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/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230274 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 which 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. -- You are receiving this mail because: You are the assignee for the bug.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-230274-227>