diff options
| author | Xiaoke Wang <xkernel.wang@foxmail.com> | 2022-09-09 14:45:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-24 14:07:44 +0300 |
| commit | 06bfdb6d889f57fe9ce7bd139ce278b68f3a59de (patch) | |
| tree | fda6072a399b8fc2389e0c196bf153c4bcb19475 /drivers/staging/r8188eu | |
| parent | b77599043f00fce9253d0f22522c5d5b521555ce (diff) | |
| download | linux-06bfdb6d889f57fe9ce7bd139ce278b68f3a59de.tar.xz | |
staging: r8188eu: fix a potential memory leak in rtw_init_cmd_priv()
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>
Diffstat (limited to 'drivers/staging/r8188eu')
| -rw-r--r-- | drivers/staging/r8188eu/core/rtw_cmd.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/staging/r8188eu/core/rtw_cmd.c b/drivers/staging/r8188eu/core/rtw_cmd.c index ca1f2cc52470..04afeab0601f 100644 --- a/drivers/staging/r8188eu/core/rtw_cmd.c +++ b/drivers/staging/r8188eu/core/rtw_cmd.c @@ -57,8 +57,6 @@ exit: u32 rtw_init_cmd_priv(struct cmd_priv *pcmdpriv) { - u32 res = _SUCCESS; - init_completion(&pcmdpriv->enqueue_cmd); /* sema_init(&(pcmdpriv->cmd_done_sema), 0); */ init_completion(&pcmdpriv->start_cmd_thread); @@ -73,27 +71,24 @@ u32 rtw_init_cmd_priv(struct cmd_priv *pcmdpriv) pcmdpriv->cmd_allocated_buf = kzalloc(MAX_CMDSZ + CMDBUFF_ALIGN_SZ, GFP_KERNEL); - if (!pcmdpriv->cmd_allocated_buf) { - res = _FAIL; - goto exit; - } + if (!pcmdpriv->cmd_allocated_buf) + return _FAIL; pcmdpriv->cmd_buf = pcmdpriv->cmd_allocated_buf + CMDBUFF_ALIGN_SZ - ((size_t)(pcmdpriv->cmd_allocated_buf) & (CMDBUFF_ALIGN_SZ - 1)); pcmdpriv->rsp_allocated_buf = kzalloc(MAX_RSPSZ + 4, GFP_KERNEL); if (!pcmdpriv->rsp_allocated_buf) { - res = _FAIL; - goto exit; + kfree(pcmdpriv->cmd_allocated_buf); + return _FAIL; } pcmdpriv->rsp_buf = pcmdpriv->rsp_allocated_buf + 4 - ((size_t)(pcmdpriv->rsp_allocated_buf) & 3); pcmdpriv->cmd_done_cnt = 0; pcmdpriv->rsp_cnt = 0; -exit: - return res; + return _SUCCESS; } u32 rtw_init_evt_priv(struct evt_priv *pevtpriv) |