From: Julia Lawall <julia@diku.dk>
Date: Wed, 27 Oct 2010 22:33:28 +0000 (-0700)
Subject: drivers/video/gbefb.c: eliminate memory leak
X-Git-Tag: v2.6.37-rc1~85^2~105
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f35691062a138484b51bf53b36ae8a4495d8fb91;p=pandora-kernel.git

drivers/video/gbefb.c: eliminate memory leak

This code is preceded by a call to framebuffer_alloc, which allocates
memory, so this memory should be freed before leaving the function in an
error case.  out_release_framebuffer just frees the frame buffer and
returns.

A simplified version of the semantic match that finds this problem is:
(http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
local idexpression x;
expression E;
identifier f1;
iterator I;
@@

x = framebuffer_alloc(...);
<... when != x
     when != true (x == NULL || ...)
     when != if (...) { <+...x...+> }
     when != I (...) { <+...x...+> }
(
 x == NULL
|
 x == E
|
 x->f1
)
...>
* return ...;
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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