Date: Wed, 25 Jan 2017 12:00:48 -0500 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: Need to zero pads in msghdr On Wed, Jan 25, 2017 at 08:42:52AM -0800, Andrei Vagin wrote: > Hi, > > In this patch > http://git.musl-libc.org/cgit/musl/commit/arch/x86_64/bits/socket.h?id=7168790763cdeb794df52be6e3b39fbb021c5a64 > you suppose that the kernel ignores the upper 32 bits of msg_iovlen, > but it doesn't, so pads in msghdr structures have to be zeroed before > calling sendmsg and recvmsg syscalls. > > https://github.com/xemul/criu/issues/276 sendmsg and recvmsg perform this zeroing. If it's not working there must be some more subtle cause. Rich
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