Date: Wed, 01 Aug 2018 23:21:54 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 230274] linuxulator and cloudabi don't handle multiple mbufs in a control message chain Message-ID: <bug-230274-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230274 Bug ID: 230274 Summary: linuxulator and cloudabi don't handle multiple mbufs in a control message chain Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: markj@FreeBSD.org cloudabi_sock_recv() and linux_recvmsg_common() use kern_recvit(), which may return control messages in addition to data. Suppose one uses sendmsg() to transmit multiple SCM_RIGHTS messages in a single call. When these messages are externalized, the unix socket code will place them in separate mbufs wh= ich get returned as a chain from kern_recvit(). From code inspection, some consumers only handle the first mbuf in the chain, so control messages will= be dropped in some cases. --=20 You are receiving this mail because: You are the assignee for the bug.=
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