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SubjectRe: [lkp-robot] [x86/asm] 51bad67ffb: int3:#[##]
On Tue, May 15, 2018 at 09:25:53PM +0000, Anvin, H Peter wrote:
> Why is that a problem?
> Code: 00 00 00 eb e6 cc cc cc cc cc cc cc cc cc cc cc cc cc fa 8d b6 00 00 00 00 e8 5d e8 8f ff 8b 44 24 34 83 e0 03 83 f8 03 72 28 cc <cc> cc cc cc cc cc cc fa 8d b6 00 00 00 00 e8 3d e8 8f ff 89 e0
>
> EIP: ret_from_intr+0xd/0x14 SS:ESP: 0068:8603bfb4
>
> INT3 slipped through M586 => X86_ALIGNMENT_16 :-\

I could make the patch x86_64 only, but!

It crashed into the middle of the padding.

796ef8fc <ret_from_intr>:
796ef8fc: 8b 44 24 34 mov eax,DWORD PTR [esp+0x34]
796ef900: 83 e0 03 and eax,0x3
796ef903: 83 f8 03 cmp eax,0x3
796ef906: 72 28 jb 796ef930 <resume_kernel>
796ef908: cc int3
796ef909: cc <========> int3
796ef90a: cc int3
796ef90b: cc int3
796ef90c: cc int3
796ef90d: cc int3
796ef90e: cc int3
796ef90f: cc int3

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