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From: "Luck, Tony" <tony.luck@intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>
Cc: "x86@kernel.org" <x86@kernel.org>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Peter Ziljstra <peterz@infradead.org>,
	Song Liu <songliubraving@fb.com>,
	Daniel Borkmann <daniel@iogearbox.net>
Subject: RE: [patch V3 00/20] x86/fpu: Clean up exception fixups and error handling in sigframe related code
Date: Wed, 8 Sep 2021 17:01:39 +0000	[thread overview]
Message-ID: <f5d9412b0de4410084b4b8d111784b13@intel.com> (raw)
In-Reply-To: <5621f6055ca641d89c0cd05c91f8b06c@intel.com>

> Much better. This version boots.  Machine check recovery works as well as it did before
> (user triggered machine checks are fine, kernel triggered ones are ok where they were
> before and still trigger infinite loops where they did before).

With these three patches:

https://lore.kernel.org/all/20210818002942.1607544-1-tony.luck@intel.com/

on top of your series the infinite loops are fixed (first patch).

Other two patches fix my write(2) test which does:

	ret = write(fd, buf, 512);

Where I have injected poison at some offset within "buf".

If the poison is at the start of buf I get ret == -1 with errno == -EFAULT.
If the poison is at a non-zero offset, the the bytes up to the poison
are written to the file and "ret" tells you how many were written.

-Tony 

      reply	other threads:[~2021-09-08 17:01 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08 13:29 [patch V3 00/20] x86/fpu: Clean up exception fixups and error handling in sigframe related code Thomas Gleixner
2021-09-08 13:29 ` [patch V3 01/20] x86/extable: Tidy up redundant handler functions Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 02/20] x86/extable: Get rid of redundant macros Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 03/20] x86/mce: Deduplicate exception handling Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 04/20] x86/mce: Get rid of stray semicolons Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 05/20] x86/extable: Rework the exception table mechanics Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 06/20] x86/extable: Provide EX_TYPE_DEFAULT_MCE_SAFE and EX_TYPE_FAULT_MCE_SAFE Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 07/20] x86/copy_mc: Use EX_TYPE_DEFAULT_MCE_SAFE for exception fixups Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 08/20] x86/fpu: Use EX_TYPE_FAULT_MCE_SAFE " Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 09/20] x86/extable: Remove EX_TYPE_FAULT from MCE safe fixups Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 10/20] x86/fpu/signal: Clarify exception handling in restore_fpregs_from_user() Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 11/20] x86/fpu: Dont use MCE safe fixups for writing FPU state to user space Thomas Gleixner
2021-09-08 13:29 ` [patch V3 12/20] x86/fpu/signal: Move header zeroing out of xsave_to_user_sigframe() Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 13/20] x86/fpu/signal: Move xstate clearing out of copy_fpregs_to_sigframe() Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 14/20] x86/fpu/signal: Change return type of copy_fpstate_to_sigframe() to boolean Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 15/20] x86/fpu/signal: Change return type of copy_fpregs_to_sigframe() helpers " Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-21 10:58   ` [patch V3 15/20] " Anders Roxell
2021-09-21 17:35     ` Nick Desaulniers
2021-09-22 18:23       ` Nick Desaulniers
2021-09-21 20:13     ` Thomas Gleixner
2021-09-22 19:42       ` Anders Roxell
2021-09-08 13:29 ` [patch V3 16/20] x86/signal: Change return type of restore_sigcontext() " Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 17/20] x86/fpu/signal: Change return type of fpu__restore_sig() " Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 18/20] x86/fpu/signal: Change return type of __fpu_restore_sig() " Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 19/20] x86/fpu/signal: Change return code of check_xstate_in_sigframe() " Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 13:29 ` [patch V3 20/20] x86/fpu/signal: Change return code of restore_fpregs_from_user() " Thomas Gleixner
2021-09-14 19:19   ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-09-08 15:57 ` [patch V3 00/20] x86/fpu: Clean up exception fixups and error handling in sigframe related code Luck, Tony
2021-09-08 17:01   ` Luck, Tony [this message]

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