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: 9124 Comm: syz-executor.2 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a44f6140 task.stack: ffff8880498d8000
RIP: 0010:tcp_splice_read+0x123/0x950 net/ipv4/tcp.c:779
RSP: 0018:ffff8880498dfc40 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1101489ed47
RDX: 000000000000000f RSI: ffff8880a44f6a18 RDI: 0000000000000078
RBP: ffff8880a4d9a000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880498dfea8
R13: 0000000000000000 R14: ffff8880a5296d00 R15: 0000000000000000
FS:  00007f8600cf5700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000016a9e60 CR3: 000000009484d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smc_splice_read+0x16c/0x1c0 net/smc/af_smc.c:1304
 sock_splice_read+0xa6/0xe0 net/socket.c:883
 do_splice_to+0xfb/0x140 fs/splice.c:880
 do_splice fs/splice.c:1173 [inline]
 SYSC_splice fs/splice.c:1402 [inline]
 SyS_splice+0x104a/0x1380 fs/splice.c:1382
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45de29
RSP: 002b:00007f8600cf4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000000350c0 RCX: 000000000045de29
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 000000000118bf78 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffecc0ab07f R14: 00007f8600cf59c0 R15: 000000000118bf2c
Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c9 07 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 18 48 8d 7b 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e db 06 00 00 45 31 e4 f6 43 
RIP: tcp_splice_read+0x123/0x950 net/ipv4/tcp.c:779 RSP: ffff8880498dfc40
audit: type=1804 audit(1602080219.508:9): pid=9139 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir221763460/syzkaller.TOaFvQ/90/file1/file0" dev="loop0" ino=3 res=1
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