linux-kernel - [PATCH 5.3 125/193] drm/v3d: Fix memory leak in v3d_submit_cl

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Date:   Mon, 11 Nov 2019 19:28:27 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Eric Anholt <eric@...olt.net>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.3 125/193] drm/v3d: Fix memory leak in v3d_submit_cl_ioctl

From: Navid Emamdoost <navid.emamdoost@...il.com>

[ Upstream commit 29cd13cfd7624726d9e6becbae9aa419ef35af7f ]

In the impelementation of v3d_submit_cl_ioctl() there are two memory
leaks. One is when allocation for bin fails, and the other is when bin
initialization fails. If kcalloc fails to allocate memory for bin then
render->base should be put. Also, if v3d_job_init() fails to initialize
bin->base then allocated memory for bin should be released.

Fixes: a783a09ee76d ("drm/v3d: Refactor job management.")
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
Reviewed-by: Eric Anholt <eric@...olt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20191021185250.26130-1-navid.emamdoost@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/v3d/v3d_gem.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 27e0f87075d96..4dc7e38c99c7c 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -555,13 +555,16 @@ v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
 
 	if (args->bcl_start != args->bcl_end) {
 		bin = kcalloc(1, sizeof(*bin), GFP_KERNEL);
-		if (!bin)
+		if (!bin) {
+			v3d_job_put(&render->base);
 			return -ENOMEM;
+		}
 
 		ret = v3d_job_init(v3d, file_priv, &bin->base,
 				   v3d_job_free, args->in_sync_bcl);
 		if (ret) {
 			v3d_job_put(&render->base);
+			kfree(bin);
 			return ret;
 		}
 
-- 
2.20.1