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diff --git a/src/libkeymap/dump.c b/src/libkeymap/dump.c
index 83ac351..8531b5a 100644
--- a/src/libkeymap/dump.c
+++ b/src/libkeymap/dump.c
@@ -72,9 +72,14 @@ int lk_dump_bkeymap(struct lk_ctx *ctx, FILE *fd)
continue;
for (j = 0; j < NR_KEYS / 2; j++) {
- int v = lk_get_key(ctx, i, j);
+ int value = lk_get_key(ctx, i, j);
- if (fwrite(&v, sizeof(v), 1, fd) != 1)
+ if (value < 0 || value > USHRT_MAX) {
+ ERR(ctx, _("can not bind key %d to value %d because it is too large"), j, value);
+ goto fail;
+ }
+
+ if (fwrite(&value, sizeof(unsigned short), 1, fd) != 1)
goto fail;
}
}
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