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: 6443 Comm: syz-executor800 Not tainted 4.19.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_con_write.part.0+0x9c3/0x1db0 drivers/tty/vt/vt.c:2760
Code: 24 b6 00 00 00 45 01 ef e8 aa dd c7 fd 48 8b 44 24 78 80 38 00 0f 85 4c 12 00 00 49 8b 9c 24 a0 03 00 00 48 89 d8 48 c1 e8 03 <0f> b6 14 28 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 c8
RSP: 0000:ffff888089fff930 EFLAGS: 00010202
RAX: 000000001fffffe9 RBX: 00000000ffffff48 RCX: ffffffff839fc676
RDX: 0000000000000000 RSI: ffffffff839fc6c6 RDI: 0000000000000003
RBP: dffffc0000000000 R08: ffff888089a32680 R09: 0000000000000005
R10: ffffed1015cc4732 R11: ffff8880ae623993 R12: ffff8880a4d23500
R13: 0000000000000000 R14: ffff8880a4d2388c R15: 0000000000000778
FS:  0000000001da2880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86de4f4150 CR3: 00000000a8c01000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_con_write drivers/tty/vt/vt.c:2565 [inline]
 con_write+0x41/0xe0 drivers/tty/vt/vt.c:3132
 process_output_block drivers/tty/n_tty.c:593 [inline]
 n_tty_write+0x3ee/0x1080 drivers/tty/n_tty.c:2331
 do_tty_write drivers/tty/tty_io.c:960 [inline]
 tty_write+0x452/0x790 drivers/tty/tty_io.c:1044
 __vfs_write+0xf7/0x760 fs/read_write.c:485
 vfs_write+0x206/0x550 fs/read_write.c:549
 ksys_write+0x12b/0x2a0 fs/read_write.c:599
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441639
Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc7319bde8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441639
RDX: 0000000000000320 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00000000006cc018 R08: 000000000000000e R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004023b0
R13: 0000000000402440 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace c50d52df6e3c7bb6 ]---
RIP: 0010:do_con_write.part.0+0x9c3/0x1db0 drivers/tty/vt/vt.c:2760
Code: 24 b6 00 00 00 45 01 ef e8 aa dd c7 fd 48 8b 44 24 78 80 38 00 0f 85 4c 12 00 00 49 8b 9c 24 a0 03 00 00 48 89 d8 48 c1 e8 03 <0f> b6 14 28 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 c8
RSP: 0000:ffff888089fff930 EFLAGS: 00010202
RAX: 000000001fffffe9 RBX: 00000000ffffff48 RCX: ffffffff839fc676
RDX: 0000000000000000 RSI: ffffffff839fc6c6 RDI: 0000000000000003
RBP: dffffc0000000000 R08: ffff888089a32680 R09: 0000000000000005
R10: ffffed1015cc4732 R11: ffff8880ae623993 R12: ffff8880a4d23500
R13: 0000000000000000 R14: ffff8880a4d2388c R15: 0000000000000778
FS:  0000000001da2880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86de4f4150 CR3: 00000000a8c01000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400