From: Oleg Nesterov <oleg@redhat.com>
To: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Pu Lehui <pulehui@huaweicloud.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
Subject: Re: [RFC PATCH v2 1/2] mm/mremap: Fix uprobe anon page be overwritten when expanding vma during mremap
Date: Tue, 27 May 2025 17:17:15 +0200 [thread overview]
Message-ID: <20250527151715.GC8333@redhat.com> (raw)
In-Reply-To: <cd02ea34-0675-4324-aa84-2696e834d922@lucifer.local>
On 05/27, Lorenzo Stoakes wrote:
>
> I am by the way assuming that uprobes work by installing a special PTE at
> page offset 0 and only in the case where there is something installed here
> do we need to worry.
perhaps I misunderstood you but no...
Basically, we have uprobe_register(struct inode *inode, loff_t offset, ...).
If / when a process mmaps this inode/file and the (new) VMA includes this offset,
we need to call uprobe_mmap() to install the breakpoint at the virtual address
which corresponds to this offset.
Oleg.
next prev parent reply other threads:[~2025-05-27 15:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-27 13:23 [RFC PATCH v2 0/2] Fix uprobe anon page be overwritten during mremap Pu Lehui
2025-05-27 13:23 ` [RFC PATCH v2 1/2] mm/mremap: Fix uprobe anon page be overwritten when expanding vma " Pu Lehui
2025-05-27 13:34 ` Lorenzo Stoakes
2025-05-27 15:17 ` Oleg Nesterov [this message]
2025-05-27 15:27 ` Lorenzo Stoakes
2025-05-27 15:29 ` Lorenzo Stoakes
2025-05-27 16:29 ` Pu Lehui
2025-05-27 14:23 ` Oleg Nesterov
2025-05-27 16:32 ` Pu Lehui
2025-05-27 16:37 ` Lorenzo Stoakes
2025-05-27 16:52 ` Pu Lehui
2025-05-27 17:20 ` Oleg Nesterov
2025-05-29 15:09 ` Pu Lehui
2025-05-29 15:12 ` Lorenzo Stoakes
2025-05-27 15:30 ` Oleg Nesterov
2025-05-27 15:33 ` Lorenzo Stoakes
2025-05-27 15:52 ` Oleg Nesterov
2025-05-27 16:41 ` Pu Lehui
2025-05-27 16:35 ` Pu Lehui
2025-05-27 13:23 ` [RFC PATCH v2 2/2] mm/mremap: Expose abnormal new_pte during move_ptes Pu Lehui
2025-05-27 14:24 ` Oleg Nesterov
2025-05-27 17:57 ` kernel test robot
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=20250527151715.GC8333@redhat.com \
--to=oleg@redhat.com \
--cc=Liam.Howlett@oracle.com \
--cc=akpm@linux-foundation.org \
--cc=jannh@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lorenzo.stoakes@oracle.com \
--cc=mhiramat@kernel.org \
--cc=peterz@infradead.org \
--cc=pfalcato@suse.de \
--cc=pulehui@huawei.com \
--cc=pulehui@huaweicloud.com \
--cc=vbabka@suse.cz \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.