audit: type=1400 audit(1569223297.426:19): avc: denied { associate } for pid=4862 comm="syz-executor.5" name="bus" dev="sysfs" ino=8 scontext=system_u:object_r:restorecond_exec_t:s0 tcontext=system_u:object_r:sysfs_t:s0 tclass=filesystem permissive=1 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 4874 Comm: syz-executor.1 Not tainted 4.4.174+ #4 task: ffff8800b2960000 task.stack: ffff8801d3018000 RIP: 0010:[] [] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline] RIP: 0010:[] [] xfrm_policy_check include/net/xfrm.h:1076 [inline] RIP: 0010:[] [] xfrm6_policy_check include/net/xfrm.h:1086 [inline] RIP: 0010:[] [] udpv6_queue_rcv_skb+0x18d/0x14d0 net/ipv6/udp.c:634 RSP: 0018:ffff8801d301f7a8 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000817d000 RDX: 000000000000000c RSI: ffffffff82615684 RDI: 0000000000000060 RBP: ffff8801d301f7f0 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800b5da92c0 R13: ffff8801d989f500 R14: 0000000000000000 R15: ffff8801d989f558 FS: 00007fac35755700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc23000 CR3: 00000000b3318000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8800b2960000 ffff880000000001 ffff8800b5da9348 ffff8800b5da9348 ffff8800b5da92c0 ffff8801d989f500 dffffc0000000000 ffff8800b5da9348 0000000000000000 ffff8801d301f860 ffffffff821e5e40 ffff8800b5da96f0 Call Trace: [] sk_backlog_rcv include/net/sock.h:875 [inline] [] __release_sock net/core/sock.c:2024 [inline] [] release_sock+0x170/0x500 net/core/sock.c:2477 [] udp_sendmsg+0x1176/0x1c60 net/ipv4/udp.c:1107 [] udpv6_sendmsg+0x1e5d/0x24f0 net/ipv6/udp.c:1178 [] inet_sendmsg+0x202/0x4d0 net/ipv4/af_inet.c:755 [] sock_sendmsg_nosec net/socket.c:638 [inline] [] sock_sendmsg+0xbe/0x110 net/socket.c:648 [] SYSC_sendto net/socket.c:1678 [inline] [] SyS_sendto+0x201/0x340 net/socket.c:1646 [] entry_SYSCALL_64_fastpath+0x1e/0x9a Code: 8b 75 58 41 f6 c6 01 0f 85 d9 07 00 00 e8 6c 3f cf fe 49 83 e6 fe 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 60 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 01 0f 8e 8b 0e 00 00 41 f6 46 60 04 RIP [] __xfrm_policy_check2 include/net/xfrm.h:1070 [inline] RIP [] xfrm_policy_check include/net/xfrm.h:1076 [inline] RIP [] xfrm6_policy_check include/net/xfrm.h:1086 [inline] RIP [] udpv6_queue_rcv_skb+0x18d/0x14d0 net/ipv6/udp.c:634 RSP ---[ end trace 7b214ea5d42f830a ]---