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Wed, 4 Nov 2026 19:16:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793819804; bh=iSk3nsArFOOtW91DExIIvIg+E3fTnIkI1uYFn4dT7G8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=adc5P9d8MahDP5MWnF8/BQZpdhwQF+Ch+DamqvSkAjn9rCUlBnkqECo/i8i5m6rCU r+0D3t4BrnoadvsSIYVAap135Zl9/uPV+3cWE1MIZO02KbRYUYm6qut6Iw4ZTKqOu/ 6k7TrsWTmBmMQUM3tHfS92Olrwro6VG7uRQk7JNC9KNK3inBXn1gscAHaKpctq+lkz NHgRnuuGNNngzWx7kkuO/bS69mOTmSTRK/+7SYlvkts5zOYpp6/1gj+SaDwhe5nUBd NQB1zsZF5ExMRUSJm8geywWpAxhsrbuzBIhJsIT/iETtc8kHozEESlyxMXTZO60F+g m408MmhemLThg== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever , stable@vger.kernel.org Subject: [PATCH RESEND v2 02/51] scsi: esas2r: don't copy kernel pointers out in EXPRESS_IOCTL_GET_MOD_INFO Date: Wed, 4 Nov 2026 20:16:30 +0100 Message-ID: <20261104-work-procfs-bugfixes-v2-2-021c84d852e0@kernel.org> In-Reply-To: <20261104-work-procfs-bugfixes-v2-0-021c84d852e0@kernel.org> References: <20261104-work-procfs-bugfixes-v2-0-021c84d852e0@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1380; i=brauner@kernel.org; h=from:subject:message-id; bh=dmwAod4+27NCncmw2oz8APM07k66EUOhHcJdusbTjjg=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS9bjzbuC42lkN5rrFaxyvfJQdiNbQZ7W/e2Jquu5RPe /ZM3ftRHaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABNpfM3wzy5cJTFdotRbNPeq 5U63fQ+S03+85HippbBf44binOdz1BgZPlpuOyXM5rh4Ucv0N+t5PzZYf39meEdz+QFRtsctyxa 1cQAA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 EXPRESS_IOCTL_GET_MOD_INFO fills in the addresses of the adapter, its pci_dev and its Scsi_Host and copies the whole struct back to userspace. Nothing in userspace can do anything with those addresses, and the ioctl is reachable through /proc/scsi/esas2r/ATTONode, which is created with mode 0444. Only pass the host number. Fixes: 26780d9e12ed ("[SCSI] esas2r: ATTO Technology ExpressSAS 6G SAS/SATA RAID Adapter Driver") Cc: stable@vger.kernel.org Signed-off-by: Christian Brauner (Amutable) --- drivers/scsi/esas2r/esas2r_ioctl.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/esas2r/esas2r_ioctl.c b/drivers/scsi/esas2r/esas2r_ioctl.c index 3f7c1d131ec3..c93d9265e100 100644 --- a/drivers/scsi/esas2r/esas2r_ioctl.c +++ b/drivers/scsi/esas2r/esas2r_ioctl.c @@ -1468,9 +1468,10 @@ int esas2r_ioctl_handler(void *hostdata, unsigned int cmd, void __user *arg) case EXPRESS_IOCTL_GET_MOD_INFO: - ioctl->data.modinfo.adapter = a; - ioctl->data.modinfo.pci_dev = a->pcid; - ioctl->data.modinfo.scsi_host = a->host; + /* these are kernel pointers, userspace has no use for them */ + ioctl->data.modinfo.adapter = NULL; + ioctl->data.modinfo.pci_dev = NULL; + ioctl->data.modinfo.scsi_host = NULL; ioctl->data.modinfo.host_no = a->host->host_no; break; -- 2.53.0