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odhcpd: fix passing possible negative parameter
[project/odhcpd.git]
/
src
/
odhcpd.c
diff --git
a/src/odhcpd.c
b/src/odhcpd.c
index 0e0002d95159e402e4c004b76021312ec58c667c..7c6c144112e076efc37ac2c38bb55fb3c33ef3d5 100644
(file)
--- a/
src/odhcpd.c
+++ b/
src/odhcpd.c
@@
-128,6
+128,9
@@
int odhcpd_get_interface_config(const char *ifname, const char *what)
snprintf(buf, sizeof(buf), sysctl_pattern, ifname, what);
int fd = open(buf, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
ssize_t len = read(fd, buf, sizeof(buf) - 1);
close(fd);