From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: syzbot <syzbot@kernel.org>
Cc: syzkaller-bugs@googlegroups.com, Marco Elver <elver@google.com>,
Yehezkel Bernat <YehezkelShB@gmail.com>,
Andreas Noever <andreas.noever@gmail.com>,
linux-usb@vger.kernel.org, Mika Westerberg <westeri@kernel.org>,
linux-kernel@vger.kernel.org, syzbot@lists.linux.dev
Subject: Re: [PATCH] thunderbolt: Validate BAR 0 resource type and size
Date: Wed, 26 Aug 2026 06:39:29 +0200 [thread overview]
Message-ID: <20260826043929.GM893316@black.igk.intel.com> (raw)
In-Reply-To: <9e0d4fdc-4e1d-4195-80c0-7a70d34d1fc2@mail.kernel.org>
Hi,
On Tue, Aug 25, 2026 at 04:09:37PM +0000, syzbot wrote:
> From: Marco Elver <elver@google.com>
>
> The thunderbolt driver can crash with a page fault if it binds to an
> arbitrary PCI device (e.g., via sysfs driver_override) that has an I/O port
> BAR at index 0 instead of an MMIO BAR.
Well, if you bind it to a random PCIe device you get what you asked for.
This is specifically the reason we have the PCI IDs and the like in the
drivers. Anything outside of that you need to know what you are doing.
next prev parent reply other threads:[~2026-08-26 4:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-25 16:09 [PATCH] thunderbolt: Validate BAR 0 resource type and size syzbot
2026-08-26 4:39 ` Mika Westerberg [this message]
2026-08-26 6:08 ` Greg KH
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