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 Modules linked in: CPU: 0 PID: 13194 Comm: syz-executor.2 Not tainted 4.14.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809f240180 task.stack: ffff88802fb60000 RIP: 0010:do_con_write+0x702/0x19b0 drivers/tty/vt/vt.c:2411 RSP: 0018:ffff88802fb679c0 EFLAGS: 00010203 RAX: 0000000020000001 RBX: 00000000000007fe RCX: ffffc9000aeac000 RDX: 0000000000001dd3 RSI: ffffffff83480915 RDI: ffff88804d3af7fd RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88809f240180 R12: ffff88804d3af480 R13: ffff88804d3af80c R14: 000000010000000e R15: ffff8880559bd302 FS: 00007faed9934700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000300 CR3: 0000000096c93000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: con_write+0x21/0xa0 drivers/tty/vt/vt.c:2798 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0x352/0xda0 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:959 [inline] tty_write+0x410/0x740 drivers/tty/tty_io.c:1043 __vfs_write+0xe4/0x630 fs/read_write.c:480 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45c369 RSP: 002b:00007faed9933c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000037380 RCX: 000000000045c369 RDX: 000000000208e24b RSI: 0000000020000040 RDI: 0000000000000003 RBP: 000000000078bfe0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac R13: 00007ffdd26ba10f R14: 00007faed99349c0 R15: 000000000078bfac Code: b2 00 00 00 66 03 5c 24 30 e8 5b 8d 13 fe 48 8b 44 24 78 80 38 00 0f 85 4c 10 00 00 4d 8b b4 24 a0 03 00 00 4c 89 f0 48 c1 e8 03 <0f> b6 14 28 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 RIP: do_con_write+0x702/0x19b0 drivers/tty/vt/vt.c:2411 RSP: ffff88802fb679c0 ---[ end trace b58a7e3b94ad5ebd ]---