From: "Luck, Tony" <tony.luck@intel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Jue Wang <juew@google.com>, Ding Hui <dinghui@sangfor.com.cn>,
"naoya.horiguchi@nec.com" <naoya.horiguchi@nec.com>,
"osalvador@suse.de" <osalvador@suse.de>,
"Song, Youquan" <youquan.song@intel.com>,
"huangcun@sangfor.com.cn" <huangcun@sangfor.com.cn>,
"x86@kernel.org" <x86@kernel.org>,
"linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v2 0/3] More machine check recovery fixes
Date: Wed, 18 Aug 2021 16:14:38 +0000 [thread overview]
Message-ID: <f5fafffacaa746dab99bec1b788383d4@intel.com> (raw)
In-Reply-To: <20210818002942.1607544-1-tony.luck@intel.com>
> Changes since v1:
> 1) Fix bug in kill_me_never() that forgot to clear p->mce_count so
> repeated recovery in the same task would trigger the panic for
> "Machine checks to different user pages"
> [Note to Jue Wang ... this *might* be why your test that injects
> two errors into the same buffer passed to a write(2) syscall
> failed with this message]
I recreated Jue's specific test today with uncorrected errors in two
pages passed to a write(2) syscall.
buf = alloc(2 pages);
inject(buf + 0x440);
inject*buf + 0x11c0);
n = write(fd, buf, 8K);
Result was that the write returned 0x440 (i.e. bytes written up to the
first poison location).
-Tony
prev parent reply other threads:[~2021-08-18 16:14 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-06 19:06 [PATCH 0/3] More machine check recovery fixes Tony Luck
2021-07-06 19:06 ` [PATCH 1/3] x86/mce: Change to not send SIGBUS error during copy from user Tony Luck
2021-07-06 19:06 ` [PATCH 2/3] x86/mce: Avoid infinite loop for copy from user recovery Tony Luck
2021-07-06 19:06 ` [PATCH 3/3] x86/mce: Drop copyin special case for #MC Tony Luck
2021-08-18 0:29 ` [PATCH v2 0/3] More machine check recovery fixes Tony Luck
2021-08-18 0:29 ` [PATCH v2 1/3] x86/mce: Avoid infinite loop for copy from user recovery Tony Luck
2021-08-20 17:31 ` Borislav Petkov
2021-08-20 18:59 ` Luck, Tony
2021-08-20 19:27 ` Borislav Petkov
2021-08-20 20:23 ` Luck, Tony
2021-08-21 4:51 ` Tony Luck
2021-08-21 21:51 ` Al Viro
2021-08-22 14:36 ` Borislav Petkov
2021-08-20 20:33 ` Luck, Tony
2021-08-22 14:46 ` Borislav Petkov
2021-08-23 15:24 ` Luck, Tony
2021-09-13 9:24 ` Borislav Petkov
2021-09-13 21:52 ` [PATCH v3] " Luck, Tony
2021-09-14 8:28 ` Borislav Petkov
2021-08-18 0:29 ` [PATCH v2 2/3] x86/mce: Change to not send SIGBUS error during copy from user Tony Luck
2021-09-21 7:52 ` [tip: ras/core] " tip-bot2 for Tony Luck
2021-08-18 0:29 ` [PATCH v2 3/3] x86/mce: Drop copyin special case for #MC Tony Luck
2021-09-20 9:13 ` Borislav Petkov
2021-09-20 16:18 ` Luck, Tony
2021-09-20 16:37 ` Borislav Petkov
2021-09-20 16:43 ` Luck, Tony
2021-09-21 7:52 ` [tip: ras/core] " tip-bot2 for Tony Luck
2021-08-18 16:14 ` Luck, Tony [this message]
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