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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>
This commit is contained in:
Julia Lawall 2010-10-27 15:33:28 -07:00 committed by Linus Torvalds
parent f11b478d46
commit f35691062a
1 changed files with 4 additions and 2 deletions
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6
drivers/video/gbefb.c
View File

@ -1143,8 +1143,10 @@ static int __devinit gbefb_probe(struct platform_device *p_dev)
return -ENOMEM; return -ENOMEM;
#ifndef MODULE #ifndef MODULE
if (fb_get_options("gbefb", &options)) if (fb_get_options("gbefb", &options)) {
return -ENODEV; ret = -ENODEV;
goto out_release_framebuffer;
}
gbefb_setup(options); gbefb_setup(options);
#endif #endif