diff options
| author | Julia Lawall <julia@diku.dk> | 2009-08-08 04:26:10 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2009-08-08 04:26:10 +0400 |
| commit | a809dda0369ae6157f7bcd3e704b857d43704cbd (patch) | |
| tree | 075488e5c5d8d34e4b5405521095ba9b3947c20d /drivers/hid | |
| parent | 55dba52458a11126ff4445b5b94ebde03afcf47a (diff) | |
| download | linux-a809dda0369ae6157f7bcd3e704b857d43704cbd.tar.xz | |
HID: fix memory leak on error patch in debug code
Error handling code following a kzalloc should free the allocated data.
The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,f1,l;
position p1,p2;
expression *ptr != NULL;
@@
x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
when != if (...) { <+...x...+> }
(
x->f1 = E
|
(x->f1 == NULL || ...)
|
f(...,x->f1,...)
)
...>
(
return \(0\|<+...x...+>\|ptr\);
|
return@p2 ...;
)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-debug.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c index a331a1821e85..06e87dc77796 100644 --- a/drivers/hid/hid-debug.c +++ b/drivers/hid/hid-debug.c @@ -909,6 +909,7 @@ static int hid_debug_events_open(struct inode *inode, struct file *file) if (!(list->hid_debug_buf = kzalloc(sizeof(char) * HID_DEBUG_BUFSIZE, GFP_KERNEL))) { err = -ENOMEM; + kfree(list); goto out; } list->hdev = (struct hid_device *) inode->i_private; |