Author: sbruno
Date: Thu Jan 12 16:24:10 2017
New Revision: 311986
URL: https://svnweb.freebsd.org/changeset/base/311986
Log:
Fix panic on mb_free_ext() due to NULL destructor.
This used to happen because of the SET_MBUF_DESTRUCTOR() called
on unregif.
Submitted by: Vincenzo Maffione <v.maffi...@gmail.com>
Modified:
head/sys/dev/netmap/netmap_generic.c
Modified: head/sys/dev/netmap/netmap_generic.c
==============================================================================
--- head/sys/dev/netmap/netmap_generic.c Thu Jan 12 16:22:28 2017
(r311985)
+++ head/sys/dev/netmap/netmap_generic.c Thu Jan 12 16:24:10 2017
(r311986)
@@ -165,12 +165,12 @@ nm_os_get_mbuf(struct ifnet *ifp, int le
* has a KASSERT(), checking that the mbuf dtor function is not NULL.
*/
+static void void_mbuf_dtor(struct mbuf *m, void *arg1, void *arg2) { }
+
#define SET_MBUF_DESTRUCTOR(m, fn) do { \
- (m)->m_ext.ext_free = (void *)fn; \
+ (m)->m_ext.ext_free = fn ? (void *)fn : (void *)void_mbuf_dtor; \
} while (0)
-static void void_mbuf_dtor(struct mbuf *m, void *arg1, void *arg2) { }
-
static inline struct mbuf *
nm_os_get_mbuf(struct ifnet *ifp, int len)
{
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