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Return early if image is zero height when generating fallback, otherwise we can

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allocated too little space. Reported by Vivek Parikh.
This commit is contained in:
Nicholas Marriott
2026-08-24 15:27:25 +01:00
parent f763f94556
commit 41e701ad84
1 changed files with 5 additions and 0 deletions
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5
image.c
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@@ -84,6 +84,11 @@ image_fallback(char **ret, u_int sx, u_int sy)
char *buf, *label; char *buf, *label;
u_int py, size, lsize; u_int py, size, lsize;
if (sy == 0) {
*ret = xstrdup("");
return;
}
/* Allocate first line. */ /* Allocate first line. */
lsize = xasprintf(&label, "SIXEL IMAGE (%ux%u)\r\n", sx, sy) + 1; lsize = xasprintf(&label, "SIXEL IMAGE (%ux%u)\r\n", sx, sy) + 1;
if (sx < lsize - 3) if (sx < lsize - 3)