[Bug 222039] Incorrect 32-bit emulation of SCM_BINTIME and SCM_TIMESTAMP
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Thu Sep 7 04:31:01 UTC 2017
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222039
--- Comment #1 from commit-hook at freebsd.org ---
A commit references this bug:
Author: sobomax
Date: Thu Sep 7 04:29:57 UTC 2017
New revision: 323254
URL: https://svnweb.freebsd.org/changeset/base/323254
Log:
In the recvmsg32() system call iterate over returned structure(s)
and convert any messages of types SCM_BINTIME, SCM_TIMESTAMP,
SCM_REALTIME and SCM_MONOTONIC from 64-bit to its 32-bit
representation. Otherwise we either run out of user-supplied
buffer to copy those out resulting in the MSG_CTRUNC or simply
return values that the userland 32-bit code is not going
to parse correctly. This fixes at least two regression tests
failing to function properly in 32-bit compat mode:
tools/regression/sockets/udp_pingpong
tools/regression/sockets/unix_cmsg
PR: kern/222039
MFC after: 30 days
Changes:
head/sys/compat/freebsd32/freebsd32.h
head/sys/compat/freebsd32/freebsd32_misc.c
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