audit: type=1400 audit(1568113790.224:40): avc:  denied  { setopt } for  pid=6990 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6995 Comm: syz-executor.0 Not tainted 4.14.143 #0
kobject: 'loop4' (ffff8880a4aa29a0): kobject_uevent_env
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880652b42c0 task.stack: ffff8880652b8000
RIP: 0010:tcp_sendmsg_locked+0x50e/0x3200 net/ipv4/tcp.c:1281
RSP: 0018:ffff8880652bf9b0 EFLAGS: 00010206
kobject: 'loop4' (ffff8880a4aa29a0): fill_kobj_path: path = '/devices/virtual/block/loop4'
RAX: 0000000000000012 RBX: 0000000000000000 RCX: ffffc90005e2d000
RDX: 000000000000011c RSI: ffffffff85240c94 RDI: 0000000000000090
RBP: ffff8880652bfb48 R08: ffff8880652b42c0 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8880652b42c0 R12: dffffc0000000000
kobject: 'loop0' (ffff8880a492ae60): kobject_uevent_env
R13: ffff888093ecf540 R14: ffff8880652bfc28 R15: ffff88806818ac00
FS:  00007f1e9f022700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000b4b340 CR3: 0000000081029000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject: 'loop0' (ffff8880a492ae60): fill_kobj_path: path = '/devices/virtual/block/loop0'
protocol 88fb is buggy, dev hsr_slave_0
 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1457
 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762
protocol 88fb is buggy, dev hsr_slave_1
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xce/0x110 net/socket.c:656
 sock_write_iter+0x21d/0x390 net/socket.c:925
kobject: 'loop0' (ffff8880a492ae60): kobject_uevent_env
 call_write_iter include/linux/fs.h:1777 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4a7/0x6b0 fs/read_write.c:482
kobject: 'loop0' (ffff8880a492ae60): fill_kobj_path: path = '/devices/virtual/block/loop0'
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xfd/0x230 fs/read_write.c:582
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
kobject: 'loop4' (ffff8880a4aa29a0): kobject_uevent_env
RIP: 0033:0x4598e9
RSP: 002b:00007f1e9f021c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9
RDX: 00000000fffffffe RSI: 0000000020000380 RDI: 0000000000000008
kobject: 'loop4' (ffff8880a4aa29a0): fill_kobj_path: path = '/devices/virtual/block/loop4'
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1e9f0226d4
R13: 00000000004c5e50 R14: 00000000004e0380 R15: 00000000ffffffff
Code: d5 
kobject: 'loop0' (ffff8880a492ae60): kobject_uevent_env
38 
kobject: 'loop0' (ffff8880a492ae60): fill_kobj_path: path = '/devices/virtual/block/loop0'
fc 4d 85 ed 0f 84 40 08 00 00 
audit: type=1400 audit(1568113790.224:41): avc:  denied  { ioctl } for  pid=6990 comm="syz-executor.0" path="socket:[26697]" dev="sockfs" ino=26697 ioctlcmd=0x89e2 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
e8 dc d5 38 fc 8b 85 78 ff ff 
kobject: 'loop5' (ffff8880a4af32a0): kobject_uevent_env
ff 48 8d bb 90 00 00 00 89 85 50 ff ff ff 48 89 f8 48 c1 e8 03 
kobject: 'loop5' (ffff8880a4af32a0): fill_kobj_path: path = '/devices/virtual/block/loop5'
<42> 0f b6 04 20 84 c0 74 06 0f 8e 4a 25 00 00 f6 83 90 00 00 00 
RIP: tcp_sendmsg_locked+0x50e/0x3200 net/ipv4/tcp.c:1281 RSP: ffff8880652bf9b0
---[ end trace b691269650153889 ]---