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: 2092 Comm: syz-executor900 Not tainted 4.4.167+ #4
task: ffff8800b68faf80 task.stack: ffff8800b68d0000
RIP: 0010:[<ffffffff823f592a>]  [<ffffffff823f592a>] do_tcp_sendpages net/ipv4/tcp.c:929 [inline]
RIP: 0010:[<ffffffff823f592a>]  [<ffffffff823f592a>] tcp_sendpage+0x40a/0x17e0 net/ipv4/tcp.c:1033
RSP: 0018:ffff8800b68d7910  EFLAGS: 00010206
RAX: 000000000000000f RBX: 000000000000fd58 RCX: 1ffff1003ad382db
RDX: 0000000000000000 RSI: ffffffff823f5919 RDI: 0000000000000078
RBP: ffff8800b68d7a70 R08: ffff8800b68fb890 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff823f5520
R13: ffff8801d69c1480 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db700000(0063) knlGS:00000000f77aeb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f776cdb0 CR3: 00000000b72d1000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff82ea72e0 23b54e7df45071b9 0000000000000000 ffff8800b68fb848
 fffffbfff0634d24 ffff8800b68faf80 dffffc0000000000 0000000000000000
 ffff8801d69c1868 ffff8800b68d79c8 ffff8800b68fb840 0000000600000007
Call Trace:
 [<ffffffff824a6361>] inet_sendpage+0x221/0x510 net/ipv4/af_inet.c:772
 [<ffffffff821d1db3>] kernel_sendpage+0x93/0xf0 net/socket.c:3320
 [<ffffffff821d1e9c>] sock_sendpage+0x8c/0xc0 net/socket.c:793
 [<ffffffff8152b1c6>] pipe_to_sendpage+0x266/0x330 fs/splice.c:724
 [<ffffffff8152dfc4>] splice_from_pipe_feed fs/splice.c:776 [inline]
 [<ffffffff8152dfc4>] __splice_from_pipe+0x364/0x790 fs/splice.c:901
 [<ffffffff81531089>] splice_from_pipe+0xf9/0x170 fs/splice.c:936
 [<ffffffff8153113c>] generic_splice_sendpage+0x3c/0x50 fs/splice.c:1109
 [<ffffffff81532251>] do_splice_from fs/splice.c:1128 [inline]
 [<ffffffff81532251>] do_splice fs/splice.c:1404 [inline]
 [<ffffffff81532251>] SYSC_splice fs/splice.c:1707 [inline]
 [<ffffffff81532251>] SyS_splice+0xde1/0x1430 fs/splice.c:1690
 [<ffffffff810060fe>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff810060fe>] do_fast_syscall_32+0x31e/0xa80 arch/x86/entry/common.c:397
 [<ffffffff82717690>] sysenter_flags_fixed+0xd/0x1a
Code: ff ff ff 4c 0f 44 f0 e8 35 19 f1 fe 48 85 db 0f 84 d4 02 00 00 e8 27 19 f1 fe 49 8d 7e 78 8b 9d 58 ff ff ff 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 74 08 3c 03 0f 8e be 0f 00 00 41 2b 5e 78 
RIP  [<ffffffff823f592a>] do_tcp_sendpages net/ipv4/tcp.c:929 [inline]
RIP  [<ffffffff823f592a>] tcp_sendpage+0x40a/0x17e0 net/ipv4/tcp.c:1033
 RSP <ffff8800b68d7910>
---[ end trace d7be9c337288e171 ]---