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vtysh: Fix, guard against NULL pointer dereference
getpwuid() may fail returning a null value leaving subsequent code vulnerable to a null pointer dereference. Signed-off-by: Jafar Al-Gharaibeh <jafar@atcorp.com> Signed-off-by: Jafar Al-Gharaibeh <jafar@atcorp.com> Tested-by: NetDEF CI System <cisystem@netdef.org>
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@ -195,7 +195,11 @@ vtysh_auth (void)
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struct vtysh_user *user;
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struct passwd *passwd;
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passwd = getpwuid (geteuid ());
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if ((passwd = getpwuid (geteuid ())) == NULL)
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{
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fprintf (stderr, "could not lookup user ID %d\n", (int) geteuid());
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exit (1);
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}
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user = user_lookup (passwd->pw_name);
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if (user && user->nopassword)
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