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32 lines
880 B
32 lines
880 B
6 years ago
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diff --git a/bin/nsupdate/nsupdate.c b/bin/nsupdate/nsupdate.c
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index 486c102..dc12a85 100644
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--- a/bin/nsupdate/nsupdate.c
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+++ b/bin/nsupdate/nsupdate.c
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@@ -1566,16 +1566,20 @@ evaluate_realm(char *cmdline) {
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#ifdef GSSAPI
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char *word;
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char buf[1024];
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+ int n;
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- word = nsu_strsep(&cmdline, " \t\r\n");
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- if (word == NULL || *word == 0) {
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- if (realm != NULL)
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- isc_mem_free(mctx, realm);
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+ if (realm != NULL) {
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+ isc_mem_free(mctx, realm);
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realm = NULL;
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- return (STATUS_MORE);
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}
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- snprintf(buf, sizeof(buf), "@%s", word);
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+ word = nsu_strsep(&cmdline, " \t\r\n");
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+ if (word == NULL || *word == 0)
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+ return (STATUS_MORE);
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+
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+ n = snprintf(buf, sizeof(buf), "@%s", word);
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+ if (n < 0 || (size_t)n >= sizeof(buf))
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+ fatal("realm is too long");
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realm = isc_mem_strdup(mctx, buf);
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if (realm == NULL)
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fatal("out of memory");
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