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zink: prevent crash when freeing

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If the same vertex shader is used for more than one pipeline where for some a gs
is generated but not for others then the logic to free pipeline
libraries might use the incorrect stage_mask and try to free a non
existing gs.

Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21238>
This commit is contained in:
antonino 2023-02-22 17:24:57 +01:00 • committed by Marge Bot
parent 2748301a09
commit d786f52f1f
3 changed files with 6 additions and 0 deletions
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4
src/gallium/drivers/zink/zink_compiler.c
View file

@ -4726,6 +4726,10 @@ zink_shader_free(struct zink_screen *screen, struct zink_shader *shader)
while (util_dynarray_contains(&shader->pipeline_libs, struct zink_gfx_lib_cache*)) {
struct zink_gfx_lib_cache *libs = util_dynarray_pop(&shader->pipeline_libs, struct zink_gfx_lib_cache*);
//this condition is equivalent to verifying that, for each bit stages_present_i in stages_present,
//stages_present_i implies libs->stages_present_i
if ((stages_present & ~(libs->stages_present & stages_present)) != 0)
continue;
if (!libs->removed) {
libs->removed = true;
simple_mtx_lock(&screen->pipeline_libs_lock[idx]);

1
src/gallium/drivers/zink/zink_program.c
View file

@ -977,6 +977,7 @@ static struct zink_gfx_lib_cache *
create_lib_cache(struct zink_gfx_program *prog, bool generated_tcs)
{
struct zink_gfx_lib_cache *libs = rzalloc(NULL, struct zink_gfx_lib_cache);
libs->stages_present = prog->stages_present;
simple_mtx_init(&libs->lock, mtx_plain);
if (generated_tcs)
_mesa_set_init(&libs->libs, libs, hash_pipeline_lib_generated_tcs, equals_pipeline_lib_generated_tcs);

1
src/gallium/drivers/zink/zink_types.h
View file

@ -1005,6 +1005,7 @@ struct zink_gfx_lib_cache {
struct zink_shader *shaders[ZINK_GFX_SHADER_COUNT];
unsigned refcount;
bool removed; //once removed from cache
uint8_t stages_present;
simple_mtx_t lock;
struct set libs; //zink_gfx_library_key -> VkPipeline