tijl
823217168b
Do proper copyin of control message data in the Linux sendmsg syscall. ...
Instead of calling m_append with a user address, allocate an mbuf cluster
and copy data into it using copyin. For the SCM_CREDS case, instead of
zeroing a stack variable and appending that to the mbuf, zero part of the
mbuf cluster directly. One mbuf cluster is also the size limit used by
the FreeBSD sendmsg syscall (uipc_syscalls.c:sockargs()).
PR: 217901
Reviewed by: kib
MFC after: 3 days
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823217168b