TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
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: 15737 Comm: syz-executor.0 Not tainted 4.19.133-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_con_write+0x94d/0x1d90 drivers/tty/vt/vt.c:2766
Code: 03 9c 24 ba 00 00 00 01 dd e8 ef ea bd fd 48 8b 44 24 70 80 38 00 0f 85 75 11 00 00 49 8b 9d a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 30 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffff888044e7f880 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffc90005aac000
RDX: 0000000000000ff3 RSI: ffffffff83abbde1 RDI: 0000000000000003
RBP: 00000000000007fe R08: ffffffff83aa5bd0 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88809479b300 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f2fe8ee3700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e0ed0 CR3: 0000000094c1d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3138
 process_output_block drivers/tty/n_tty.c:593 [inline]
 n_tty_write+0x3c0/0xff0 drivers/tty/n_tty.c:2331
 do_tty_write drivers/tty/tty_io.c:960 [inline]
 tty_write+0x496/0x810 drivers/tty/tty_io.c:1044
 do_loop_readv_writev fs/read_write.c:704 [inline]
 do_loop_readv_writev fs/read_write.c:688 [inline]
 do_iter_write+0x461/0x5d0 fs/read_write.c:962
 vfs_writev+0x153/0x2e0 fs/read_write.c:1005
 do_writev+0x136/0x330 fs/read_write.c:1040
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c1d9
Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2fe8ee2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000037880 RCX: 000000000045c1d9
RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffed3f6126f R14: 00007f2fe8ee39c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace 84e224ff46a84f62 ]---
RIP: 0010:do_con_write+0x94d/0x1d90 drivers/tty/vt/vt.c:2766
Code: 03 9c 24 ba 00 00 00 01 dd e8 ef ea bd fd 48 8b 44 24 70 80 38 00 0f 85 75 11 00 00 49 8b 9d a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 30 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffff888044e7f880 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffc90005aac000
RDX: 0000000000000ff3 RSI: ffffffff83abbde1 RDI: 0000000000000003
RBP: 00000000000007fe R08: ffffffff83aa5bd0 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88809479b300 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f2fe8ee3700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e0ed0 CR3: 0000000094c1d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400