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authorJulia Lawall <julia@diku.dk>2009-08-08 02:26:10 +0200
committerJiri Kosina <jkosina@suse.cz>2009-08-08 02:26:10 +0200
commita809dda0369ae6157f7bcd3e704b857d43704cbd (patch)
tree075488e5c5d8d34e4b5405521095ba9b3947c20d /drivers/hid
parent55dba52458a11126ff4445b5b94ebde03afcf47a (diff)
downloadlinux-a809dda0369ae6157f7bcd3e704b857d43704cbd.tar.bz2
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.c1
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;