linux-kernel - [PATCH] drm/i915: Fix an error hanfling path in 'i915_gem_do

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 for Android: free password hash cracker in your pocket

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

Date:   Tue,  4 Jul 2017 07:55:15 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     daniel.vetter@...el.com, jani.nikula@...ux.intel.com,
        airlied@...ux.ie
Cc:     intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] drm/i915: Fix an error hanfling path in 'i915_gem_do_execbuffer'

if 'eb_create()' fails, we must release some resources as done in all other
error handling paths of this function.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
This patch is just a guess based on surrounding gotos and function names.
(i.e. 'get_unused_fd_flags()' and 'put_unused_fd()')
---
 drivers/gpu/drm/i915/i915_gem_execbuffer.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 9337446f1068..0746b352f820 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -2180,8 +2180,9 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 		}
 	}
 
-	if (eb_create(&eb))
-		return -ENOMEM;
+	err = eb_create(&eb);
+	if (err)
+		goto err_put_unused_fd;
 
 	/*
 	 * Take a local wakeref for preparing to dispatch the execbuf as
@@ -2340,6 +2341,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 err_rpm:
 	intel_runtime_pm_put(eb.i915);
 	eb_destroy(&eb);
+err_put_unused_fd:
 	if (out_fence_fd != -1)
 		put_unused_fd(out_fence_fd);
 err_in_fence:
-- 
2.11.0