| Message ID | 20240305133853.2214268-1-kherbst@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/2] drm/nouveau: fix stale locked mutex in nouveau_gem_ioctl_pushbuf | expand |
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) {
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(-)