lib: validate input on close

Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

lib: validate input on close
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
769204e4 · Federico Vaga · 7628823a · 769204e4
Commit 769204e4 authored Sep 10, 2018 by Federico Vaga
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fmctdc-lib.c lib/fmctdc-lib.c +5 -0

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--- a/lib/fmctdc-lib.c
+++ b/lib/fmctdc-lib.c
@@ -285,6 +285,11 @@ int fmctdc_close(struct fmctdc_board *userb)
 	__define_board(b, userb);
 	int j;

+	if (!b) {
+		errno = EINVAL;
+		return -1;
+	}
+
 	for (j = 0; j < ARRAY_SIZE(b->fdc); j++) {
 		if (b->fdc[j] >= 0)
 			close(b->fdc[j]);