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st/glsl_to_tgsi: fix potential crash when allocating temporaries 

When index - t->temps_size is greater than 4096, allocating space for
temporaries on demand will miserably crash. This can happen when a game
uses a lot of temporaries like the recent released Tomb raider.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Samuel Pitoiset 2016-04-28 21:09:12 +02:00
parent 750c38fad1
commit 8f2238ccba
1 changed files with 1 additions and 1 deletions
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2
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
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@ -5360,7 +5360,7 @@ dst_register(struct st_translate *t, gl_register_file file, unsigned index,
case PROGRAM_TEMPORARY:
/* Allocate space for temporaries on demand. */
if (index >= t->temps_size) {
const int inc = 4096;
const int inc = align(index - t->temps_size + 1, 4096);
t->temps = (struct ureg_dst*)
realloc(t->temps,