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elan: Prevent division by zero

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Marco Trevisan (Treviño)
2026-07-13 08:13:46 +00:00
committed by Marco Trevisan
parent db316a59f4
commit 2dee163512
1 changed files with 5 additions and 0 deletions
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libfprint/drivers/elan.c
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@@ -292,6 +292,11 @@ elan_process_frame_thirds (unsigned short *raw_frame,
lvl3 = sorted[frame_size - 1]; lvl3 = sorted[frame_size - 1];
g_free (sorted); g_free (sorted);
/* Ensure levels are strictly monotonic to prevent division by zero */
lvl1 = MAX (lvl1, lvl0 + 1);
lvl2 = MAX (lvl2, lvl1 + 1);
lvl3 = MAX (lvl3, lvl2 + 1);
unsigned short px; unsigned short px;
for (int i = 0; i < frame_size; i++) for (int i = 0; i < frame_size; i++)