BUG: unable to handle kernel paging request at ffff88800100005e PGD de01067 P4D de01067 PUD de02067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 30232 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 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:ffff8880b527f668 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88800100005f RCX: 0000000000000004 RDX: ffff88800100005e RSI: ffffffff839e7e4f RDI: ffff888238d88c4c RBP: ffff888238d88c4d R08: 0000000000001727 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000001000062 R13: ffff888001000062 R14: ffff88800100005e R15: dffffc0000000000 FS: 00007f872823a700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88800100005e CR3: 00000000a9cb3000 CR4: 00000000003406e0 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+0xbcd/0x1d90 drivers/tty/vt/vt.c:2827 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3163 process_output_block drivers/tty/n_tty.c:593 [inline] n_tty_write+0x3c0/0xff0 drivers/tty/n_tty.c:2331 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: 0033:0x7f87298c5279 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:00007f872823a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f87299d7f80 RCX: 00007f87298c5279 RDX: 00000000000001b7 RSI: 0000000020001040 RDI: 0000000000000004 RBP: 00007f872991f189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb8040faf R14: 00007f872823a300 R15: 0000000000022000 Modules linked in: CR2: ffff88800100005e ---[ end trace 5325a900579dc560 ]--- 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:ffff8880b527f668 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88800100005f RCX: 0000000000000004 RDX: ffff88800100005e RSI: ffffffff839e7e4f RDI: ffff888238d88c4c RBP: ffff888238d88c4d R08: 0000000000001727 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000001000062 R13: ffff888001000062 R14: ffff88800100005e R15: dffffc0000000000 FS: 00007f872823a700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88800100005e CR3: 00000000a9cb3000 CR4: 00000000003406e0 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