Ping? Anyone wants to take this? On 03/15/2014 09:40 PM, Sasha Levin wrote: > There wasn't any check of the size passed from userspace before > trying to allocate the memory required. > > This meant that userspace might request more space than allowed, > triggering an OOM. > > Signed-off-by: Sasha Levin <sasha.le...@oracle.com> > --- > fs/autofs4/dev-ioctl.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c > index 3182c0e..86fa7af 100644 > --- a/fs/autofs4/dev-ioctl.c > +++ b/fs/autofs4/dev-ioctl.c > @@ -103,6 +103,9 @@ static struct autofs_dev_ioctl *copy_dev_ioctl(struct > autofs_dev_ioctl __user *i > if (tmp.size < sizeof(tmp)) > return ERR_PTR(-EINVAL); > > + if (tmp.size > (PATH_MAX + sizeof(tmp))) > + return ERR_PTR(-E2BIG); > + > return memdup_user(in, tmp.size); > } > >
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