Check for missing commandline arg after options taking one. Bug 3049

diff --git a/src/src/exim.c b/src/src/exim.c
index 3cc2fa2fb972815bea62912f27f6df49ebe07e01..14c057f40d46ce1eb085fa4a48320514f8fe372c 100644 (file)
--- a/src/src/exim.c
+++ b/src/src/exim.c
@@ -847,7 +847,7 @@ exit(EXIT_FAILURE);
 
 /* fail if a length is too long */
 static inline void
-exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
+exim_len_fail_toolong(int itemlen, int maxlen, const char * description)
 {
 if (itemlen <= maxlen)
   return;
@@ -858,8 +858,10 @@ exit(EXIT_FAILURE);
 
 /* only pass through the string item back to the caller if it's short enough */
 static inline const uschar *
-exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
+exim_str_fail_toolong(const uschar * item, int maxlen, const char * description)
 {
+if (!item)
+  exim_fail("exim: bad item for: %s\n", description);
 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
 return item;
 }
@@ -884,10 +886,10 @@ log_write(0, LOG_MAIN|LOG_PANIC,
 struct stat buf;
 
 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
-{
+  {
   if (buf.st_uid == owner && buf.st_gid == group) return 0;
   log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
-}
+  }
 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
 
 #endif
@@ -896,6 +898,18 @@ return -1;
 }
 
 
+/* Bump the index for argv, checking for overflow,
+and return the argument. */
+
+static const uschar *
+next_argv(const uschar ** argv, int * pi, int argc, const uschar * where)
+{
+int i = *pi;
+if (++i >= argc) exim_fail("exim: bad item for: %s\n", where);
+return argv[*pi = i];
+}
+
+
 /*************************************************
 *         Extract port from host address         *
 *************************************************/
@@ -3151,7 +3165,8 @@ on the second character (the one after '-'), to save some effort. */
       {
       msg_action = MSG_SETQUEUE;
       queue_name_dest = string_copy_taint(
-       exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"),
+       exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
+                             EXIM_DRIVERNAME_MAX, "-MG"),
        GET_TAINTED);
       }
     else if (Ustrcmp(argrest, "mad") == 0) msg_action = MSG_MARK_ALL_DELIVERED;
@@ -3363,36 +3378,36 @@ on the second character (the one after '-'), to save some effort. */
 
        if (Ustrcmp(argrest, "a") == 0)
          sender_host_address = string_copy_taint(
-           exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"),
-           GET_TAINTED);
+           exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
+                                 EXIM_IPADDR_MAX, "-oMa"), GET_TAINTED);
 
        /* -oMaa: Set authenticator name */
 
        else if (Ustrcmp(argrest, "aa") == 0)
          sender_host_authenticated = string_copy_taint(
-           exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"),
-           GET_TAINTED);
+           exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
+                                 EXIM_DRIVERNAME_MAX, "-oMaa"), GET_TAINTED);
 
        /* -oMas: setting authenticated sender */
 
        else if (Ustrcmp(argrest, "as") == 0)
          authenticated_sender = string_copy_taint(
-           exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"),
-           GET_TAINTED);
+           exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
+                                 EXIM_EMAILADDR_MAX, "-oMas"), GET_TAINTED);
 
        /* -oMai: setting authenticated id */
 
        else if (Ustrcmp(argrest, "ai") == 0)
          authenticated_id = string_copy_taint(
-           exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMai"),
-           GET_TAINTED);
+           exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
+                                 EXIM_EMAILADDR_MAX, "-oMai"), GET_TAINTED);
 
        /* -oMi: Set incoming interface address */
 
        else if (Ustrcmp(argrest, "i") == 0)
          interface_address = string_copy_taint(
-           exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"),
-           GET_TAINTED);
+           exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
+                                 EXIM_IPADDR_MAX, "-oMi"), GET_TAINTED);
 
        /* -oMm: Message reference */
 
@@ -3402,7 +3417,7 @@ on the second character (the one after '-'), to save some effort. */
              exim_fail("-oMm must be a valid message ID\n");
          if (!f.trusted_config)
              exim_fail("-oMm must be called by a trusted user/config\n");
-           message_reference = argv[++i];
+           message_reference = next_argv(argv, &i, argc, arg);
          }
 
        /* -oMr: Received protocol */
@@ -3412,26 +3427,32 @@ on the second character (the one after '-'), to save some effort. */
          if (received_protocol)
            exim_fail("received_protocol is set already\n");
          else
-           received_protocol = string_copy_taint(
-             exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"),
-             GET_TAINTED);
+           if (++i >= argc) badarg = TRUE;
+           else
+             received_protocol = string_copy_taint(
+               exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-oMr"),
+               GET_TAINTED);
 
        /* -oMs: Set sender host name */
 
        else if (Ustrcmp(argrest, "s") == 0)
-         sender_host_name = string_copy_taint(
-           exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"),
-           GET_TAINTED);
+         if (++i >= argc) badarg = TRUE;
+         else
+           sender_host_name = string_copy_taint(
+             exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-oMs"),
+             GET_TAINTED);
 
        /* -oMt: Set sender ident */
 
        else if (Ustrcmp(argrest, "t") == 0)
-         {
-         sender_ident_set = TRUE;
-         sender_ident = string_copy_taint(
-           exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"),
-           GET_TAINTED);
-         }
+         if (++i >= argc) badarg = TRUE;
+         else
+           {
+           sender_ident_set = TRUE;
+           sender_ident = string_copy_taint(
+             exim_str_fail_toolong(argv[i], EXIM_IDENTUSER_MAX, "-oMt"),
+             GET_TAINTED);
+           }
 
        /* Else a bad argument */
 
@@ -3459,7 +3480,9 @@ on the second character (the one after '-'), to save some effort. */
          exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
                     "(uid=%d euid=%d | %d)\n",
                     root_uid, exim_uid, getuid(), geteuid(), real_uid);
-       if (!*argrest) override_pid_file_path = argv[++i];
+       if (!*argrest)
+         if (++i < argc) override_pid_file_path = argv[i];
+         else badarg = TRUE;
        else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
        else badarg = TRUE;
        break;
@@ -3487,10 +3510,9 @@ on the second character (the one after '-'), to save some effort. */
       /* Limits: Is there a real limit we want here?  1024 is very arbitrary. */
 
       case 'X':
-       if (*argrest) badarg = TRUE;
+       if (*argrest || ++i >= argc) badarg = TRUE;
        else override_local_interfaces = string_copy_taint(
-         exim_str_fail_toolong(argv[++i], 1024, "-oX"),
-         GET_TAINTED);
+         exim_str_fail_toolong(argv[i], 1024, "-oX"), GET_TAINTED);
        break;
 
       /* -oY: Override creation of daemon notifier socket */
@@ -3528,7 +3550,7 @@ on the second character (the one after '-'), to save some effort. */
     which sets the host protocol and host name */
 
     if (!*argrest)
-      if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
+      argrest = next_argv(argv, &i, argc, arg);
 
     if (*argrest)
       {
@@ -3614,8 +3636,14 @@ on the second character (the one after '-'), to save some effort. */
 
        else
          {
-         int intvl = readconf_readtime(*argrest ? argrest : argv[++i], 0, FALSE);
-         if (intvl <= 0)
+         int intvl;
+         const uschar * s;
+
+         if (*argrest) s = argrest;
+         else if (++i < argc) { badarg = TRUE; break; }
+         else s = argv[i];
+
+         if ((intvl = readconf_readtime(s, 0, FALSE)) <= 0)
            exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
 
          for (qrunner * qq = qrunners; qq; qq = qq->next)
@@ -3706,8 +3734,8 @@ on the second character (the one after '-'), to save some effort. */
     tested. Otherwise variability of clock ticks etc. cause problems. */
 
     case 'T':
-    if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
-      fudged_queue_times = string_copy_taint(argv[++i], GET_TAINTED);
+    if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0 && ++i < argc)
+      fudged_queue_times = string_copy_taint(argv[i], GET_TAINTED);
     else badarg = TRUE;
     break;