11 lines
344 B
Diff
11 lines
344 B
Diff
--- sys/kern/uipc_mbuf2.c.orig
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+++ sys/kern/uipc_mbuf2.c
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@@ -216,7 +216,7 @@
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goto ok;
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}
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if ((off == 0 || offp) && M_LEADINGSPACE(n->m_next) >= hlen
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- && writable) {
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+ && writable && n->m_next->m_len >= tlen) {
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n->m_next->m_data -= hlen;
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n->m_next->m_len += hlen;
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bcopy(mtod(n, caddr_t) + off, mtod(n->m_next, caddr_t), hlen);
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