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Avoid race on reading alignment in for-loop

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Lysandros Nikolaou 2025-03-06 13:51:26 +01:00
parent 10104eb5aa
commit 308e1fc93d
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GPG Key ID: 43E92D11D08F5F29
2 changed files with 2 additions and 2 deletions
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2
src/libImaging/Imaging.h
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@ -201,7 +201,7 @@ extern struct ImagingMemoryArena ImagingArenas[IMAGING_ARENAS_COUNT + 1];
* statically-allocated. This is necessary to properly handle stats.
*/
#define IMAGING_ARENAS_FOREACH(arena) \
for ((arena) = &ImagingArenas[0]; (arena)->alignment >= 0; ++(arena))
for ((arena) = &ImagingArenas[0]; (arena)->index >= 0; ++(arena))
#else
/* In this case we either have the GIL or do not have thread-local storage, in
* which case we will only allocate a single arena.

2
src/libImaging/Storage.c
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@ -282,7 +282,7 @@ struct ImagingMemoryArena ImagingArenas[IMAGING_ARENAS_COUNT + 1] = {
{1, IMAGING_ARENA_BLOCK_SIZE, 0, 0, NULL, 0, 0, 0, 0, 0, 5, {0}},
{1, IMAGING_ARENA_BLOCK_SIZE, 0, 0, NULL, 0, 0, 0, 0, 0, 6, {0}},
{1, IMAGING_ARENA_BLOCK_SIZE, 0, 0, NULL, 0, 0, 0, 0, 0, 7, {0}},
{-1},
{1, IMAGING_ARENA_BLOCK_SIZE, 0, 0, NULL, 0, 0, 0, 0, 0, -1, {0}},
};
/* Get a pointer to the correct arena for this context. In this case where we