There's double-free bug in
drivers/isdn/i4l/isdn_net.c::isdn_net_writebuf_skb().
If isdn_writebuf_skb_stub() doesn't handle the entire skb, then it will
have freed the skb that was passed to it and when the code then jumps
to the error label it'll result in a double free of the skb.
The easy way to fix this is to insert an assignment of skb = NULL in the
'if' following the call to isdn_writebuf_skb_stub() so that when the code
at the error label calls dev_kfree_skb(skb); the skb will be NULL and
nothing will happen since dev_kfree_skb() just does a return if passed a
NULL.
Signed-off-by: Jesper Juhl <[email protected]>
---
drivers/isdn/i4l/isdn_net.c | 1 +
1 files changed, 1 insertion(+)
--- linux-2.6.18-rc4-orig/drivers/isdn/i4l/isdn_net.c 2006-08-11 00:10:55.000000000 +0200
+++ linux-2.6.18-rc4/drivers/isdn/i4l/isdn_net.c 2006-08-12 22:39:56.000000000 +0200
@@ -1023,6 +1023,7 @@ void isdn_net_writebuf_skb(isdn_net_loca
if (ret != len) {
/* we should never get here */
printk(KERN_WARNING "%s: HL driver queue full\n", lp->name);
+ skb = NULL;
goto error;
}
-
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