From 8d34e7d6f38fce1c7e595404295494cd1eaba3eb Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Tue, 24 Aug 2010 04:38:33 +0000 Subject: [PATCH] drivers/net/irda: Eliminate memory leak dev_alloc_skb allocates some memory, so that memory should be freed before leaving the function in an error case. Corrected some typos in a nearby comment as well. A simplified version of the semantic match that finds this problem is: (http://coccinelle.lip6.fr/) // @r exists@ local idexpression x; expression E; identifier f1; iterator I; @@ x = dev_alloc_skb(...); <... when != x when != true (x == NULL || ...) when != if (...) { <+...x...+> } when != I (...) { <+...x...+> } ( x == NULL | x == E | x->f1 ) ...> * return ...; // Signed-off-by: Julia Lawall Signed-off-by: David S. Miller --- drivers/net/irda/via-ircc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c index b0a6cd815be..67c0ad42d81 100644 --- a/drivers/net/irda/via-ircc.c +++ b/drivers/net/irda/via-ircc.c @@ -1182,12 +1182,13 @@ F01_E */ skb = dev_alloc_skb(len + 1 - 4); /* - * if frame size,data ptr,or skb ptr are wrong ,the get next + * if frame size, data ptr, or skb ptr are wrong, then get next * entry. */ if ((skb == NULL) || (skb->data == NULL) || (self->rx_buff.data == NULL) || (len < 6)) { self->netdev->stats.rx_dropped++; + kfree_skb(skb); return TRUE; } skb_reserve(skb, 1);