diff options
Diffstat (limited to 'hw/9pfs/9p-synth.c')
| -rw-r--r-- | hw/9pfs/9p-synth.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/hw/9pfs/9p-synth.c b/hw/9pfs/9p-synth.c index b38088e066..7a7cd5c5ba 100644 --- a/hw/9pfs/9p-synth.c +++ b/hw/9pfs/9p-synth.c @@ -182,7 +182,12 @@ static int synth_opendir(FsContext *ctx, V9fsSynthOpenState *synth_open; V9fsSynthNode *node = *(V9fsSynthNode **)fs_path->data; - synth_open = g_malloc(sizeof(*synth_open)); + /* + * V9fsSynthOpenState contains 'struct dirent' which have OS-specific + * properties, thus it's zero cleared on allocation here and below + * in synth_open. + */ + synth_open = g_new0(V9fsSynthOpenState, 1); synth_open->node = node; node->open_count++; fs->private = synth_open; @@ -220,7 +225,14 @@ static void synth_rewinddir(FsContext *ctx, V9fsFidOpenState *fs) static void synth_direntry(V9fsSynthNode *node, struct dirent *entry, off_t off) { - strcpy(entry->d_name, node->name); + size_t sz = strlen(node->name) + 1; + /* + * 'entry' is always inside of V9fsSynthOpenState which have NAME_MAX + * back padding. Ensure we do not overflow it. + */ + g_assert(sizeof(struct dirent) + NAME_MAX >= + offsetof(struct dirent, d_name) + sz); + memcpy(entry->d_name, node->name, sz); entry->d_ino = node->attr->inode; entry->d_off = off + 1; } @@ -266,7 +278,7 @@ static int synth_open(FsContext *ctx, V9fsPath *fs_path, V9fsSynthOpenState *synth_open; V9fsSynthNode *node = *(V9fsSynthNode **)fs_path->data; - synth_open = g_malloc(sizeof(*synth_open)); + synth_open = g_new0(V9fsSynthOpenState, 1); synth_open->node = node; node->open_count++; fs->private = synth_open; |