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
Modules linked in:
CPU: 1 PID: 19451 Comm: syz-executor.3 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88804c9e6100 task.stack: ffff88804bb38000
RIP: 0010:do_con_write+0x702/0x19b0 drivers/tty/vt/vt.c:2411
RSP: 0018:ffff88804bb3f9c0 EFLAGS: 00010202
RAX: 0000000000000004 RBX: 00000000000007fe RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880a11d453d
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88804c9e6100 R12: ffff8880a11d41c0
R13: ffff8880a11d454c R14: 0000000000000020 R15: ffff888052f70dc9
FS:  00007f12c10cc700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff2 CR3: 000000009e859000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2798
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0x352/0xda0 drivers/tty/n_tty.c:2333
 do_tty_write drivers/tty/tty_io.c:959 [inline]
 tty_write+0x410/0x740 drivers/tty/tty_io.c:1043
 __vfs_write+0xe4/0x630 fs/read_write.c:480
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c1f9
RSP: 002b:00007f12c10cbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000036d80 RCX: 000000000045c1f9
RDX: 000000000000000a RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007fff7dfbca5f R14: 00007f12c10cc9c0 R15: 000000000078bf0c
Code: b2 00 00 00 66 03 5c 24 30 e8 5b 8d 13 fe 48 8b 44 24 78 80 38 00 0f 85 4c 10 00 00 4d 8b b4 24 a0 03 00 00 4c 89 f0 48 c1 e8 03 <0f> b6 14 28 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 
RIP: do_con_write+0x702/0x19b0 drivers/tty/vt/vt.c:2411 RSP: ffff88804bb3f9c0
---[ end trace fc14ce4cbedc1252 ]---