[dpdk-dev] [PATCH] mem: memory leaks of hubedir caused by strdup

[Yangchao Zhou]

Fixes: cb97d93e9d3bb5607681085d20acaca1aa16deb1("mem: share hugepage info 
primary and secondary")

Signed-off-by: Yangchao Zhou <zhouya...@gmail.com>
---
 lib/librte_eal/linuxapp/eal/eal_hugepage_info.c |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c 
b/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c
index fb4b667..bf55334 100644
--- a/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c
+++ b/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c
@@ -169,8 +169,8 @@
        return size;
 }
 
-static const char *
-get_hugepage_dir(uint64_t hugepage_sz)
+static int
+get_hugepage_dir(uint64_t hugepage_sz, char *hugedir, int len)
 {
        enum proc_mount_fieldnames {
                DEVICE = 0,
@@ -188,7 +188,7 @@
        const char split_tok = ' ';
        char *splitstr[_FIELDNAME_MAX];
        char buf[BUFSIZ];
-       char *retval = NULL;
+       int retval = -1;
 
        FILE *fd = fopen(proc_mounts, "r");
        if (fd == NULL)
@@ -215,7 +215,8 @@
                        /* if no explicit page size, the default page size is 
compared */
                        if (pagesz_str == NULL){
                                if (hugepage_sz == default_size){
-                                       retval = strdup(splitstr[MOUNTPT]);
+                                       snprintf(hugedir, len, "%s", 
splitstr[MOUNTPT]);
+                                       retval = 0;
                                        break;
                                }
                        }
@@ -223,7 +224,8 @@
                        else {
                                uint64_t pagesz = 
rte_str_to_size(&pagesz_str[pagesize_opt_len]);
                                if (pagesz == hugepage_sz) {
-                                       retval = strdup(splitstr[MOUNTPT]);
+                                       snprintf(hugedir, len, "%s", 
splitstr[MOUNTPT]);
+                                       retval = 0;
                                        break;
                                }
                        }
@@ -351,7 +353,6 @@
 
        for (dirent = readdir(dir); dirent != NULL; dirent = readdir(dir)) {
                struct hugepage_info *hpi;
-               const char *hugedir;
 
                if (strncmp(dirent->d_name, dirent_start_text,
                            dirent_start_len) != 0)
@@ -363,10 +364,10 @@
                hpi = &internal_config.hugepage_info[num_sizes];
                hpi->hugepage_sz =
                        rte_str_to_size(&dirent->d_name[dirent_start_len]);
-               hugedir = get_hugepage_dir(hpi->hugepage_sz);
 
                /* first, check if we have a mountpoint */
-               if (hugedir == NULL) {
+               if (get_hugepage_dir(hpi->hugepage_sz,
+                       hpi->hugedir, sizeof(hpi->hugedir)) < 0) {
                        uint32_t num_pages;
 
                        num_pages = get_num_hugepages(dirent->d_name);
@@ -378,7 +379,6 @@
                                        num_pages, hpi->hugepage_sz);
                        continue;
                }
-               snprintf(hpi->hugedir, sizeof(hpi->hugedir), "%s", hugedir);
 
                /* try to obtain a writelock */
                hpi->lock_descriptor = open(hpi->hugedir, O_RDONLY);
-- 
1.7.1