syzbot


BUG: unable to handle kernel paging request in vga16fb_imageblit (2)

Status: auto-obsoleted due to no activity on 2023/01/02 18:50
Reported-by: syzbot+b6895240ddf11bc2942d@syzkaller.appspotmail.com
First crash: 1361d, last: 689d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel paging request in vga16fb_imageblit (3) fbdev 1 923d 919d 0/27 auto-closed as invalid on 2022/04/13 17:39
linux-4.19 BUG: unable to handle kernel paging request in vga16fb_imageblit 4 1575d 1671d 0/1 auto-closed as invalid on 2020/07/31 03:49
upstream BUG: unable to handle kernel paging request in vga16fb_imageblit fbdev 1 1673d 1671d 0/27 auto-closed as invalid on 2020/04/23 17:11
upstream BUG: unable to handle kernel paging request in vga16fb_imageblit (2) fbdev C done 27 1170d 1538d 20/27 fixed on 2021/11/10 00:50
linux-4.14 BUG: unable to handle kernel paging request in vga16fb_imageblit 8 1169d 1561d 0/1 auto-closed as invalid on 2021/09/09 11:30

Sample crash report:
BUG: unable to handle kernel paging request at ffff888001000060
PGD de01067 P4D de01067 PUD de02067 PMD 80000000010001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4116 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xc2f/0x2260 drivers/video/fbdev/vga16fb.c:1260
Code: 48 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 38 38 c8 7f 08 84 c0 0f 85 86 0f 00 00 0f b6 45 ff <88> 02 44 89 e6 31 ff 29 de e8 53 08 c4 fd 4c 39 eb 75 b8 48 8b 7c
RSP: 0018:ffff888050887668 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000061 RCX: 0000000000000007
RDX: ffff888001000060 RSI: ffffffff839e7e4f RDI: ffff8880b07906df
RBP: ffff8880b07906e0 R08: 0000000000000b93 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000001000065
R13: ffff888001000065 R14: ffff888001000060 R15: dffffc0000000000
FS:  00007f0489461700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000060 CR3: 000000009fd03000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 bit_putcs_unaligned drivers/video/fbdev/core/bitblit.c:139 [inline]
 bit_putcs+0x6e2/0xd10 drivers/video/fbdev/core/bitblit.c:188
 fbcon_putcs+0x336/0x4f0 drivers/video/fbdev/core/fbcon.c:1269
 con_flush drivers/tty/vt/vt.c:2577 [inline]
 do_con_write+0x1269/0x1d90 drivers/tty/vt/vt.c:2782
 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3163
 n_tty_write+0xa03/0xff0 drivers/tty/n_tty.c:2354
 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: 0033:0x7f048aaec279
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0489461168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f048abfef80 RCX: 00007f048aaec279
RDX: 0000000000001006 RSI: 0000000020001040 RDI: 0000000000000004
RBP: 00007f048ab462e9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd563bc77f R14: 00007f0489461300 R15: 0000000000022000
Modules linked in:
CR2: ffff888001000060
---[ end trace 7a71153934bde375 ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xc2f/0x2260 drivers/video/fbdev/vga16fb.c:1260
Code: 48 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 38 38 c8 7f 08 84 c0 0f 85 86 0f 00 00 0f b6 45 ff <88> 02 44 89 e6 31 ff 29 de e8 53 08 c4 fd 4c 39 eb 75 b8 48 8b 7c
RSP: 0018:ffff888050887668 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000061 RCX: 0000000000000007
RDX: ffff888001000060 RSI: ffffffff839e7e4f RDI: ffff8880b07906df
RBP: ffff8880b07906e0 R08: 0000000000000b93 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000001000065
R13: ffff888001000065 R14: ffff888001000060 R15: dffffc0000000000
FS:  00007f0489461700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000060 CR3: 000000009fd03000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 83 c5 01          	add    $0x1,%rbp
   4:	48 89 f8             	mov    %rdi,%rax
   7:	48 89 f9             	mov    %rdi,%rcx
   a:	48 83 c3 01          	add    $0x1,%rbx
   e:	48 c1 e8 03          	shr    $0x3,%rax
  12:	83 e1 07             	and    $0x7,%ecx
  15:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax
  1a:	38 c8                	cmp    %cl,%al
  1c:	7f 08                	jg     0x26
  1e:	84 c0                	test   %al,%al
  20:	0f 85 86 0f 00 00    	jne    0xfac
  26:	0f b6 45 ff          	movzbl -0x1(%rbp),%eax
* 2a:	88 02                	mov    %al,(%rdx) <-- trapping instruction
  2c:	44 89 e6             	mov    %r12d,%esi
  2f:	31 ff                	xor    %edi,%edi
  31:	29 de                	sub    %ebx,%esi
  33:	e8 53 08 c4 fd       	callq  0xfdc4088b
  38:	4c 39 eb             	cmp    %r13,%rbx
  3b:	75 b8                	jne    0xfffffff5
  3d:	48                   	rex.W
  3e:	8b                   	.byte 0x8b
  3f:	7c                   	.byte 0x7c

Crashes (26):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/09/04 18:49 linux-4.19.y 3f8a27f9e27b 28811d0a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/08/23 18:46 linux-4.19.y 3f8a27f9e27b cea8b0f7 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/08/23 09:31 linux-4.19.y 3f8a27f9e27b 26a13b38 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/06/11 00:36 linux-4.19.y 3f8a27f9e27b 0d5abf15 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/04/27 03:30 linux-4.19.y 3f8a27f9e27b 1fa34c1b .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/04/25 12:52 linux-4.19.y 3f8a27f9e27b 131df97d .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/02/26 01:45 linux-4.19.y 3f8a27f9e27b 45a13a73 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/02/24 03:20 linux-4.19.y 3f8a27f9e27b 6e821dbf .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/02/19 03:05 linux-4.19.y 3f8a27f9e27b 3cd800e4 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/02/08 22:21 linux-4.19.y 3f8a27f9e27b 0b33604d .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2022/01/18 03:33 linux-4.19.y 3f8a27f9e27b 731a2d23 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/12/29 07:16 linux-4.19.y 3f8a27f9e27b 76c8cf06 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/12/25 23:26 linux-4.19.y 3f8a27f9e27b 6caa12e4 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/12/21 09:49 linux-4.19.y 3f8a27f9e27b a938f0b8 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/12/05 02:13 linux-4.19.y 3f8a27f9e27b a617004c .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/12/03 10:29 linux-4.19.y 3f8a27f9e27b 61f86278 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/09/19 08:58 linux-4.19.y b172b44fcb17 70b76c1d .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/08/03 20:42 linux-4.19.y 53bd76690e27 6c236867 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/06/10 02:11 linux-4.19.y 1722257b8ece 1ba81399 .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/03/30 15:09 linux-4.19.y 2034d6f0838e 6a81331a .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/02/08 12:41 linux-4.19.y 811218eceeaa 2ce644fc .config console log report info ci2-linux-4-19 BUG: unable to handle kernel paging request in vga16fb_imageblit
2021/01/12 16:55 linux-4.19.y 610bdbf6a174 2c1f2513 .config console log report info ci2-linux-4-19
2020/12/05 07:29 linux-4.19.y daefdc9eb24b 0ef84591 .config console log report info ci2-linux-4-19
2020/11/09 08:21 linux-4.19.y b94de4d19498 cba33199 .config console log report info ci2-linux-4-19
2020/11/04 23:51 linux-4.19.y f5d8eef067ac cba33199 .config console log report info ci2-linux-4-19
2020/11/01 15:14 linux-4.19.y f5d8eef067ac 8bc4594f .config console log report info ci2-linux-4-19
* Struck through repros no longer work on HEAD.