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| author |   cmetz <cmetz@openbsd.org> | 1999-05-14 02:05:42 +0000 |
|---|---|---|
| committer | cmetz <cmetz@openbsd.org> | 1999-05-14 02:05:42 +0000 |
| commit | 81d1a49229832652bd337a8736b9556ff2514bb6 (patch) | |
| tree | 97fc56569b73d552de7e15740087fbebf4074e8d | |
| parent | sync (diff) | |
| download | wireguard-openbsd-81d1a49229832652bd337a8736b9556ff2514bb6.tar.xz wireguard-openbsd-81d1a49229832652bd337a8736b9556ff2514bb6.zip | |
m_zero will no longer zero the contents of a cluster if there's an alias to it.
(TCP uses cluster mbuf aliases for retransmission, and this would cause your
data to get retransmitted zeroed-out)
| -rw-r--r-- | sys/kern/uipc_mbuf.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c index f83ccb3ef41..8caae143a33 100644 --- a/sys/kern/uipc_mbuf.c +++ b/sys/kern/uipc_mbuf.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uipc_mbuf.c,v 1.10 1999/05/12 21:11:40 ho Exp $ */ +/* $OpenBSD: uipc_mbuf.c,v 1.11 1999/05/14 02:05:42 cmetz Exp $ */ /* $NetBSD: uipc_mbuf.c,v 1.15.4.1 1996/06/13 17:11:44 cgd Exp $ */ /* @@ -860,7 +860,8 @@ m_zero(m) sizeof(struct pkthdr), MHLEN); else bzero((void *)m + sizeof(struct m_hdr), MLEN); - if (m->m_flags & M_EXT) + if ((m->m_flags & M_EXT) && !m->m_ext.ext_func && + !mclrefcnt[mtocl((m)->m_ext.ext_buf)]) bzero(m->m_ext.ext_buf, m->m_ext.ext_size); m = m->m_next; } |