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Make ng_ksocket fulfill lower protocol stack layers alignment requirements

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on platforms with strict alignment constraints.
This fixes kernel panics on arm and probably other architectures.

PR:		sparc64/80410
This commit is contained in:
Alexander Motin 2010-03-31 22:16:05 +00:00
parent 148ac1dacc
commit 5c100aeaad
1 changed files with 13 additions and 1 deletions
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14
sys/netgraph/ng_ksocket.c
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@ -902,12 +902,24 @@ ng_ksocket_rcvdata(hook_p hook, item_p item)
struct sockaddr *sa = NULL;
int error;
struct mbuf *m;
#ifdef ALIGNED_POINTER
struct mbuf *n;
#endif /* ALIGNED_POINTER */
struct sa_tag *stag;
/* Extract data */
NGI_GET_M(item, m);
NG_FREE_ITEM(item);
#ifdef ALIGNED_POINTER
if (!ALIGNED_POINTER(mtod(m, caddr_t), uint32_t)) {
n = m_defrag(m, M_NOWAIT);
if (n == NULL) {
m_freem(m);
return (ENOBUFS);
}
m = n;
}
#endif /* ALIGNED_POINTER */
/*
* Look if socket address is stored in packet tags.
* If sockaddr is ours, or provided by a third party (zero id),