Re: [PATCH] socket_local46: Make room on the stack for IPv6 sockaddrs

From: Laurent Bercot <>
Date: Sun, 26 Jul 2015 21:29:31 +0200

On 26/07/2015 21:15, Jesse Young wrote:
> byte_copy() reads past the end of the sockaddr structure because it
> isn't sufficiently large enough to handle sockaddr_in6 addresses
> resulting in undefined behavior. armv6-alpine-linux-muslgnueabihf-gcc
> 5.1.0-r0 generates the "UDF" instruction in this case, causing programs
> to SIGILL.

  Ah, good catch. sockaddr used to work, but it's stricto sensu incorrect -
and musl is very touchy with standards.
  I believe the right fix is to use sockaddr_storage, though. I'll commit
a fix tomorrow.
  Thanks !

Received on Sun Jul 26 2015 - 19:29:31 UTC

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