linux-kernel - [PATCH] remoteproc: warn on kick missing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200206055419.15897-1-NShubin@topcon.com>
Date:   Thu,  6 Feb 2020 08:54:19 +0300
From:   Nikita Shubin <NShubin@...con.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     NShubin@...con.com, Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] remoteproc: warn on kick missing

.kick method not set in rproc_ops will result in:

8<--- cut here ---
Unable to handle kernel NULL pointer dereference

in rproc_virtio_notify, after firmware loading.

At least a warning needed on attempt to call missing method.

Signed-off-by: Nikita Shubin <NShubin@...con.com>
---
 drivers/remoteproc/remoteproc_virtio.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index 8c07cb2ca8ba..77a81f331e3f 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -32,6 +32,12 @@ static bool rproc_virtio_notify(struct virtqueue *vq)

        dev_dbg(&rproc->dev, "kicking vq index: %d\n", notifyid);

+       if (unlikely(rproc->ops->kick == NULL)) {
+               WARN_ONCE(rproc->ops->kick == NULL, ".kick method not defined for %s",
+                       rproc->name);
+               return false;
+       }
+
        rproc->ops->kick(rproc, notifyid);
        return true;
 }
--
2.24.1

Confidentiality Notice: This message (including attachments) is a private communication solely for use of the intended recipient(s). If you are not the intended recipient(s) or believe you received this message in error, notify the sender immediately and then delete this message. Any other use, retention, dissemination or copying is prohibited and may be a violation of law, including the Electronic Communication Privacy Act of 1986.   нн