BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD a5502067 P4D a5502067 PUD 8ed36067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 20196 Comm: syz-executor.1 Not tainted 5.3.0-rc6-next-20190830 #75
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff88805a65f688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88806169c000 RCX: 1ffff1100c2d3894
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88809d254000
RBP: ffff88805a65f6c0 R08: ffff888063a24240 R09: ffffed100c2d3849
R10: ffffed100c2d3848 R11: ffff88806169c247 R12: 0000000000000002
R13: 0000000000000304 R14: ffff88809d254000 R15: 0000000000000000
FS:  00007fe2bd42c700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000096011000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 xsk_poll+0x180/0x540 net/xdp/xsk.c:387
 sock_poll+0x15e/0x480 net/socket.c:1256
 vfs_poll include/linux/poll.h:90 [inline]
 do_select+0x927/0x16f0 fs/select.c:534
 core_sys_select+0x564/0x890 fs/select.c:677
 do_pselect fs/select.c:759 [inline]
 __do_sys_pselect6 fs/select.c:784 [inline]
 __se_sys_pselect6 fs/select.c:769 [inline]
 __x64_sys_pselect6+0x3df/0x490 fs/select.c:769
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4598e9
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe2bd42bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004598e9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040
RBP: 000000000075bf20 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 00007fe2bd42c6d4
R13: 00000000004c6c05 R14: 00000000004dbe68 R15: 00000000ffffffff
Modules linked in:
CR2: 0000000000000000
---[ end trace 2329f3e83af975eb ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff88805a65f688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88806169c000 RCX: 1ffff1100c2d3894
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88809d254000
RBP: ffff88805a65f6c0 R08: ffff888063a24240 R09: ffffed100c2d3849
R10: ffffed100c2d3848 R11: ffff88806169c247 R12: 0000000000000002
R13: 0000000000000304 R14: ffff88809d254000 R15: 0000000000000000
FS:  00007fe2bd42c700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000738000 CR3: 0000000096011000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400