This fix has been submitted upstream as part of a combined patch

which has fixes for CR15758982(027.7118090.hr_filesys.patch) and this CR(16439911).

This can be found in the following location.

https://sourceforge.net/p/net-snmp/patches/1287/. 

This patch has not been accepted yet. 

--- net-snmp-5.4.1.old/agent/mibgroup/host/hr_filesys.c	2014-07-15 01:53:05.131000348 -0700

+++ net-snmp-5.4.1/agent/mibgroup/host/hr_filesys.c	2014-07-15 01:48:04.221278640 -0700

@@ -698,20 +698,25 @@

 static int 

 load_mnttab_cache_solaris()

 {

-    char buf[512] = {NULL};

+    char buf[MNT_LINE_MAX] = {NULL};

     int i = 0;

     struct stat file_stat;

     const char **cpp;

-    char *ch;

+    char *ch, *token_ptr;

     int token_flag = 0;

     int skip_flag = 0;

     int ignore_flag = 0;

     int j = 0;

     int lines = 0;

     int ret = 0;

+    int chk_mnt = -1;

     HRFS_index = 0;

-    stat(ETC_MNTTAB, &file_stat);

+    if(stat(ETC_MNTTAB, &file_stat) != 0)

+    {

+        DEBUGMSGTL(("host/hr_filesys", "stat failed for mnttab.\n"));

+        return -1;

+    }

     if (last_access == -1 || last_access != file_stat.st_mtime) {

         fp = fopen(ETC_MNTTAB, "r");

         if(fp == NULL)

@@ -731,7 +736,7 @@

              * which determines the valid entries.

              */

-            ch = strtok(buf, " \t");

+            ch = strtok_r(buf, " \t", &token_ptr);

             while (ch != NULL) {

                 j++;

                 if(j == 3) {

@@ -745,7 +750,7 @@

                 }

                 if(token_flag)

                     break;

-                ch = strtok(NULL, " \t");

+                ch = strtok_r(NULL, " \t", &token_ptr);

              }

              if(!skip_flag)

                  lines++;

@@ -765,25 +770,43 @@

             free(HRFS_list);

             return -1;

         }

-

-        while (i < fscount) {

-            if (getmntent(fp, &HRFS_entry_struct) == 0) {

-                 for (cpp = HRFS_ignores; *cpp != NULL; ++cpp) {

-                     if (!strcmp(HRFS_entry_struct.HRFS_type, *cpp)) {

-                         ignore_flag = 1;

-                         break;

-                     }

+        while ((chk_mnt = getmntent(fp, &HRFS_entry_struct)) != -1) {

+             if(chk_mnt != 0)

+                 continue;

+             for (cpp = HRFS_ignores; *cpp != NULL; ++cpp) {

+                 if (!strcmp(HRFS_entry_struct.mnt_fstype, *cpp)) {

+                     ignore_flag = 1;

+                     break;

                  }

-

-                 if(!ignore_flag) {

-                     HRFS_list[i].mnt_special = strdup(HRFS_entry_struct.mnt_special);

-                     HRFS_list[i].mnt_mountp = strdup(HRFS_entry_struct.mnt_mountp);

-                     HRFS_list[i].mnt_fstype = strdup(HRFS_entry_struct.mnt_fstype);

-                     HRFS_list[i].mnt_mntopts = strdup(HRFS_entry_struct.mnt_mntopts);

-                     i++;

+             }

+             if(!ignore_flag) {

+                 if(i >= fscount)

+                 {

+                    DEBUGMSGTL(("host/hr_filesys","increasing cachesize from %d to %d",fscount,i+1));

+                    HRFS_list = realloc(HRFS_list, sizeof(struct mnttab) * (i+1));

+                    fscount = i+1;

+                    if(HRFS_list == NULL)

+                    {

+                        DEBUGMSGTL(("host/hr_filesys","\nrealloc failed for mnttab cache.\n"));

+                        return -1;

+                    }

                  }

-

-                 ignore_flag = 0;

+                 HRFS_list[i].mnt_special = strdup(HRFS_entry_struct.mnt_special);

+                 HRFS_list[i].mnt_mountp = strdup(HRFS_entry_struct.mnt_mountp);

+                 HRFS_list[i].mnt_fstype = strdup(HRFS_entry_struct.mnt_fstype);

+                 HRFS_list[i].mnt_mntopts = strdup(HRFS_entry_struct.mnt_mntopts);

+                 i++;

+             }

+             ignore_flag = 0;

+        }

+        if(i < fscount)

+        {

+            DEBUGMSGTL(("host/hr_filesys","\ndecreasing cachesize from %d to %d\n",fscount,i));

+            HRFS_list = realloc(HRFS_list, sizeof(struct mnttab) * i );

+            if(HRFS_list == NULL)

+            {

+                DEBUGMSGTL(("host/hr_filesys","\nrealloc failed for mnttab cache.\n"));

+                return -1;

             }

         }

@@ -925,19 +948,19 @@

         HRFS_entry = NULL;

     }

 #else

-    int i = 0;

     if (fp != NULL)

         fclose(fp);

     fp = NULL;

 #ifdef solaris2

-while (i < fscount) {

-    free(HRFS_list[i].mnt_special);

-    free(HRFS_list[i].mnt_mountp);

-    free(HRFS_list[i].mnt_fstype);

-    free(HRFS_list[i].mnt_mntopts);

-    i++;

-}

+    int i = 0;

+    while (i < fscount) {

+        free(HRFS_list[i].mnt_special);

+        free(HRFS_list[i].mnt_mountp);

+        free(HRFS_list[i].mnt_fstype);

+        free(HRFS_list[i].mnt_mntopts);

+        i++;

+    }

     if (HRFS_list != NULL)

         free(HRFS_list);

     last_access = -1;