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authorJulia Lawall <julia@diku.dk>2008-09-10 13:57:43 +0200
committerIngo Molnar <mingo@elte.hu>2008-09-10 14:03:49 +0200
commitf461a1d80c865e5ec4d24107adbab8b010b60e32 (patch)
tree049854c288effeb876c67e6b9cc7d3caaad6bc11 /arch/x86/kernel/kdebugfs.c
parentadee14b2e1557d0a8559f29681732d05a89dfc35 (diff)
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arch/x86/kernel/kdebugfs.c: introduce missing kfree
Error handling code following a kmalloc should free the allocated data. Note that at the point of the change, node has not yet been stored in d, so it is not affected by the existing cleanup code. 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,l; position p1,p2; expression *ptr != NULL; @@ ( if ((x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...)) == NULL) S | x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S ) <... when != x when != if (...) { <+...x...+> } x->f = E ...> ( 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> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/kdebugfs.c')
-rw-r--r--arch/x86/kernel/kdebugfs.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index f2d43bc75514..ff7d3b0124f1 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -139,6 +139,7 @@ static int __init create_setup_data_nodes(struct dentry *parent)
if (PageHighMem(pg)) {
data = ioremap_cache(pa_data, sizeof(*data));
if (!data) {
+ kfree(node);
error = -ENXIO;
goto err_dir;
}