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author | John Baldwin <jhb@FreeBSD.org> | 2021-07-26 21:03:28 +0000 |
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committer | John Baldwin <jhb@FreeBSD.org> | 2021-08-11 19:18:46 +0000 |
commit | 3e4aeeb95df217fdd9ec21e5a86ec61d1b2abc59 (patch) | |
tree | 5cc8a953c8ea194df4c0a03e47fd55c05af05d78 | |
parent | 952226eedb0be32b2c952fb2ae12f76a62131c00 (diff) | |
download | src-3e4aeeb95df217fdd9ec21e5a86ec61d1b2abc59.tar.gz src-3e4aeeb95df217fdd9ec21e5a86ec61d1b2abc59.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
(cherry picked from commit be79f30d6c3e353856d4f82227b270abc26be702)
-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 f7852bc7dd7f..f525c25d1431 100644 --- a/sys/kern/uipc_mbuf.c +++ b/sys/kern/uipc_mbuf.c @@ -719,7 +719,7 @@ 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; |