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: 19046 Comm: syz-executor.2 Not tainted 5.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_con_write+0x1a6a/0xf2d0 drivers/tty/vt/vt.c:2786
Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 55 da b1 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 c5 02 00 00 66 44 89 33 48 c7 c7 24 40
RSP: 0018:ffffc90001377870 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: 0000000000040000
RDX: ffff8880601e8500 RSI: 0000000000000000 RDI: ffff8880912633f0
RBP: ffffc90001377b58 R08: ffffffff8401c522 R09: ffffffff83ffed80
R10: 0000000000000006 R11: ffff8880601e8500 R12: ffff888091263000
R13: dffffc0000000000 R14: 0000000000000e5e R15: 1ffff1101224c67e
FS:  00007f717336e700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff3cc764db8 CR3: 000000005a470000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 con_put_char+0x7d/0xc0 drivers/tty/vt/vt.c:3169
 tty_put_char+0x97/0x110 drivers/tty/tty_io.c:3031
 do_output_char+0x586/0x940 drivers/tty/n_tty.c:488
 __process_echoes+0x2a3/0x930 drivers/tty/n_tty.c:739
 flush_echoes drivers/tty/n_tty.c:829 [inline]
 __receive_buf drivers/tty/n_tty.c:1648 [inline]
 n_tty_receive_buf_common+0x29fa/0x3100 drivers/tty/n_tty.c:1742
 tiocsti drivers/tty/tty_io.c:2196 [inline]
 tty_ioctl+0xd5b/0x15c0 drivers/tty/tty_io.c:2572
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl fs/ioctl.c:753 [inline]
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:760
 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c1d9
Code: Bad RIP value.
RSP: 002b:00007f717336dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000000121c0 RCX: 000000000045c1d9
RDX: 0000000020000800 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffd4d58eb9f R14: 00007f717336e9c0 R15: 000000000078bf0c
Modules linked in:
---[ end trace c053de09d84fed83 ]---
RIP: 0010:do_con_write+0x1a6a/0xf2d0 drivers/tty/vt/vt.c:2786
Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 55 da b1 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 c5 02 00 00 66 44 89 33 48 c7 c7 24 40
RSP: 0018:ffffc90001377870 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: 0000000000040000
RDX: ffff8880601e8500 RSI: 0000000000000000 RDI: ffff8880912633f0
RBP: ffffc90001377b58 R08: ffffffff8401c522 R09: ffffffff83ffed80
R10: 0000000000000006 R11: ffff8880601e8500 R12: ffff888091263000
R13: dffffc0000000000 R14: 0000000000000e5e R15: 1ffff1101224c67e
FS:  00007f717336e700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff3cc764db8 CR3: 000000005a470000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400