[Bug libc/20435] Missing unwind info in __startcontext causes infinite loop in _Unwind_Backtrace (CVE-2016-6323)

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

https://sourceware.org/bugzilla/show_bug.cgi?id=20435

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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a85abfa92220239cad0a8a6b0f2a223f5e6472a9

commit a85abfa92220239cad0a8a6b0f2a223f5e6472a9
Author: Andreas Schwab <schwab@suse.de>
Date:   Thu Aug 18 11:38:28 2016 +0200

    arm: mark __startcontext as .cantunwind (bug 20435)

    __startcontext marks the bottom of the call stack of the contexts created
    by makecontext.

    (cherry picked from commit 9e2ff6c9cc54c0b4402b8d49e4abe7000fde7617)

    Also includes the NEWS update, cherry-picked from commits
    056dd72af83f5459ce6d545a49dea6dba7d635dc and
    4d047efdbc55b0d68947cde682e5363d16a66294.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                |    6 ++++++
 NEWS                                     |    6 ++++++
 sysdeps/unix/sysv/linux/arm/setcontext.S |    7 +++++++
 3 files changed, 19 insertions(+), 0 deletions(-)

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