From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Airlie <airlied@linux.ie>,
Markus Elfring <elfring@users.sourceforge.net>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
kernel-janitors@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [patch] drm/savage: dereferencing an error pointer
Date: Wed, 12 Oct 2016 09:22:27 +0300 [thread overview]
Message-ID: <20161012062227.GU12841@mwanda> (raw)
A recent cleanup changed the kmalloc() + copy_from_user() to
memdup_user() but the error handling wasn't updated so we might call
kfree(-EFAULT) and crash.
Fixes: a6e3918bcdb1 ('GPU-DRM-Savage: Use memdup_user() rather than duplicating')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/gpu/drm/savage/savage_state.c b/drivers/gpu/drm/savage/savage_state.c
index 3dc0d8f..2db89be 100644
--- a/drivers/gpu/drm/savage/savage_state.c
+++ b/drivers/gpu/drm/savage/savage_state.c
@@ -1004,6 +1004,7 @@ int savage_bci_cmdbuf(struct drm_device *dev, void *data, struct drm_file *file_
kvb_addr = memdup_user(cmdbuf->vb_addr, cmdbuf->vb_size);
if (IS_ERR(kvb_addr)) {
ret = PTR_ERR(kvb_addr);
+ kvb_addr = NULL;
goto done;
}
cmdbuf->vb_addr = kvb_addr;
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next reply other threads:[~2016-10-12 6:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-12 6:22 Dan Carpenter [this message]
2016-10-12 11:12 ` [patch] drm/savage: dereferencing an error pointer SF Markus Elfring
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=20161012062227.GU12841@mwanda \
--to=dan.carpenter@oracle.com \
--cc=airlied@linux.ie \
--cc=daniel.vetter@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=elfring@users.sourceforge.net \
--cc=kernel-janitors@vger.kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).