7f93e6c4aef9 [ 85.379162][ T5630] 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 [ 85.398762][ T5630] RSP: 002b:00007fff1a4ed588 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 85.407179][ T5630] RAX: ffffffffffffffda RBX: 00007fff1a4ed6b8 RCX: 00007f93e6c4aef9 sendmsg(4, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=[{nlmsg_len=32, nlmsg_type=0x202 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|0x800, nlmsg_seq=0, nlmsg_pid=0}, "\x05\x00\x00\x04\x0a\x00\x06\x00\x51\x2e\x39\x33\x31\x00\x00\x00"], iov_len=32}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_PROBE|MSG_ZEROCOPY}, 0) = 32 exit_group(0) = ? +++ exited with 0 +++ [ 85.415149][ T5630] RDX: 00000000000