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staging: rtl8723bs: fix a potential memory leak in rtw_init_cmd_priv()

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In rtw_init_cmd_priv(), if `pcmdpriv->rsp_allocated_buf` is allocated
in failure, then `pcmdpriv->cmd_allocated_buf` will be not properly
released. Besides, considering there are only two error paths and the
first one can directly return, so we do not need implicitly jump to the
`exit` tag to execute the error handler.

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.

Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Link: https://lore.kernel.org/r/tencent_2B7931B79BA38E22205C5A09EFDF11E48805@qq.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xiaoke Wang 2022-09-09 19:27:21 +08:00 committed by Greg Kroah-Hartman
parent 5a5aa9cce6
commit 708056fba7
1 changed files with 6 additions and 10 deletions
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16
drivers/staging/rtl8723bs/core/rtw_cmd.c
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@ -161,8 +161,6 @@ static struct cmd_hdl wlancmds[] = {
int rtw_init_cmd_priv(struct cmd_priv *pcmdpriv)
{
int res = 0;
init_completion(&pcmdpriv->cmd_queue_comp);
init_completion(&pcmdpriv->terminate_cmdthread_comp);
@ -175,18 +173,16 @@ int rtw_init_cmd_priv(struct cmd_priv *pcmdpriv)
pcmdpriv->cmd_allocated_buf = rtw_zmalloc(MAX_CMDSZ + CMDBUFF_ALIGN_SZ);
if (!pcmdpriv->cmd_allocated_buf) {
res = -ENOMEM;
goto exit;
}
if (!pcmdpriv->cmd_allocated_buf)
return -ENOMEM;
pcmdpriv->cmd_buf = pcmdpriv->cmd_allocated_buf + CMDBUFF_ALIGN_SZ - ((SIZE_PTR)(pcmdpriv->cmd_allocated_buf) & (CMDBUFF_ALIGN_SZ-1));
pcmdpriv->rsp_allocated_buf = rtw_zmalloc(MAX_RSPSZ + 4);
if (!pcmdpriv->rsp_allocated_buf) {
res = -ENOMEM;
goto exit;
kfree(pcmdpriv->cmd_allocated_buf);
return -ENOMEM;
}
pcmdpriv->rsp_buf = pcmdpriv->rsp_allocated_buf + 4 - ((SIZE_PTR)(pcmdpriv->rsp_allocated_buf) & 3);
@ -196,8 +192,8 @@ int rtw_init_cmd_priv(struct cmd_priv *pcmdpriv)
pcmdpriv->rsp_cnt = 0;
mutex_init(&pcmdpriv->sctx_mutex);
exit:
return res;
return 0;
}
static void c2h_wk_callback(struct work_struct *work);