From: Oleg Nesterov <oleg@redhat.com>
To: David Hildenbrand <david@redhat.com>
Cc: Pu Lehui <pulehui@huaweicloud.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
mhiramat@kernel.org, peterz@infradead.org,
akpm@linux-foundation.org, Liam.Howlett@oracle.com,
vbabka@suse.cz, jannh@google.com, pfalcato@suse.de,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
pulehui@huawei.com, Andrii Nakryiko <andrii@kernel.org>,
Jiri Olsa <jolsa@kernel.org>
Subject: Re: [RFC PATCH] mm/mmap: Fix uprobe anon page be overwritten when expanding vma during mremap
Date: Mon, 26 May 2025 18:29:41 +0200 [thread overview]
Message-ID: <20250526162940.GB4156@redhat.com> (raw)
In-Reply-To: <e6b657c6-98b9-4690-9a26-27db0fa7c794@redhat.com>
On 05/25, David Hildenbrand wrote:
>
> On 25.05.25 11:59, Oleg Nesterov wrote:
> >
> >OK. But do you see any reason why uprobe_mmap() should be ever called during
> >mremap() ?
>
> Only when growing a VMA: we might now cover a part with a uprobe, which we
> have take care of.
Ah, indeed, thank you...
But. What if mremap() expands and moves a VMA? it seems to me that in
this case uprobe_mmap() won't be called? I'll try to make the test-case
to check...
Oleg.
next prev parent reply other threads:[~2025-05-26 16:30 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-21 9:25 [RFC PATCH] mm/mmap: Fix uprobe anon page be overwritten when expanding vma during mremap Pu Lehui
2025-05-21 10:25 ` David Hildenbrand
2025-05-22 14:37 ` Pu Lehui
2025-05-22 15:14 ` David Hildenbrand
2025-05-26 14:52 ` Pu Lehui
2025-05-26 15:48 ` Oleg Nesterov
2025-05-26 18:46 ` David Hildenbrand
2025-05-27 11:42 ` Lorenzo Stoakes
2025-05-27 11:44 ` Lorenzo Stoakes
2025-05-27 13:39 ` Pu Lehui
2025-05-27 13:38 ` Pu Lehui
2025-05-28 9:03 ` David Hildenbrand
2025-05-29 16:07 ` Pu Lehui
2025-05-30 8:33 ` David Hildenbrand
2025-05-30 8:41 ` Lorenzo Stoakes
2025-05-30 8:50 ` David Hildenbrand
2025-05-30 9:03 ` Lorenzo Stoakes
2025-05-30 9:27 ` David Hildenbrand
2025-05-30 18:09 ` Oleg Nesterov
2025-05-30 18:34 ` David Hildenbrand
2025-05-30 22:48 ` Pu Lehui
2025-05-27 13:23 ` Pu Lehui
2025-05-21 13:13 ` Lorenzo Stoakes
2025-05-22 15:00 ` Pu Lehui
2025-05-22 15:18 ` Lorenzo Stoakes
2025-05-24 16:45 ` Oleg Nesterov
2025-05-24 21:45 ` David Hildenbrand
2025-05-25 9:59 ` Oleg Nesterov
2025-05-25 10:24 ` David Hildenbrand
2025-05-26 16:29 ` Oleg Nesterov [this message]
2025-05-26 17:38 ` Oleg Nesterov
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