From: Tony Luck <tony.luck@intel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: "Jue Wang" <juew@google.com>, "Ding Hui" <dinghui@sangfor.com.cn>,
"HORIGUCHI NAOYA(堀口 直也)" <naoya.horiguchi@nec.com>,
"Oscar Salvador" <osalvador@suse.de>,
"Youquan Song" <youquan.song@intel.com>,
huangcun@sangfor.com.cn, X86-ML <x86@kernel.org>,
"Linux Edac Mailing List" <linux-edac@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 1/3] x86/mce: Avoid infinite loop for copy from user recovery
Date: Fri, 20 Aug 2021 21:51:41 -0700 [thread overview]
Message-ID: <CA+8MBb+M5JoDGONxZuMHZb8VU4DmG=zsv_0JuBhnzn6T=eSKEA@mail.gmail.com> (raw)
In-Reply-To: <20210820202346.GA1623796@agluck-desk2.amr.corp.intel.com>
On Fri, Aug 20, 2021 at 1:25 PM Luck, Tony <tony.luck@intel.com> wrote:
> Probably the same for the two different addresses case ... though I'm
> not 100% confident about that. There could be some ioctl() that peeks
> at two parts of a passed in structure, and the user might pass in a
> structure that spans across a page boundary with both pages poisoned.
> But that would only hit if the driver code ignored the failure of the
> first get_user() and blindly tried the second. So I'd count that as a
> critically bad driver bug.
Or maybe driver writers are just evil :-(
for (i = 0; i < len; i++) {
tx_wait(10);
get_user(dsp56k_host_interface.data.b[1], bin++);
get_user(dsp56k_host_interface.data.b[2], bin++);
get_user(dsp56k_host_interface.data.b[3], bin++);
}
-Tony
next prev parent reply other threads:[~2021-08-21 4:51 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210706190620.1290391-1-tony.luck@intel.com>
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 [this message]
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
2021-08-18 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
2021-08-18 16:14 ` [PATCH v2 0/3] More machine check recovery fixes Luck, Tony
2021-01-08 22:22 [PATCH 0/2] Fix infinite machine check loop in futex_wait_setup() Tony Luck
2021-01-11 21:44 ` [PATCH v2 0/3] " Tony Luck
2021-01-11 21:44 ` [PATCH v2 1/3] x86/mce: Avoid infinite loop for copy from user recovery Tony Luck
2021-01-11 22:11 ` Andy Lutomirski
2021-01-11 22:20 ` Luck, Tony
2021-01-12 17:00 ` Andy Lutomirski
2021-01-12 17:16 ` Luck, Tony
2021-01-12 17:21 ` Andy Lutomirski
2021-01-12 18:23 ` Luck, Tony
2021-01-12 18:57 ` Andy Lutomirski
2021-01-12 20:52 ` Luck, Tony
2021-01-12 22:04 ` Andy Lutomirski
2021-01-13 1:50 ` Luck, Tony
2021-01-13 4:15 ` Andy Lutomirski
2021-01-13 10:00 ` Borislav Petkov
2021-01-13 16:06 ` Luck, Tony
2021-01-13 16:19 ` Borislav Petkov
2021-01-13 16:32 ` Luck, Tony
2021-01-13 17:35 ` Borislav Petkov
2021-01-14 20:22 ` Borislav Petkov
2021-01-14 21:05 ` Luck, Tony
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CA+8MBb+M5JoDGONxZuMHZb8VU4DmG=zsv_0JuBhnzn6T=eSKEA@mail.gmail.com' \
--to=tony.luck@intel.com \
--cc=bp@alien8.de \
--cc=dinghui@sangfor.com.cn \
--cc=huangcun@sangfor.com.cn \
--cc=juew@google.com \
--cc=linux-edac@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=naoya.horiguchi@nec.com \
--cc=osalvador@suse.de \
--cc=x86@kernel.org \
--cc=youquan.song@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).