audit: type=1800 audit(1545337044.647:30): pid=5901 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6058 Comm: syz-executor665 Not tainted 4.20.0-rc7+ #283
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcp_splice_read+0x1fd/0xf90 net/ipv4/tcp.c:799
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 18 49 8d 7d 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e5 0a 00 00 45 8b 6d 78 31 ff
RSP: 0018:ffff8881c1517a08 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8881c1517b60 RCX: 1ffff11036b7311e
RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078
RBP: ffff8881c1517b88 R08: ffff8881b5b988f0 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8881b5b98000 R12: ffff8881cd08cbc0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881c1517d08
FS:  0000000000000000(0000) GS:ffff8881dae00000(0063) knlGS:0000000009296840
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020000140 CR3: 00000001c3a49000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smc_splice_read+0x265/0x380 net/smc/af_smc.c:1852
 sock_splice_read+0xba/0x110 net/socket.c:858
 do_splice_to+0x12e/0x190 fs/splice.c:880
 do_splice+0x1014/0x1430 fs/splice.c:1178
 __do_sys_splice fs/splice.c:1419 [inline]
 __se_sys_splice fs/splice.c:1399 [inline]
 __ia32_sys_splice+0x2bf/0x320 fs/splice.c:1399
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7faea29
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffdea49c EFLAGS: 00000282 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000010009
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace a94c2138a304413e ]---
RIP: 0010:tcp_splice_read+0x1fd/0xf90 net/ipv4/tcp.c:799
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 18 49 8d 7d 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e5 0a 00 00 45 8b 6d 78 31 ff
RSP: 0018:ffff8881c1517a08 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8881c1517b60 RCX: 1ffff11036b7311e
RDX: 000000000000000f RSI: 0000000000000000 RDI: 0000000000000078
RBP: ffff8881c1517b88 R08: ffff8881b5b988f0 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8881b5b98000 R12: ffff8881cd08cbc0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881c1517d08
FS:  0000000000000000(0000) GS:ffff8881dae00000(0063) knlGS:0000000009296840
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020000140 CR3: 00000001c3a49000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400