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