Prevent crashes from occurring due to a strcmp of a NULL pointer.

(closes issue #12661)
Reported by: jaroth
Patches:
      urgentcompare.patch uploaded by jaroth (license 50)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@116590 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/apps/app_voicemail.c b/apps/app_voicemail.c
index 9dd7395..8a0ebab 100644 (file)
--- a/apps/app_voicemail.c
+++ b/apps/app_voicemail.c
@@ -3450,7 +3450,7 @@ static int copy_message(struct ast_channel *chan, struct ast_vm_user *vmu, int i
 
        ast_log(AST_LOG_NOTICE, "Copying message from %s@%s to %s@%s\n", vmu->mailbox, vmu->context, recip->mailbox, recip->context);
 
-       if (!strcmp(flag, "Urgent")) { /* If urgent, copy to Urgent folder */
+       if (!ast_strlen_zero(flag) && !strcmp(flag, "Urgent")) { /* If urgent, copy to Urgent folder */
                create_dirpath(todir, sizeof(todir), recip->context, recip->mailbox, "Urgent");
        } else {
                create_dirpath(todir, sizeof(todir), recip->context, recip->mailbox, "INBOX");
@@ -4121,7 +4121,7 @@ static int leave_voicemail(struct ast_channel *chan, char *ext, struct leave_vm_
                                                }
                                        }
 #ifndef IMAP_STORAGE
-                                       if (!strcmp(flag, "Urgent")) { /* If this is an Urgent message */
+                                       if (!ast_strlen_zero(flag) && !strcmp(flag, "Urgent")) { /* If this is an Urgent message */
                                                /* Move the message from INBOX to Urgent folder if this is urgent! */
                                                char sfn[PATH_MAX];
                                                char dfn[PATH_MAX];
@@ -10502,7 +10502,7 @@ static int play_record_review(struct ast_channel *chan, char *playfile, char *re
                case '4':
                        if (outsidecaller) {  /* only mark vm messages */
                                /* Mark Urgent */
-                               if (strcmp(flag, "Urgent")) {
+                               if (!ast_strlen_zero(flag) && strcmp(flag, "Urgent")) {
                                        ast_verbose(VERBOSE_PREFIX_3 "marking message as Urgent\n");
                                        ast_debug(1000, "This message is too urgent!\n");
                                        res = ast_play_and_wait(chan, "vm-marked-urgent");
@@ -10573,7 +10573,7 @@ static int play_record_review(struct ast_channel *chan, char *playfile, char *re
                        if (message_exists) {
                                cmd = ast_play_and_wait(chan, "vm-review");
                                if (!cmd && outsidecaller) {
-                                       if (strcmp(flag, "Urgent")) {
+                                       if (!ast_strlen_zero(flag) && strcmp(flag, "Urgent")) {
                                                cmd = ast_play_and_wait(chan, "vm-review-urgent");
                                        } else {
                                                cmd = ast_play_and_wait(chan, "vm-review-unurgent");