From 23b904f35128f3c596831cc3320bab1f2db81f60 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 8 Feb 2009 17:00:49 -0800 Subject: [PATCH] drivers/isdn: introduce missing kfree Error handling code following a kmalloc should free the allocated data. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @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) // Signed-off-by: Julia Lawall Signed-off-by: David S. Miller --- drivers/isdn/hardware/mISDN/hfcmulti.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c index 595ba8eb4a07..0b28141e43bf 100644 --- a/drivers/isdn/hardware/mISDN/hfcmulti.c +++ b/drivers/isdn/hardware/mISDN/hfcmulti.c @@ -4599,6 +4599,7 @@ init_e1_port(struct hfc_multi *hc, struct hm_map *m) printk(KERN_ERR "%s: no memory for coeffs\n", __func__); ret = -ENOMEM; + kfree(bch); goto free_chan; } bch->nr = ch; @@ -4767,6 +4768,7 @@ init_multi_port(struct hfc_multi *hc, int pt) printk(KERN_ERR "%s: no memory for coeffs\n", __func__); ret = -ENOMEM; + kfree(bch); goto free_chan; } bch->nr = ch + 1; -- 2.30.2