From: Linus Torvalds <torvalds@linux-foundation.org>
To: "Russell King (Oracle)" <linux@armlinux.org.uk>
Cc: Zizhi Wo <wozizhi@huaweicloud.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
jack@suse.com, brauner@kernel.org, hch@lst.de,
akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-arm-kernel@lists.infradead.org, yangerkun@huawei.com,
wangkefeng.wang@huawei.com, pangliyuan1@huawei.com,
xieyuanbin1@huawei.com
Subject: Re: [Bug report] hash_name() may cross page boundary and trigger sleep in RCU context
Date: Tue, 2 Dec 2025 14:07:25 -0800 [thread overview]
Message-ID: <CAHk-=wg4ZnsfpgXYL5qhjYDYo1Gnssz+VxnKZzHXMEmE7qrnQQ@mail.gmail.com> (raw)
In-Reply-To: <aS7e9CbQXS27sGcd@shell.armlinux.org.uk>
On Tue, 2 Dec 2025 at 04:43, Russell King (Oracle)
<linux@armlinux.org.uk> wrote:
>
> What I'm thinking is to address both of these by handling kernel space
> page faults (which will be permission or PTE-not-present) separately
> (not even build tested):
That patch looks sane to me.
But I also didn't build test it, just scanned it visually ;)
Linus
next prev parent reply other threads:[~2025-12-02 22:07 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-26 9:05 Zizhi Wo
2025-11-26 10:19 ` [RFC PATCH] vfs: Fix might sleep in load_unaligned_zeropad() with rcu read lock held Xie Yuanbin
2025-11-26 18:10 ` Al Viro
2025-11-26 18:48 ` Al Viro
2025-11-26 19:05 ` Russell King (Oracle)
2025-11-26 19:26 ` Al Viro
2025-11-26 19:51 ` Russell King (Oracle)
2025-11-26 20:02 ` Al Viro
2025-11-26 22:25 ` david laight
2025-11-26 23:51 ` Al Viro
2025-11-26 23:31 ` Russell King (Oracle)
2025-11-27 3:03 ` Xie Yuanbin
2025-11-27 7:20 ` Sebastian Andrzej Siewior
2025-11-27 11:20 ` Xie Yuanbin
2025-11-28 1:39 ` Xie Yuanbin
2025-11-26 20:42 ` Al Viro
2025-11-26 10:27 ` [Bug report] hash_name() may cross page boundary and trigger sleep in RCU context Zizhi Wo
2025-11-26 21:12 ` Linus Torvalds
2025-11-27 10:27 ` Will Deacon
2025-11-27 10:57 ` Russell King (Oracle)
2025-11-28 17:06 ` Linus Torvalds
2025-11-29 1:01 ` Zizhi Wo
2025-11-29 1:35 ` Linus Torvalds
2025-11-29 4:08 ` [Bug report] hash_name() may cross page boundary and trigger Xie Yuanbin
2025-11-29 9:08 ` Al Viro
2025-11-29 9:25 ` Xie Yuanbin
2025-11-29 9:44 ` Al Viro
2025-11-29 10:05 ` Xie Yuanbin
2025-11-29 10:45 ` david laight
2025-11-29 8:54 ` [Bug report] hash_name() may cross page boundary and trigger sleep in RCU context Al Viro
2025-12-01 2:08 ` Zizhi Wo
2025-11-29 2:18 ` [Bug report] hash_name() may cross page boundary and trigger Xie Yuanbin
2025-12-01 13:28 ` [Bug report] hash_name() may cross page boundary and trigger sleep in RCU context Will Deacon
2025-12-02 12:43 ` Russell King (Oracle)
2025-12-02 13:02 ` Xie Yuanbin
2025-12-02 22:07 ` Linus Torvalds [this message]
2025-12-03 1:48 ` Xie Yuanbin
2025-12-05 12:08 ` Russell King (Oracle)
2025-11-26 18:55 ` Al Viro
2025-11-27 2:24 ` Zizhi Wo
2025-11-29 3:37 ` Al Viro
2025-11-30 3:01 ` [RFC][alpha] saner vmalloc handling (was Re: [Bug report] hash_name() may cross page boundary and trigger sleep in RCU context) Al Viro
2025-11-30 11:32 ` david laight
2025-11-30 16:43 ` Al Viro
2025-11-30 18:14 ` Magnus Lindholm
2025-11-30 19:03 ` david laight
2025-11-30 20:31 ` Al Viro
2025-11-30 20:32 ` Al Viro
2025-11-30 22:16 ` Linus Torvalds
2025-11-30 23:37 ` Al Viro
2025-12-01 2:03 ` [Bug report] hash_name() may cross page boundary and trigger sleep in RCU context Zizhi Wo
2025-11-27 12:59 ` Will Deacon
2025-11-28 1:17 ` Zizhi Wo
2025-11-28 1:18 ` Zizhi Wo
2025-11-28 1:39 ` Zizhi Wo
2025-11-28 12:25 ` Will Deacon
2025-11-29 1:02 ` Zizhi Wo
2025-11-29 3:55 ` Al Viro
2025-12-01 2:38 ` Zizhi Wo
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='CAHk-=wg4ZnsfpgXYL5qhjYDYo1Gnssz+VxnKZzHXMEmE7qrnQQ@mail.gmail.com' \
--to=torvalds@linux-foundation.org \
--cc=akpm@linux-foundation.org \
--cc=brauner@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=hch@lst.de \
--cc=jack@suse.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux@armlinux.org.uk \
--cc=pangliyuan1@huawei.com \
--cc=wangkefeng.wang@huawei.com \
--cc=will@kernel.org \
--cc=wozizhi@huaweicloud.com \
--cc=xieyuanbin1@huawei.com \
--cc=yangerkun@huawei.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