IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
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: 14756 Comm: agetty Not tainted 4.19.133-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_con_write+0x94d/0x1d90 drivers/tty/vt/vt.c:2766
Code: 03 9c 24 ba 00 00 00 01 dd e8 ef ea bd fd 48 8b 44 24 70 80 38 00 0f 85 75 11 00 00 49 8b 9d a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 30 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffff88804cc87920 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffffffff83abbda1
RDX: 0000000000000000 RSI: ffffffff83abbde1 RDI: 0000000000000003
RBP: 0000000000000744 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88804ab90ec0 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f4048a7f500(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555b1fd3bf98 CR3: 00000000958ff000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3138
 process_output_block drivers/tty/n_tty.c:593 [inline]
 n_tty_write+0x3c0/0xff0 drivers/tty/n_tty.c:2331
 do_tty_write drivers/tty/tty_io.c:960 [inline]
 tty_write+0x496/0x810 drivers/tty/tty_io.c:1044
 __vfs_write+0xf7/0x770 fs/read_write.c:485
 vfs_write+0x1f3/0x540 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: 0033:0x7f404859d970
Code: 73 01 c3 48 8b 0d 28 d5 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 99 2d 2c 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 7e 9b 01 00 48 89 04 24
RSP: 002b:00007ffc2aa14ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f404859d970
RDX: 0000000000000001 RSI: 00007f404885c683 RDI: 0000000000000001
RBP: 00007f404885c683 R08: 00007f404885d760 R09: 00007f4048a7f500
R10: 0000000000000097 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 00007f404885c600 R15: 0000000000000001
Modules linked in:
---[ end trace 5eb92deb0384a12d ]---
RIP: 0010:do_con_write+0x94d/0x1d90 drivers/tty/vt/vt.c:2766
Code: 03 9c 24 ba 00 00 00 01 dd e8 ef ea bd fd 48 8b 44 24 70 80 38 00 0f 85 75 11 00 00 49 8b 9d a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 30 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85
RSP: 0018:ffff88804cc87920 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffffffff83abbda1
RDX: 0000000000000000 RSI: ffffffff83abbde1 RDI: 0000000000000003
RBP: 0000000000000744 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88804ab90ec0 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f4048a7f500(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa287de9600 CR3: 00000000958ff000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400