From: Karol Herbst <kherbst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Lyude Paul <lyude@redhat.com>, Danilo Krummrich <dakr@redhat.com>,
dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org,
Karol Herbst <kherbst@redhat.com>,
stable@vger.kernel.org
Subject: [PATCH v2 1/2] drm/nouveau: fix stale locked mutex in nouveau_gem_ioctl_pushbuf
Date: Tue, 5 Mar 2024 14:38:52 +0100 [thread overview]
Message-ID: <20240305133853.2214268-1-kherbst@redhat.com> (raw)
If VM_BIND is enabled on the client the legacy submission ioctl can't be
used, however if a client tries to do so regardless it will return an
error. In this case the clients mutex remained unlocked leading to a
deadlock inside nouveau_drm_postclose or any other nouveau ioctl call.
Fixes: b88baab82871 ("drm/nouveau: implement new VM_BIND uAPI")
Cc: Danilo Krummrich <dakr@redhat.com>
Cc: <stable@vger.kernel.org> # v6.6+
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240304183157.1587152-1-kherbst@redhat.com
---
drivers/gpu/drm/nouveau/nouveau_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
index 49c2bcbef1299..5a887d67dc0e8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -764,7 +764,7 @@ nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
return -ENOMEM;
if (unlikely(nouveau_cli_uvmm(cli)))
- return -ENOSYS;
+ return nouveau_abi16_put(abi16, -ENOSYS);
list_for_each_entry(temp, &abi16->channels, head) {
if (temp->chan->chid == req->channel) {
--
2.44.0
next reply other threads:[~2024-03-05 13:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-05 13:38 Karol Herbst [this message]
2024-03-05 13:38 ` [PATCH v2 2/2] drm/nouveau: move more missing UAPI bits Karol Herbst
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=20240305133853.2214268-1-kherbst@redhat.com \
--to=kherbst@redhat.com \
--cc=dakr@redhat.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lyude@redhat.com \
--cc=nouveau@lists.freedesktop.org \
--cc=stable@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 read-only IMAP folder(s) and NNTP newsgroup(s).