Re: [PATCH AUTOSEL 5.19 47/63] staging: r8188eu: fix a potential memory leak in rtw_init_cmd_priv()

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Oct 12, 2022 at 08:18:21PM -0400, Sasha Levin wrote:
> From: Xiaoke Wang <xkernel.wang@foxmail.com>
> 
> [ Upstream commit 06bfdb6d889f57fe9ce7bd139ce278b68f3a59de ]
> 
> In rtw_init_cmd_priv(), if `pcmdpriv->rsp_allocated_buf` is allocated
> in failure, then `pcmdpriv->cmd_allocated_buf` will not be properly
> released. Besides, considering there are only two error paths and the
> first one can directly return, we do not need to implicitly jump to the
> `exit` tag to execute the error handling code.
> 
> So this patch added `kfree(pcmdpriv->cmd_allocated_buf);` on the error
> path to release the resource and simplified the return logic of
> rtw_init_cmd_priv(). As there is no proper device to test with, no
> runtime testing was performed.
> 
> Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
> Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
> Link: https://lore.kernel.org/r/tencent_1B6AAE10471D4556788892F8FF3E4812F306@qq.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>  drivers/staging/r8188eu/core/rtw_cmd.c | 15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)

This isn't needed in stable trees, please drop from all branches.

greg k-h