linux-kernel - [PATCH 4.5 1/1] revert commit 2c1f6951a8 videobuf2-v4l2

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>] [day] [month] [year] [list]

Message-ID: <6fcbf0e7-7c19-3574-9a8a-dc204195bfa1@laposte.net>
Date:	Thu, 12 May 2016 23:47:37 +0200
From:	Barto <mister.freeman@...oste.net>
To:	linux-kernel@...r.kernel.org
Cc:	gregkh@...uxfoundation.org, mchehab@....samsung.com
Subject: [PATCH 4.5 1/1] revert commit 2c1f6951a8 videobuf2-v4l2

since kernel 4.5.3 a severe bug has been introduced with commit
2c1f6951a8a82e6de0d82b1158b5e493fc6c54ab ( [media] videobuf2-v4l2:
Verify planes array in buffer dequeueing ),

a system freeze will occur with TV cards ( DVB-T ), for example with
"leadtek winfast DTV1000T", "leadtek winfast DTV1800H", "Avermedia" and
many others,

https://bugzilla.kernel.org/show_bug.cgi?id=118061

one quick fix is to revert this commit

--- a/drivers/media/v4l2-core/videobuf2-v4l2.c    2016-05-12
06:14:24.000000000 +0200
+++ b/drivers/media/v4l2-core/videobuf2-v4l2.c    2016-05-12
06:21:16.773477390 +0200
@@ -74,10 +74,6 @@
     return 0;
 }
 
-static int __verify_planes_array_core(struct vb2_buffer *vb, const void
*pb)
-{
-    return __verify_planes_array(vb, pb);
-}
 
 /**
  * __verify_length() - Verify that the bytesused value for each plane
fits in
@@ -442,7 +438,6 @@
 }
 
 static const struct vb2_buf_ops v4l2_buf_ops = {
-    .verify_planes_array    = __verify_planes_array_core,
     .fill_user_buffer    = __fill_v4l2_buffer,
     .fill_vb2_buffer    = __fill_vb2_buffer,
     .copy_timestamp        = __copy_timestamp,