general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f]
CPU: 1 PID: 6851 Comm: syz-executor748 Not tainted 5.7.0-rc7-next-20200529-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_con_write.part.0+0x9a3/0x1dc0 drivers/tty/vt/vt.c:2786
Code: 24 ae 00 00 00 45 01 ef e8 0a 02 84 fd 48 8b 44 24 60 80 38 00 0f 85 af 11 00 00 49 8b 9c 24 f0 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 e6
RSP: 0018:ffffc90001717900 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83eef946
RDX: 0000000000000000 RSI: ffffffff83eef996 RDI: 0000000000000003
RBP: dffffc0000000000 R08: ffff888094b4e2c0 R09: fffffbfff155b432
R10: ffffffff8aada18f R11: fffffbfff155b431 R12: ffff8880a89e0000
R13: 0000000000000000 R14: ffff8880a89e03dc R15: 000000000000075e
FS:  0000000000e29880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004b4c33 CR3: 000000009e38d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_con_write drivers/tty/vt/vt.c:3170 [inline]
 con_put_char+0xf0/0x100 drivers/tty/vt/vt.c:3169
 tty_put_char+0xb7/0x150 drivers/tty/tty_io.c:3031
 __process_echoes+0x56d/0xa00 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+0xc65/0x2b10 drivers/tty/n_tty.c:1742
 tiocsti drivers/tty/tty_io.c:2196 [inline]
 tty_ioctl+0x905/0x1440 drivers/tty/tty_io.c:2572
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x441459
Code: e8 3c ad 02 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd87315298 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441459
RDX: 00000000200000c0 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00000000006cc018 R08: 000000000000000e R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402280
R13: 0000000000402310 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace e383be3934094729 ]---
RIP: 0010:do_con_write.part.0+0x9a3/0x1dc0 drivers/tty/vt/vt.c:2786
Code: 24 ae 00 00 00 45 01 ef e8 0a 02 84 fd 48 8b 44 24 60 80 38 00 0f 85 af 11 00 00 49 8b 9c 24 f0 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 e6
RSP: 0018:ffffc90001717900 EFLAGS: 00010203
RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83eef946
RDX: 0000000000000000 RSI: ffffffff83eef996 RDI: 0000000000000003
RBP: dffffc0000000000 R08: ffff888094b4e2c0 R09: fffffbfff155b432
R10: ffffffff8aada18f R11: fffffbfff155b431 R12: ffff8880a89e0000
R13: 0000000000000000 R14: ffff8880a89e03dc R15: 000000000000075e
FS:  0000000000e29880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004b4c33 CR3: 000000009e38d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400