kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
kobject: 'kvm' (ffff888219f82d10): kobject_uevent_env
Modules linked in:
CPU: 1 PID: 6908 Comm: syz-executor.4 Not tainted 4.14.143 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805dca4740 task.stack: ffff88805dca8000
RIP: 0010:tcp_mark_push net/ipv4/tcp.c:630 [inline]
RIP: 0010:tcp_push+0xe9/0x610 net/ipv4/tcp.c:694
RSP: 0018:ffff88805dcafa48 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c05e000
RDX: 0000000000000007 RSI: ffffffff85231b30 RDI: 0000000000000038
RBP: ffff88805dcafa98 R08: ffff8880617b891c R09: ffff88805dca4fe0
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880617b8080
R13: 0000000000000000 R14: ffff8880617b8914 R15: 0000000000000000
FS:  00007fe59e259700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 0000000095576000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tcp_sendmsg_locked+0x2307/0x3200 net/ipv4/tcp.c:1426
kobject: 'kvm' (ffff888219f82d10): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1457
 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xce/0x110 net/socket.c:656
 SYSC_sendto+0x206/0x310 net/socket.c:1763
 SyS_sendto+0x40/0x50 net/socket.c:1731
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4598e9
RSP: 002b:00007fe59e258c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004598e9
RDX: ffffffffffffffc1 RSI: 00000000200005c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 1201000000003618
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe59e2596d4
R13: 00000000004c7880 R14: 00000000004dd188 R15: 00000000ffffffff
Code: 00 4d 8d 84 24 9c 08 00 00 4c 89 45 b8 e8 40 c7 39 fc 48 8d 7b 38 4c 8b 45 b8 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 1e 04 00 00 48 b8 00 00 00 00 00 
RIP: tcp_mark_push net/ipv4/tcp.c:630 [inline] RSP: ffff88805dcafa48
RIP: tcp_push+0xe9/0x610 net/ipv4/tcp.c:694 RSP: ffff88805dcafa48
kobject: 'loop0' (ffff8880a49dc0e0): kobject_uevent_env
kobject: 'kvm' (ffff888219f82d10): kobject_uevent_env
kobject: 'loop0' (ffff8880a49dc0e0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (ffff888219f82d10): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'input5' (ffff88809b6bcbe0): kobject_add_internal: parent: 'input', set: 'devices'
audit: type=1400 audit(1568313278.813:40): avc:  denied  { create } for  pid=6917 comm="syz-executor.2" 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
audit: type=1400 audit(1568313278.813:41): avc:  denied  { write } for  pid=6917 comm="syz-executor.2" 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
kobject: 'input5' (ffff88809b6bcbe0): kobject_uevent_env
kobject: 'loop0' (ffff8880a49dc0e0): kobject_uevent_env
kobject: 'kvm' (ffff888219f82d10): kobject_uevent_env
kobject: 'loop0' (ffff8880a49dc0e0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (ffff888219f82d10): fill_kobj_path: path = '/devices/virtual/misc/kvm'
audit: type=1400 audit(1568313279.143:42): avc:  denied  { read } for  pid=6917 comm="syz-executor.2" 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
kobject: 'input5' (ffff88809b6bcbe0): fill_kobj_path: path = '/devices/virtual/input/input5'
kobject: 'kvm' (ffff888219f82d10): kobject_uevent_env
kobject: 'kvm' (ffff888219f82d10): fill_kobj_path: path = '/devices/virtual/misc/kvm'
---[ end trace 0d0afdbb87551a9a ]---