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Fix uint32 overflow in fill_empty_gamma_table on Icelake platform

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Closes: https://github.com/swaywm/sway/issues/4826
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Filip Sandborg 2020-03-15 18:41:12 +01:00 committed by GitHub
parent 1282c3b12f
commit 5ee52a3ab9
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1 changed files with 2 additions and 1 deletions
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backend/drm/drm.c
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@ -501,8 +501,9 @@ static bool drm_connector_commit(struct wlr_output *output) {
static void fill_empty_gamma_table(size_t size, static void fill_empty_gamma_table(size_t size,
uint16_t *r, uint16_t *g, uint16_t *b) { uint16_t *r, uint16_t *g, uint16_t *b) {
assert(0xFFFF < UINT64_MAX / (size - 1));
for (uint32_t i = 0; i < size; ++i) { for (uint32_t i = 0; i < size; ++i) {
uint16_t val = (uint32_t)0xffff * i / (size - 1); uint16_t val = (uint64_t)0xffff * i / (size - 1);
r[i] = g[i] = b[i] = val; r[i] = g[i] = b[i] = val;
} }
} }