SELinux: unrecognized netlink message: protocol=6 nlmsg_type=0 sclass=netlink_xfrm_socket pid=4949 comm=syz-executor.6 netlink: 5352 bytes leftover after parsing attributes in process `syz-executor.6'. ============================= WARNING: suspicious RCU usage 5.10.123 #1 Not tainted ----------------------------- net/xfrm/xfrm_user.c:1110 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.6/4951: #0: ffff888045a14510 (&net->xfrm.xfrm_cfg_mutex){+.+.}-{3:3}, at: xfrm_netlink_rcv+0x5c/0x90 net/xfrm/xfrm_user.c:2878 stack backtrace: CPU: 1 PID: 4951 Comm: syz-executor.6 Not tainted 5.10.123 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 xfrm_nlmsg_multicast net/xfrm/xfrm_user.c:1110 [inline] xfrm_notify_userpolicy net/xfrm/xfrm_user.c:1941 [inline] xfrm_set_default+0x642/0x740 net/xfrm/xfrm_user.c:1967 xfrm_user_rcv_msg+0x412/0x830 net/xfrm/xfrm_user.c:2857 netlink_rcv_skb+0x14b/0x430 net/netlink/af_netlink.c:2515 xfrm_netlink_rcv+0x6b/0x90 net/xfrm/xfrm_user.c:2879 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x53a/0x7e0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x901/0xdf0 net/netlink/af_netlink.c:1934 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0x150/0x190 net/socket.c:671 ____sys_sendmsg+0x709/0x870 net/socket.c:2342 ___sys_sendmsg+0xf3/0x170 net/socket.c:2396 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2429 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f5aedb12b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5aeb046188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f5aedc260e0 RCX: 00007f5aedb12b19 RDX: 0000000020000000 RSI: 00000000200002c0 RDI: 0000000000000003 RBP: 00007f5aedb6cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb7a7709f R14: 00007f5aeb046300 R15: 0000000000022000 Process accounting resumed