general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f]
CPU: 0 PID: 24791 Comm: syz-executor.5 Not tainted 5.8.0-rc6-next-20200721-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vc_con_write_normal drivers/tty/vt/vt.c:2810 [inline]
RIP: 0010:do_con_write+0x8dd/0x1d70 drivers/tty/vt/vt.c:2903
Code: 59 25 84 fd 48 8b 44 24 18 0b 5c 24 74 80 38 00 0f 85 f4 10 00 00 4d 8b a6 08 04 00 00 4c 89 e0 4c 89 e2 48 c1 e8 03 83 e2 07 <0f> b6 0c 28 83 c2 01 38 ca 7c 08 84 c9 0f 85 c0 10 00 00 66 41 89
RSP: 0018:ffffc90006097928 EFLAGS: 00010206
RAX: 0000000020000001 RBX: 0000000000000e5e RCX: ffffc90013ca4000
RDX: 0000000000000006 RSI: ffffffff83f01b07 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff888092886a88
R10: 0000000000000000 R11: 0000000000000000 R12: 000000010000000e
R13: 0000000000000001 R14: ffff88806181b000 R15: 0000000000000100
FS:  00007f3ec06aa700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000100 CR3: 0000000057404000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 con_put_char+0x96/0xe0 drivers/tty/vt/vt.c:3253
 tty_put_char+0xb7/0x150 drivers/tty/tty_io.c:3031
 __process_echoes+0x577/0x9f0 drivers/tty/n_tty.c:728
 flush_echoes drivers/tty/n_tty.c:829 [inline]
 __receive_buf drivers/tty/n_tty.c:1648 [inline]
 n_tty_receive_buf_common+0xb88/0x2bc0 drivers/tty/n_tty.c:1742
 tiocsti drivers/tty/tty_io.c:2196 [inline]
 tty_ioctl+0xf2e/0x15f0 drivers/tty/tty_io.c:2572
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c1f9
Code: Bad RIP value.
RSP: 002b:00007f3ec06a9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000017680 RCX: 000000000045c1f9
RDX: 0000000020000100 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffe7fdb815f R14: 00007f3ec06aa9c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace 806ee3a9a739aed3 ]---
RIP: 0010:vc_con_write_normal drivers/tty/vt/vt.c:2810 [inline]
RIP: 0010:do_con_write+0x8dd/0x1d70 drivers/tty/vt/vt.c:2903
Code: 59 25 84 fd 48 8b 44 24 18 0b 5c 24 74 80 38 00 0f 85 f4 10 00 00 4d 8b a6 08 04 00 00 4c 89 e0 4c 89 e2 48 c1 e8 03 83 e2 07 <0f> b6 0c 28 83 c2 01 38 ca 7c 08 84 c9 0f 85 c0 10 00 00 66 41 89
RSP: 0018:ffffc90006097928 EFLAGS: 00010206
RAX: 0000000020000001 RBX: 0000000000000e5e RCX: ffffc90013ca4000
RDX: 0000000000000006 RSI: ffffffff83f01b07 RDI: 0000000000000005
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff888092886a88
R10: 0000000000000000 R11: 0000000000000000 R12: 000000010000000e
R13: 0000000000000001 R14: ffff88806181b000 R15: 0000000000000100
FS:  00007f3ec06aa700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000100 CR3: 0000000057404000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400