BUG: unable to handle kernel paging request in vga16fb

BUG: unable to handle kernel paging request in vga16fb_imageblit (3)
Status: auto-closed as invalid on 2022/04/13 17:39
Reported-by: syzbot+0569333f742be476ff6e@syzkaller.appspotmail.com
First crash: 127d, last: 127d

similar bugs (5):
Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
linux-4.19	BUG: unable to handle kernel paging request in vga16fb_imageblit			4	778d	875d	0/1	auto-closed as invalid on 2020/07/31 03:49
upstream	BUG: unable to handle kernel paging request in vga16fb_imageblit			1	877d	875d	0/22	auto-closed as invalid on 2020/04/23 17:11
upstream	BUG: unable to handle kernel paging request in vga16fb_imageblit (2)	C	done	27	373d	742d	22/22	fixed on 2021/11/10 00:50
linux-4.19	BUG: unable to handle kernel paging request in vga16fb_imageblit (2)			22	23d	565d	0/1	upstream: reported on 2020/11/01 15:15
linux-4.14	BUG: unable to handle kernel paging request in vga16fb_imageblit			8	373d	764d	0/1	auto-closed as invalid on 2021/09/09 11:30

Sample crash report:

BUG: unable to handle page fault for address: ffff8880c00a00f3
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 11201067 P4D 11201067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5341 Comm: syz-executor.1 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:writeb arch/x86/include/asm/io.h:66 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xf02/0x2650 drivers/video/fbdev/vga16fb.c:1260
Code: 0f 84 a4 16 00 00 e8 1d 74 d0 fc 66 90 48 8b 04 24 48 8d 58 14 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 4d 14 00 00 8a 03 <41> 88 06 0f ae e8 41 8a 06 b0 05 ba ce 03 00 00 ee 48 c7 c0 98 fc
RSP: 0018:ffffc9000429f400 EFLAGS: 00010246
RAX: 1ffff92000853e00 RBX: ffffc9000429f634 RCX: 1ffffffff1931f93
RDX: 00000000000003cf RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000007 R08: ffffffff8469b878 R09: ffffc9000429f620
R10: fffff52000853ece R11: 0000000000000000 R12: ffff888140dfd210
R13: dffffc0000000000 R14: ffff8880c00a00f3 R15: 00000000c00000e0
FS:  00007f2e5fbd8700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880c00a00f3 CR3: 000000001a049000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bit_putcs+0x18f8/0x1df0
 fbcon_putcs+0x2c0/0x440 drivers/video/fbdev/core/fbcon.c:1277
 do_update_region+0x4f6/0x710 drivers/tty/vt/vt.c:676
 invert_screen+0xc03/0xe40 drivers/tty/vt/vt.c:800
 highlight drivers/tty/vt/selection.c:57 [inline]
 clear_selection+0x55/0x70 drivers/tty/vt/selection.c:84
 vc_do_resize+0x79b/0x1930 drivers/tty/vt/vt.c:1257
 fbcon_modechanged+0x7b6/0x1240 drivers/video/fbdev/core/fbcon.c:2171
 do_fb_ioctl+0x7f2/0x900 drivers/video/fbdev/core/fbmem.c:1114
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f2e61262eb9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2e5fbd8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2e61375f60 RCX: 00007f2e61262eb9
RDX: 0000000020000200 RSI: 0000000000004601 RDI: 0000000000000003
RBP: 00007f2e612bd08d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe1511289f R14: 00007f2e5fbd8300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: ffff8880c00a00f3
---[ end trace 2856e85110900cd1 ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:66 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xf02/0x2650 drivers/video/fbdev/vga16fb.c:1260
Code: 0f 84 a4 16 00 00 e8 1d 74 d0 fc 66 90 48 8b 04 24 48 8d 58 14 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 4d 14 00 00 8a 03 <41> 88 06 0f ae e8 41 8a 06 b0 05 ba ce 03 00 00 ee 48 c7 c0 98 fc
RSP: 0018:ffffc9000429f400 EFLAGS: 00010246
RAX: 1ffff92000853e00 RBX: ffffc9000429f634 RCX: 1ffffffff1931f93
RDX: 00000000000003cf RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000007 R08: ffffffff8469b878 R09: ffffc9000429f620
R10: fffff52000853ece R11: 0000000000000000 R12: ffff888140dfd210
R13: dffffc0000000000 R14: ffff8880c00a00f3 R15: 00000000c00000e0
FS:  00007f2e5fbd8700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880c00a00f3 CR3: 000000001a049000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 84 a4 16 00 00    	je     0x16aa
   6:	e8 1d 74 d0 fc       	callq  0xfcd07428
   b:	66 90                	xchg   %ax,%ax
   d:	48 8b 04 24          	mov    (%rsp),%rax
  11:	48 8d 58 14          	lea    0x14(%rax),%rbx
  15:	48 89 d8             	mov    %rbx,%rax
  18:	48 c1 e8 03          	shr    $0x3,%rax
  1c:	42 8a 04 28          	mov    (%rax,%r13,1),%al
  20:	84 c0                	test   %al,%al
  22:	0f 85 4d 14 00 00    	jne    0x1475
  28:	8a 03                	mov    (%rbx),%al
* 2a:	41 88 06             	mov    %al,(%r14) <-- trapping instruction
  2d:	0f ae e8             	lfence
  30:	41 8a 06             	mov    (%r14),%al
  33:	b0 05                	mov    $0x5,%al
  35:	ba ce 03 00 00       	mov    $0x3ce,%edx
  3a:	ee                   	out    %al,(%dx)
  3b:	48                   	rex.W
  3c:	c7                   	.byte 0xc7
  3d:	c0                   	.byte 0xc0
  3e:	98                   	cwtl
  3f:	fc                   	cld

Crashes (1):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce-smack-root	2022/01/13 17:38	upstream	455e73a07f6e	44d1319a	.config	log	report			info	BUG: unable to handle kernel paging request in vga16fb_imageblit