It is the same issue but the root cause is unclear. There is much code
that does assumes ifma_protospec might be NULL and checks for it. In my
case (creating a wlan ifnet and then destroying it on eject) the patch
below is sufficient. I don't care to dig right now to understand how
this stuff is supposed to work; it should be clear from comments etc but
the code is lacking.
Sam
Coleman Kane wrote:
The crash that I am seeing (using if_ndis) occurs in igmp_fasttimo...
This patch doesn't fix that, I'll get more info as soon as I can.
On Sat, 2009-03-14 at 14:06 -0700, Sam Leffler wrote:
This patches avoids the crash. Not sure how ifma_protospec is supposed
to be handled so I'm not committing it.
Sam
plain text document attachment (mcast.patch)
Index: in.c
===================================================================
--- in.c (revision 189750)
+++ in.c (working copy)
@@ -1040,7 +1040,8 @@
*/
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
- if (ifma->ifma_addr->sa_family != AF_INET)
+ if (ifma->ifma_addr->sa_family != AF_INET ||
+ ifma->ifma_protospec == NULL)
continue;
inm = (struct in_multi *)ifma->ifma_protospec;
LIST_INSERT_HEAD(&purgeinms, inm, inm_link);
Index: igmp.c
===================================================================
--- igmp.c (revision 189750)
+++ igmp.c (working copy)
@@ -623,7 +623,8 @@
if (igi->igi_version == IGMP_VERSION_3) {
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
- if (ifma->ifma_addr->sa_family != AF_INET)
+ if (ifma->ifma_addr->sa_family != AF_INET ||
+ ifma->ifma_protospec == NULL)
continue;
inm = (struct in_multi *)ifma->ifma_protospec;
if (inm->inm_state == IGMP_LEAVING_MEMBER) {
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