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: 1 PID: 8704 Comm: syz-executor811 Not tainted 5.5.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_con_write+0x1aea/0xf360 drivers/tty/vt/vt.c:2760
Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 85 fe b8 fd 48 8b 7c 24 60 48 8b 1f 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 ce 02 00 00 66 44 89 33 48 c7 c7 dc 91
RSP: 0018:ffffc900021b7850 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: ffff8880950f8380
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a06b53a0
RBP: ffffc900021b7b38 R08: ffffffff83f9bbd8 R09: ffffffff83f7ef74
R10: ffff8880950f8380 R11: 0000000000000006 R12: ffff8880a06b5000
R13: dffffc0000000000 R14: 0000000000000764 R15: 1ffff110140d6a74
FS:  0000000000e68880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001440 CR3: 00000000a6f78000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 con_write+0x25/0x40 drivers/tty/vt/vt.c:3135
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0xd0c/0x1200 drivers/tty/n_tty.c:2333
 do_tty_write drivers/tty/tty_io.c:962 [inline]
 tty_write+0x5a1/0x950 drivers/tty/tty_io.c:1046
 do_loop_readv_writev fs/read_write.c:717 [inline]
 do_iter_write+0x43f/0x590 fs/read_write.c:972
 vfs_writev fs/read_write.c:1015 [inline]
 do_writev+0x239/0x490 fs/read_write.c:1058
 __do_sys_writev fs/read_write.c:1131 [inline]
 __se_sys_writev fs/read_write.c:1128 [inline]
 __x64_sys_writev+0x7d/0x90 fs/read_write.c:1128
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441509
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:00007ffde665fa48 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441509
RDX: 0000000000000001 RSI: 0000000020001440 RDI: 0000000000000003
RBP: 00000000006cc018 R08: 000000000000000e R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402280
R13: 0000000000402310 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 52cc2dcd4616e103 ]---
RIP: 0010:do_con_write+0x1aea/0xf360 drivers/tty/vt/vt.c:2760
Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 85 fe b8 fd 48 8b 7c 24 60 48 8b 1f 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 ce 02 00 00 66 44 89 33 48 c7 c7 dc 91
RSP: 0018:ffffc900021b7850 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: ffff8880950f8380
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a06b53a0
RBP: ffffc900021b7b38 R08: ffffffff83f9bbd8 R09: ffffffff83f7ef74
R10: ffff8880950f8380 R11: 0000000000000006 R12: ffff8880a06b5000
R13: dffffc0000000000 R14: 0000000000000764 R15: 1ffff110140d6a74
FS:  0000000000e68880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001440 CR3: 00000000a6f78000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400