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From: "nick.alcock at oracle dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/25680] ifuncmain9picstatic and ifuncmain9picstatic
 crash in IFUNC resolver due to stack canary
 (--enable-stack-protector=all)
Date: Sun, 05 Apr 2020 19:17:41 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25680

Nick Alcock <nick.alcock at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-04-05
                 CC|                            |nick.alcock at oracle dot =
com
             Status|UNCONFIRMED                 |ASSIGNED

--- Comment #5 from Nick Alcock <nick.alcock at oracle dot com> ---
I can confirm this. IFUNC resolvers should be marked with
inhibit_stack_protector: or, at least, when I added
--enable-stack-protector=3Dall, I marked all then present in glibc that way=
 (and
nobody said it was a bad idea). I don't see any other way to do it without
radical reorganization of ld.so, for more or less no gain. IFUNC resolvers =
have
lots of obscure requirements on them anyway: this is just another one.

I'll submit a patch fixing this in the next few days (probably next weekend,
over Easter) -- though the patch is so trivial that anyone else who's alrea=
dy
got a build-many-glibcs setup that doesn't need major surgery to revive it
(unlike me) is welcome to come up with it earlier :)

(taken.)

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