linux-kernel - [PATCH] staging: mmal-vchiq: clear redundant item named bulk

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Wed, 16 Mar 2022 01:24:12 +0800
From:   xkernel.wang@...mail.com
To:     gregkh@...uxfoundation.org, dan.carpenter@...cle.com,
        nsaenz@...nel.org
Cc:     bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Xiaoke Wang <xkernel.wang@...mail.com>
Subject: [PATCH] staging: mmal-vchiq: clear redundant item named bulk_scratch

From: Xiaoke Wang <xkernel.wang@...mail.com>

bulk_scratch is not used anywhere and the original allocation of it
does not have proper check.
Deleting it directly seems to be a good choice.

Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
---
 drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
index 76d3f03..6615c7a 100644
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -168,9 +168,6 @@ struct vchiq_mmal_instance {
 	/* ensure serialised access to service */
 	struct mutex vchiq_mutex;
 
-	/* vmalloc page to receive scratch bulk xfers into */
-	void *bulk_scratch;
-
 	struct idr context_map;
 	/* protect accesses to context_map */
 	struct mutex context_map_lock;
@@ -1847,8 +1844,6 @@ int vchiq_mmal_finalise(struct vchiq_mmal_instance *instance)
 	flush_workqueue(instance->bulk_wq);
 	destroy_workqueue(instance->bulk_wq);
 
-	vfree(instance->bulk_scratch);
-
 	idr_destroy(&instance->context_map);
 
 	kfree(instance);
@@ -1908,7 +1903,6 @@ int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
 
 	mutex_init(&instance->vchiq_mutex);
 
-	instance->bulk_scratch = vmalloc(PAGE_SIZE);
 	instance->vchiq_instance = vchiq_instance;
 
 	mutex_init(&instance->context_map_lock);
@@ -1939,7 +1933,6 @@ int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
 	vchiq_close_service(instance->service_handle);
 	destroy_workqueue(instance->bulk_wq);
 err_free:
-	vfree(instance->bulk_scratch);
 	kfree(instance);
 err_shutdown_vchiq:
 	vchiq_shutdown(vchiq_instance);
--