From: Li Qiang Date: Mon, 17 Oct 2016 12:13:58 +0000 (+0200) Subject: 9pfs: fix information leak in xattr read X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=eb687602853b4ae656e9236ee4222609f3a6887d;p=qemu.git 9pfs: fix information leak in xattr read 9pfs uses g_malloc() to allocate the xattr memory space, if the guest reads this memory before writing to it, this will leak host heap memory to the guest. This patch avoid this. Signed-off-by: Li Qiang Reviewed-by: Greg Kurz Signed-off-by: Greg Kurz --- diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c index 26aa7d5648..bf23b011a8 100644 --- a/hw/9pfs/9p.c +++ b/hw/9pfs/9p.c @@ -3282,7 +3282,7 @@ static void coroutine_fn 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); - xattr_fidp->fs.xattr.value = g_malloc(size); + xattr_fidp->fs.xattr.value = g_malloc0(size); err = offset; put_fid(pdu, file_fidp); out_nofid: