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Re: [Qemu-devel] [PATCH] 9pfs: fix memory leak in v9fs_xattrcreate
From: |
Greg Kurz |
Subject: |
Re: [Qemu-devel] [PATCH] 9pfs: fix memory leak in v9fs_xattrcreate |
Date: |
Mon, 10 Oct 2016 13:20:51 +0200 |
On Mon, 10 Oct 2016 03:41:38 -0700
Li Qiang <address@hidden> wrote:
> From: Li Qiang <address@hidden>
>
> The 'fs.xattr.value' field in V9fsFidState object doesn't consider the
> situation that this field has been allocated previously. Every time, it
> will be allocated directly. This leads a host memory leak issue. This
> patch fix this.
>
> Signed-off-by: Li Qiang <address@hidden>
> ---
I'll add to the changelog that this may happen if the client sends a
Txattrcreate message with the same fid number before the fid was
clunked.
Reviewed-by: Greg Kurz <address@hidden>
> hw/9pfs/9p.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
> index 8751c19..e4040dc 100644
> --- a/hw/9pfs/9p.c
> +++ b/hw/9pfs/9p.c
> @@ -3282,6 +3282,7 @@ static void v9fs_xattrcreate(void *opaque)
> xattr_fidp->fs.xattr.flags = flags;
> v9fs_string_init(&xattr_fidp->fs.xattr.name);
> v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name);
> + g_free(xattr_fidp->fs.xattr.value);
> xattr_fidp->fs.xattr.value = g_malloc0(size);
> err = offset;
> put_fid(pdu, file_fidp);