From: Alexey Dobriyan <adobriyan@gmail.com>
To: "Anvin, H Peter" <h.peter.anvin@intel.com>
Cc: "Ye, Xiaolong" <xiaolong.ye@intel.com>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
Brian Gerst <brgerst@gmail.com>,
Denys Vlasenko <dvlasenk@redhat.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
"tipbuild@zytor.com" <tipbuild@zytor.com>,
"lkp@01.org" <lkp@01.org>
Subject: Re: [lkp-robot] [x86/asm] 51bad67ffb: int3:#[##]
Date: Wed, 16 May 2018 00:43:37 +0300 [thread overview]
Message-ID: <20180515214337.GA18021@avx2> (raw)
In-Reply-To: <C40DC70F50313144AB3AF8625D4F407F90689B42@ORSMSX101.amr.corp.intel.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: Alexey Dobriyan <adobriyan@gmail.com>
To: lkp@lists.01.org
Subject: Re: [lkp-robot] [x86/asm] 51bad67ffb: int3:#[##]
Date: Wed, 16 May 2018 00:43:37 +0300 [thread overview]
Message-ID: <20180515214337.GA18021@avx2> (raw)
In-Reply-To: <C40DC70F50313144AB3AF8625D4F407F90689B42@ORSMSX101.amr.corp.intel.com>
[-- Attachment #1: Type: text/plain, Size: 1162 bytes --]
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
next prev parent reply other threads:[~2018-05-15 21:43 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-15 8:00 [lkp-robot] [x86/asm] 51bad67ffb: int3:#[##] kernel test robot
2018-05-15 8:00 ` kernel test robot
2018-05-15 21:07 ` Alexey Dobriyan
2018-05-15 21:07 ` Alexey Dobriyan
2018-05-15 21:25 ` Anvin, H Peter
2018-05-15 21:43 ` Alexey Dobriyan [this message]
2018-05-15 21:43 ` Alexey Dobriyan
2018-05-15 22:22 ` Josh Poimboeuf
2018-05-15 22:22 ` Josh Poimboeuf
2018-05-15 22:26 ` Thomas Gleixner
2018-05-15 22:26 ` Thomas Gleixner
2018-05-15 22:28 ` Linus Torvalds
2018-05-15 22:28 ` Linus Torvalds
2018-05-15 22:43 ` Josh Poimboeuf
2018-05-15 22:43 ` Josh Poimboeuf
2018-05-15 22:52 ` Linus Torvalds
2018-05-15 22:52 ` Linus Torvalds
2018-05-15 23:05 ` Linus Torvalds
2018-05-15 23:05 ` Linus Torvalds
2018-05-16 3:30 ` Josh Poimboeuf
2018-05-16 3:30 ` Josh Poimboeuf
2018-05-17 13:49 ` [PATCH] objtool: Detect assembly code falling through to INT3 padding Josh Poimboeuf
2018-05-17 13:49 ` Josh Poimboeuf
2018-05-17 14:01 ` Peter Zijlstra
2018-05-17 14:01 ` Peter Zijlstra
2018-05-18 7:24 ` Ingo Molnar
2018-05-18 7:24 ` Ingo Molnar
2018-05-18 7:18 ` Ingo Molnar
2018-05-18 7:18 ` Ingo Molnar
2018-05-18 7:27 ` H. Peter Anvin
2018-05-18 16:06 ` Borislav Petkov
2018-05-18 16:06 ` Borislav Petkov
2018-05-18 7:27 ` Ingo Molnar
2018-05-18 7:27 ` Ingo Molnar
2018-05-18 17:51 ` Alexey Dobriyan
2018-05-18 17:51 ` Alexey Dobriyan
2018-05-19 8:18 ` hpa
2018-05-19 7:00 ` "interesting" entry in hibernation code was Re: [lkp-robot] [x86/asm] 51bad67ffb: int3:#[##] Pavel Machek
2018-05-19 7:00 ` Pavel Machek
2018-05-19 8:35 ` Rafael J. Wysocki
2018-05-19 8:35 ` Rafael J. Wysocki
2018-05-18 7:15 ` Ingo Molnar
2018-05-18 7:15 ` Ingo Molnar
2018-05-15 22:25 ` Thomas Gleixner
2018-05-15 22:25 ` Thomas Gleixner
2018-05-15 22:29 ` Andy Lutomirski
2018-05-15 22:29 ` Andy Lutomirski
2018-05-15 22:27 ` Linus Torvalds
2018-05-15 22:27 ` Linus Torvalds
2018-05-15 22:50 ` Alexey Dobriyan
2018-05-15 22:50 ` Alexey Dobriyan
2018-05-15 22:58 ` [PATCH v2] x86/asm: Pad assembly functions with INT3 instructions Alexey Dobriyan
2018-05-15 22:58 ` Alexey Dobriyan
2018-05-15 23:28 ` Linus Torvalds
2018-05-15 23:28 ` Linus Torvalds
2018-05-18 7:36 ` Ingo Molnar
2018-05-18 7:36 ` Ingo Molnar
2018-05-18 13:02 ` Josh Poimboeuf
2018-05-18 13:02 ` Josh Poimboeuf
2018-05-18 17:34 ` Alexey Dobriyan
2018-05-18 17:34 ` Alexey Dobriyan
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