D41229.diff
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	diff --git a/sys/netsmb/smb_rq.c b/sys/netsmb/smb_rq.c
	--- a/sys/netsmb/smb_rq.c
	+++ b/sys/netsmb/smb_rq.c
	@@ -425,12 +425,18 @@
	smb_t2_placedata(struct mbuf *mtop, u_int16_t offset, u_int16_t count,
	struct mdchain *mdp)
	{
	- struct mbuf m, m0;
	+ struct mbuf *m0;
	int len;

	+ len = m_length(mtop, NULL);
	+ if (offset + count > len)
	+ return (EPROTO);
	+
	m0 = m_split(mtop, offset, M_WAITOK);
	- len = m_length(m0, &m);
	- m->m_len -= len - count;
	+ if (len != offset + count) {
	+ len -= offset + count;
	+ m_adj(m0, -len);
	+ }
	if (mdp->md_top == NULL) {
	md_initm(mdp, m0);
	} else