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From: u-uy74@aetey.se
To: musl@lists.openwall.com
Subject: Re: incompatibility between libtheora/mmx and musl ?
Date: Wed, 14 Sep 2016 17:11:46 +0200	[thread overview]
Message-ID: <20160914151145.GR16436@example.net> (raw)
In-Reply-To: <20160914144145.GT1280@port70.net>

On Wed, Sep 14, 2016 at 04:41:45PM +0200, Szabolcs Nagy wrote:
> this might be an issue:
> musl uses float instructions in malloc,
> if mmx needs different fpu state and
> they don't change it back for a malloc
> call that can corrupt the heap.
> 
> to test this, try to use the 'non-float bin index'
> code in musl from here:
> http://port70.net/~nsz/musl/malloc.c

Bingo!

The resulting encoder works like a charm.

I forward this info to Xiph and expect the fix will be on the way.

Thanks a lot Szabolcs (and everyone)!

Rune



  reply	other threads:[~2016-09-14 15:11 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-13 18:06 u-uy74
2016-09-13 19:20 ` Markus Wichmann
2016-09-13 20:41   ` Rich Felker
2016-09-13 20:43 ` Rich Felker
2016-09-14 10:32   ` u-uy74
2016-09-14 11:24     ` Szabolcs Nagy
2016-09-14 14:04       ` u-uy74
2016-09-14 14:28         ` Rich Felker
2016-09-14 14:31           ` Timo Teras
2016-09-14 14:39             ` Rich Felker
2016-09-14 14:40           ` Rich Felker
2016-09-14 14:41           ` Szabolcs Nagy
2016-09-14 15:11             ` u-uy74 [this message]
2016-10-02 10:59             ` "non-float" malloc (was: incompatibility between libtheora/mmx and musl) u-uy74
2016-10-02 11:17               ` u-uy74
2016-10-02 12:08               ` Szabolcs Nagy
2016-10-02 12:24                 ` u-uy74
2016-10-02 13:24                   ` u-uy74

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