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ip: netns: fix missing netns close on some error paths 

In functions netns_pids() and netns_identify_pid(), the netns file is
not closed on some error paths.

Fix this using a conditional close and a single return point on both
functions.

Fixes: 44b563269e ("ip-nexthop: support flush by id")
Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Andrea Claudi 2021-04-19 15:37:25 +02:00 committed by Stephen Hemminger
parent b5a6ed9cc9
commit 38ef5bb7b4
1 changed files with 24 additions and 14 deletions
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38
ip/ipnetns.c
View File

@ -579,18 +579,18 @@ static int netns_pids(int argc, char **argv)
{
const char *name;
char net_path[PATH_MAX];
int netns;
int netns = -1, ret = -1;
struct stat netst;
DIR *dir;
struct dirent *entry;
if (argc < 1) {
fprintf(stderr, "No netns name specified\n");
return -1;
goto out;
}
if (argc > 1) {
fprintf(stderr, "extra arguments specified\n");
return -1;
goto out;
}
name = argv[0];
@ -599,18 +599,18 @@ static int netns_pids(int argc, char **argv)
if (netns < 0) {
fprintf(stderr, "Cannot open network namespace: %s\n",
strerror(errno));
return -1;
goto out;
}
if (fstat(netns, &netst) < 0) {
fprintf(stderr, "Stat of netns failed: %s\n",
strerror(errno));
return -1;
goto out;
}
dir = opendir("/proc/");
if (!dir) {
fprintf(stderr, "Open of /proc failed: %s\n",
strerror(errno));
return -1;
goto out;
}
while ((entry = readdir(dir))) {
char pid_net_path[PATH_MAX];
@ -627,15 +627,19 @@ static int netns_pids(int argc, char **argv)
printf("%s\n", entry->d_name);
}
}
ret = 0;
closedir(dir);
return 0;
out:
if (netns >= 0)
close(netns);
return ret;
}
int netns_identify_pid(const char *pidstr, char *name, int len)
{
char net_path[PATH_MAX];
int netns;
int netns = -1, ret = -1;
struct stat netst;
DIR *dir;
struct dirent *entry;
@ -647,22 +651,24 @@ int netns_identify_pid(const char *pidstr, char *name, int len)
if (netns < 0) {
fprintf(stderr, "Cannot open network namespace: %s\n",
strerror(errno));
return -1;
goto out;
}
if (fstat(netns, &netst) < 0) {
fprintf(stderr, "Stat of netns failed: %s\n",
strerror(errno));
return -1;
goto out;
}
dir = opendir(NETNS_RUN_DIR);
if (!dir) {
/* Succeed treat a missing directory as an empty directory */
if (errno == ENOENT)
return 0;
if (errno == ENOENT) {
ret = 0;
goto out;
}
fprintf(stderr, "Failed to open directory %s:%s\n",
NETNS_RUN_DIR, strerror(errno));
return -1;
goto out;
}
while ((entry = readdir(dir))) {
@ -685,8 +691,12 @@ int netns_identify_pid(const char *pidstr, char *name, int len)
strlcpy(name, entry->d_name, len);
}
}
ret = 0;
closedir(dir);
return 0;
out:
if (netns >= 0)
close(netns);
return ret;
}