virtio: Fix memory leaks reported by Coverity

All four leaks are similar, so fix them in one patch.
Success path was not doing memory free.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

1 files changed, 8 insertions, 20 deletions

diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index 84efb31..d6b1c0c 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -486,7 +486,7 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
     int err = -1;
     int serrno = 0;
     V9fsString fullname;
-    char *buffer;
+    char *buffer = NULL;
 
     v9fs_string_init(&fullname);
     v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
@@ -497,7 +497,6 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
         buffer = rpath(fs_ctx, path);
         err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
         if (err == -1) {
-            g_free(buffer);
             goto out;
         }
         err = local_set_xattr(buffer, credp);
@@ -510,7 +509,6 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
         buffer = rpath(fs_ctx, path);
         err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
         if (err == -1) {
-            g_free(buffer);
             goto out;
         }
         err = local_set_mapped_file_attr(fs_ctx, path, credp);
@@ -523,7 +521,6 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
         buffer = rpath(fs_ctx, path);
         err = mknod(buffer, credp->fc_mode, credp->fc_rdev);
         if (err == -1) {
-            g_free(buffer);
             goto out;
         }
         err = local_post_create_passthrough(fs_ctx, path, credp);
@@ -537,8 +534,8 @@ static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
 err_end:
     remove(buffer);
     errno = serrno;
-    g_free(buffer);
 out:
+    g_free(buffer);
     v9fs_string_free(&fullname);
     return err;
 }
@@ -550,7 +547,7 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
     int err = -1;
     int serrno = 0;
     V9fsString fullname;
-    char *buffer;
+    char *buffer = NULL;
 
     v9fs_string_init(&fullname);
     v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
@@ -561,7 +558,6 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
         buffer = rpath(fs_ctx, path);
         err = mkdir(buffer, SM_LOCAL_DIR_MODE_BITS);
         if (err == -1) {
-            g_free(buffer);
             goto out;
         }
         credp->fc_mode = credp->fc_mode|S_IFDIR;
@@ -574,7 +570,6 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
         buffer = rpath(fs_ctx, path);
         err = mkdir(buffer, SM_LOCAL_DIR_MODE_BITS);
         if (err == -1) {
-            g_free(buffer);
             goto out;
         }
         credp->fc_mode = credp->fc_mode|S_IFDIR;
@@ -588,7 +583,6 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
         buffer = rpath(fs_ctx, path);
         err = mkdir(buffer, credp->fc_mode);
         if (err == -1) {
-            g_free(buffer);
             goto out;
         }
         err = local_post_create_passthrough(fs_ctx, path, credp);
@@ -602,8 +596,8 @@ static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
 err_end:
     remove(buffer);
     errno = serrno;
-    g_free(buffer);
 out:
+    g_free(buffer);
     v9fs_string_free(&fullname);
     return err;
 }
@@ -657,7 +651,7 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
     int err = -1;
     int serrno = 0;
     V9fsString fullname;
-    char *buffer;
+    char *buffer = NULL;
 
     /*
      * Mark all the open to not follow symlinks
@@ -673,7 +667,6 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
         buffer = rpath(fs_ctx, path);
         fd = open(buffer, flags, SM_LOCAL_MODE_BITS);
         if (fd == -1) {
-            g_free(buffer);
             err = fd;
             goto out;
         }
@@ -688,7 +681,6 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
         buffer = rpath(fs_ctx, path);
         fd = open(buffer, flags, SM_LOCAL_MODE_BITS);
         if (fd == -1) {
-            g_free(buffer);
             err = fd;
             goto out;
         }
@@ -704,7 +696,6 @@ static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
         buffer = rpath(fs_ctx, path);
         fd = open(buffer, flags, credp->fc_mode);
         if (fd == -1) {
-            g_free(buffer);
             err = fd;
             goto out;
         }
@@ -722,8 +713,8 @@ err_end:
     close(fd);
     remove(buffer);
     errno = serrno;
-    g_free(buffer);
 out:
+    g_free(buffer);
     v9fs_string_free(&fullname);
     return err;
 }
@@ -736,7 +727,7 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
     int serrno = 0;
     char *newpath;
     V9fsString fullname;
-    char *buffer;
+    char *buffer = NULL;
 
     v9fs_string_init(&fullname);
     v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
@@ -749,7 +740,6 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
         buffer = rpath(fs_ctx, newpath);
         fd = open(buffer, O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW, SM_LOCAL_MODE_BITS);
         if (fd == -1) {
-            g_free(buffer);
             err = fd;
             goto out;
         }
@@ -779,7 +769,6 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
         buffer = rpath(fs_ctx, newpath);
         fd = open(buffer, O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW, SM_LOCAL_MODE_BITS);
         if (fd == -1) {
-            g_free(buffer);
             err = fd;
             goto out;
         }
@@ -808,7 +797,6 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
         buffer = rpath(fs_ctx, newpath);
         err = symlink(oldpath, buffer);
         if (err) {
-            g_free(buffer);
             goto out;
         }
         err = lchown(buffer, credp->fc_uid, credp->fc_gid);
@@ -829,8 +817,8 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
 err_end:
     remove(buffer);
     errno = serrno;
-    g_free(buffer);
 out:
+    g_free(buffer);
     v9fs_string_free(&fullname);
     return err;
 }