[Bug libc/28350] ping receives SIGABRT on lib32-qemux86-64 caused by recvmsg()

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28350

--- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Adhemerval Zanella
<azanella@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=21e0f45c7d73df6fe30c77ffcc9f81410e2ee369

commit 21e0f45c7d73df6fe30c77ffcc9f81410e2ee369
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Sep 27 16:07:08 2021 -0300

    linux: Fix ancillary 64-bit time timestamp conversion (BZ #28349, BZ
#28350)

    The __convert_scm_timestamps() only updates the control message last
    pointer for SOL_SOCKET type, so if the message control buffer contains
    multiple ancillary message types the converted timestamp one might
    overwrite a valid message.

    The test check if the extra ancillary space is correctly handled
    by recvmsg/recvmmsg, where if there is no extra space for the 64-bit
    time_t converted message the control buffer should be marked with
    MSG_TRUNC.  It also check if recvmsg/recvmmsg handle correctly multiple
    ancillary data.

    Checked on x86_64-linux and on i686-linux-gnu on both 5.11 and
    4.15 kernel.

    Co-authored-by: Fabian Vogt <fvogt@suse.de>

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