From: Xie Yuanbin <xieyuanbin1@huawei.com>
To: <ljs@kernel.org>, <linux@armlinux.org.uk>
Cc: <akpm@linux-foundation.org>, <david@kernel.org>,
<liam@infradead.org>, <liaohua4@huawei.com>,
<lilinjie8@huawei.com>, <linusw@kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
<mhocko@suse.com>, <rppt@kernel.org>, <sunnanyong@huawei.com>,
<surenb@google.com>, <vbabka@kernel.org>,
<wangkefeng.wang@huawei.com>, <xieyuanbin1@huawei.com>,
<xiqi2@huawei.com>
Subject: Re: [PATCH v3 1/2] ARM: mm: fix use-after-free in __do_user_fault() under CONFIG_DEBUG_USER
Date: Sat, 11 Jul 2026 16:13:03 +0800 [thread overview]
Message-ID: <20260711081303.5472-1-xieyuanbin1@huawei.com> (raw)
In-Reply-To: <alH4-zEWkSDK5EvK@lucifer>
On Sat, 11 Jul 2026 09:05:03 +0100, Lorenzo Stoakes wrote:
> OK given arm32 can't do any of the stuff that makes kernel faults an issue, and
> if it's certain you can't deadlock on mmap write lock for VMA or non-VMA ranges
> on user fault, then no need for the mmap write trylock, and just take the mmap
> write lock unconditionally for user faults, and no lock for kernel faults I
> guess?
Yes, that's exactly what I think. We are waiting for ARM's maintainer Russell King
to confirm, and then we will send out the new patch. :)
next prev parent reply other threads:[~2026-07-11 8:13 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-26 7:30 [PATCH v3 0/2] ARM: mm: fix use-after-free in show_pte() Qi Xi
2026-06-26 7:30 ` [PATCH v3 1/2] ARM: mm: fix use-after-free in __do_user_fault() under CONFIG_DEBUG_USER Qi Xi
2026-06-26 9:44 ` Russell King
2026-06-27 1:39 ` Qi Xi
2026-07-06 13:32 ` Xie Yuanbin
2026-07-07 11:48 ` Qi Xi
2026-07-07 11:57 ` Russell King
2026-07-07 12:47 ` Qi Xi
2026-07-07 12:47 ` Lorenzo Stoakes
2026-07-07 13:14 ` Xie Yuanbin
2026-07-07 13:20 ` Lorenzo Stoakes
2026-07-07 14:04 ` Xie Yuanbin
2026-07-07 15:34 ` Russell King
2026-07-10 2:32 ` Qi Xi
2026-07-11 7:27 ` Lorenzo Stoakes
2026-07-11 7:56 ` Xie Yuanbin
2026-07-11 8:05 ` Lorenzo Stoakes
2026-07-11 8:13 ` Xie Yuanbin [this message]
2026-07-07 12:46 ` Lorenzo Stoakes
2026-07-07 13:35 ` Xie Yuanbin
2026-07-11 6:43 ` Lorenzo Stoakes
2026-06-26 7:30 ` [PATCH v3 2/2] ARM: mm: protect show_pte() in do_DataAbort() fallback path Qi Xi
2026-06-26 9:45 ` Russell King
2026-06-26 10:16 ` Xie Yuanbin
2026-06-26 12:37 ` Russell King
2026-06-27 1:22 ` Xie Yuanbin
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