FAT-fs (loop3): bogus number of reserved sectors
FAT-fs (loop3): Can't find a valid FAT filesystem
divide error: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7135 Comm: kworker/1:0 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
task: ffff8880455f0340 task.stack: ffff88804bad8000
RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:354 [inline]
RIP: 0010:fbcon_switch+0x1cb/0x1700 drivers/video/fbdev/core/fbcon.c:2195
RSP: 0018:ffff88804badfa88 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8ad6fec0 RDI: ffff888084ed237c
RBP: ffff8880a5fa0040 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888084ed2040
R13: ffff8882192d0e80 R14: 0000000000000001 R15: ffff888084ed24b8
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004f2f70 CR3: 00000000a83a2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 redraw_screen+0x332/0x760 drivers/tty/vt/vt.c:689
 complete_change_console+0xf9/0x350 drivers/tty/vt/vt_ioctl.c:1284
 change_console+0x156/0x270 drivers/tty/vt/vt_ioctl.c:1409
 console_callback+0x32c/0x380 drivers/tty/vt/vt.c:2473
 process_one_work+0x7c0/0x14c0 kernel/workqueue.c:2116
 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 0c a6 bc 07 83 c2 03 48 89 2d 42 a6 bc 07 48 89 2d bb a5 bc 07 38 ca 7c 08 84 c9 0f 85 9a 13 00 00 41 8b 9c 24 3c 03 00 00 31 d2 <f7> f3 83 f8 05 89 44 24 10 0f 8e b8 0a 00 00 e8 31 52 40 fe 8b 
RIP: fbcon_update_softback drivers/video/fbdev/core/fbcon.c:354 [inline] RSP: ffff88804badfa88
RIP: fbcon_switch+0x1cb/0x1700 drivers/video/fbdev/core/fbcon.c:2195 RSP: ffff88804badfa88
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#2] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7135 Comm: kworker/1:0 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
task: ffff8880455f0340 task.stack: ffff88804bad8000
RIP: 0010:fbcon_cursor+0x10e/0x690 drivers/video/fbdev/core/fbcon.c:1328
RSP: 0018:ffff88804badf640 EFLAGS: 00010003
RAX: dffffc0000000000 RBX: ffff888219487500 RCX: 0000000000000004
RDX: 0000000020000001 RSI: 0000000000000001 RDI: ffff888084ed23e0
RBP: ffff888084ed2040 R08: ffff8880455f0340 R09: dffffc0000000000
R10: ffff88821fff7050 R11: 0000000000000000 R12: ffff8882192d0e80
R13: 0000000000000001 R14: 000000010000000e R15: ffff8882192d12f0
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004f2f70 CR3: 00000000a83a2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fbcon_blank+0x777/0xd20 drivers/video/fbdev/core/fbcon.c:2364
 do_unblank_screen drivers/tty/vt/vt.c:3929 [inline]
 do_unblank_screen+0x1fd/0x4e0 drivers/tty/vt/vt.c:3896
 bust_spinlocks+0x52/0xc0
 oops_end+0x2b/0xd0 arch/x86/kernel/dumpstack.c:281
 do_trap_no_signal arch/x86/kernel/traps.c:213 [inline]
 do_trap+0x1b8/0x250 arch/x86/kernel/traps.c:257
 do_error_trap+0x132/0x2d0 arch/x86/kernel/traps.c:301
 divide_error+0x1b/0x40 arch/x86/entry/entry_64.S:961
RIP: 0010:fbcon_update_softback drivers/video/fbdev/core/fbcon.c:354 [inline]
RIP: 0010:fbcon_switch+0x1cb/0x1700 drivers/video/fbdev/core/fbcon.c:2195
RSP: 0018:ffff88804badfa88 EFLAGS: 00010246
RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8ad6fec0 RDI: ffff888084ed237c
RBP: ffff8880a5fa0040 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888084ed2040
R13: ffff8882192d0e80 R14: 0000000000000001 R15: ffff888084ed24b8
 redraw_screen+0x332/0x760 drivers/tty/vt/vt.c:689
 complete_change_console+0xf9/0x350 drivers/tty/vt/vt_ioctl.c:1284
 change_console+0x156/0x270 drivers/tty/vt/vt_ioctl.c:1409
 console_callback+0x32c/0x380 drivers/tty/vt/vt.c:2473
 process_one_work+0x7c0/0x14c0 kernel/workqueue.c:2116
 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 27 05 00 00 4c 8b b5 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 
RIP: fbcon_cursor+0x10e/0x690 drivers/video/fbdev/core/fbcon.c:1328 RSP: ffff88804badf640
---[ end trace 37c46db9d8d33964 ]---