From: sashiko-bot@kernel.org
To: "Donggeun Yoo" <donggeunyoo.kernel@gmail.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH] PCI/DOE: Fix double free of a duplicate feature's sysfs name
Date: Mon, 28 Sep 2026 03:56:58 +0000 [thread overview]
Message-ID: <20260928035658.F35BA1F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260928035035.252394-1-donggeunyoo.kernel@gmail.com>
> When a DOE feature is reported twice, sysfs_add_file_to_group() fails
> with -EEXIST for the second copy and pci_doe_sysfs_feature_populate()
> frees that attribute's name, but leaves the pointer in place.
> pci_doe_sysfs_feature_remove() frees every name again when the device
> is removed, or when a later feature fails to register, so the name is
> freed twice:
>
> BUG: KASAN: double-free in pci_doe_sysfs_feature_remove+0x117/0x1b0
> Call Trace:
> kfree+0x11a/0x420
> pci_doe_sysfs_feature_remove+0x117/0x1b0
> pci_doe_sysfs_teardown+0x90/0xf0
> pci_remove_bus_device+0x128/0x2e0
> pci_stop_and_remove_bus_device_locked+0x1d/0x30
> remove_store+0xd2/0xf0
>
> Leave the name to pci_doe_sysfs_feature_remove(), which already frees
> it for every entry.
>
> Fixes: 2311ab1820fe ("PCI/DOE: Expose DOE features via sysfs")
> Cc: stable@vger.kernel.org
> Assisted-by: LLM
> Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260928035035.252394-1-donggeunyoo.kernel@gmail.com?part=1
next prev parent reply other threads:[~2026-09-28 3:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 3:50 [PATCH] PCI/DOE: Fix double free of a duplicate feature's sysfs name Donggeun Yoo
2026-09-28 3:56 ` sashiko-bot [this message]
2026-09-28 5:19 ` Alistair
2026-09-28 5:32 ` Donggeun Yoo
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=20260928035658.F35BA1F000FF@smtp.kernel.org \
--to=sashiko-bot@kernel.org \
--cc=donggeunyoo.kernel@gmail.com \
--cc=linux-pci@vger.kernel.org \
--cc=sashiko-reviews@lists.linux.dev \
/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