Messages in this thread | | | Date | Tue, 30 Nov 2021 18:18:24 +0100 | From | Johan Hovold <> | Subject | Re: [PATCH] fw_cfg: Fix memory leak in fw_cfg_register_file |
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On Tue, Nov 16, 2021 at 04:28:34PM +0100, Philippe Mathieu-Daudé wrote: > On 11/16/21 12:42, Miaoqian Lin wrote: > > When kobject_init_and_add() fails, entry should be freed just like > > when sysfs_create_bin_file() fails. > > > > Fixes: fe3c60684377 ("firmware: Fix a reference count leak.") > Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
No, no. This patch is completely bogus and would introduce a double free.
> > Signed-off-by: Miaoqian Lin <linmq006@gmail.com> > > --- > > drivers/firmware/qemu_fw_cfg.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c > > index 172c751a4f6c..0f404777f016 100644 > > --- a/drivers/firmware/qemu_fw_cfg.c > > +++ b/drivers/firmware/qemu_fw_cfg.c > > @@ -608,6 +608,7 @@ static int fw_cfg_register_file(const struct fw_cfg_file *f) > > fw_cfg_sel_ko, "%d", entry->select); > > if (err) { > > kobject_put(&entry->kobj); > > + kfree(entry);
entry would already have been freed by kobject_put() and fw_cfg_sysfs_release_entry() here.
> > return err; > > } > > > >
Doesn't look like this patch has been picked up yet, so:
NAK.
Johan
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