From: sashiko-bot@kernel.org
To: "Mohamad Raizudeen" <raizudeen.kerneldev@gmail.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH v2] PCI: quirks: Fix out-of-bounds MMIO read in nvme_disable_and_flr()
Date: Thu, 03 Sep 2026 04:09:54 +0000 [thread overview]
Message-ID: <20260903040954.E53AB1F000E9@smtp.kernel.org> (raw)
In-Reply-To: <20260903040049.5460-1-raizudeen.kerneldev@gmail.com>
> In nvme_disable_and_flr(), the PCI bar is mapped using
> NVME_REG_CC + sizeof(cfg) which is (0x14 + 4 = 0x18 bytes)
>
> However, the function later reads the controller status from
> NVME_REG_CSTS - offset 0x1C, which is outside the mapped 0x18 byte
> boundary. Reading past the mapped MMIO region is undefined behavior and
> can return invalid data.
>
> Fix this by increasing the mapping size to include NVME_REG_CSTS.
>
> Fixes: ffb0863426eb9 ("PCI: Disable Samsung SM961/PM961 NVMe before FLR")
> Signed-off-by: Mohamad Raizudeen <raizudeen.kerneldev@gmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260903040049.5460-1-raizudeen.kerneldev@gmail.com?part=1
next prev parent reply other threads:[~2026-09-03 4:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-03 4:00 [PATCH v2] PCI: quirks: Fix out-of-bounds MMIO read in nvme_disable_and_flr() Mohamad Raizudeen
2026-09-03 4:09 ` sashiko-bot [this message]
2026-09-03 14:34 ` Alex Williamson
2026-09-03 15:32 ` Mohamad Raizudeen
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=20260903040954.E53AB1F000E9@smtp.kernel.org \
--to=sashiko-bot@kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=raizudeen.kerneldev@gmail.com \
--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 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.