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| author | John Baldwin <jhb@FreeBSD.org> | 2021-07-26 21:03:28 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2021-07-26 21:09:16 +0000 |
| commit | be79f30d6c3e353856d4f82227b270abc26be702 (patch) | |
| tree | 0afa41c7c18ae17cc4a106cd73b4444f1960e200 | |
| parent | d8787d4f7848bad8bd69325969806e1a76d0c3df (diff) | |
| download | src-be79f30d6c3e353856d4f82227b270abc26be702.tar.gz src-be79f30d6c3e353856d4f82227b270abc26be702.zip | |
m_dup: Handle unmapped mbufs as an input mbuf.
Use m_copydata() instead of a direct bcopy() when copying data out of
a source mbuf into a newly-allocated mbuf.
PR: 256610
Reported by: Niels Bakker <niels=freebsd@bakker.net>
Reviewed by: markj
MFC after: 2 weeks
| -rw-r--r-- | sys/kern/uipc_mbuf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c index 74c8ef62eb8d..0f1a0c5e4e0c 100644 --- a/sys/kern/uipc_mbuf.c +++ b/sys/kern/uipc_mbuf.c @@ -729,7 +729,7 @@ m_dup(const struct mbuf *m, int how) while (n->m_len < nsize && m != NULL) { int chunk = min(nsize - n->m_len, m->m_len - moff); - bcopy(m->m_data + moff, n->m_data + n->m_len, chunk); + m_copydata(m, moff, chunk, n->m_data + n->m_len); moff += chunk; n->m_len += chunk; remain -= chunk; |