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MFC r342879:

Description

MFC r342879:

Fix getsockopt() for IP_OPTIONS/IP_RETOPTS.

r336616 copies inp->inp_options using the m_dup() function.
However, this function expects an mbuf packet header at the beginning,
which is not true in this case.
Therefore, use m_copym() instead of m_dup().

This issue was found by syzkaller.

Reviewed by: mmacy@
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D18753

Details

Provenance
tuexenAuthored on
Differential Revision
D18753: Fix getsockopt(..., IPPROTO_IP, IP_OPTIONS, ..., ...)
Parents
rS343434: MFC r342857:
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