Re: [PATCH] CHROMIUM: mwifiex: fix NULL pointer dereference error

[Wei-Ning Huang]

Sorry, please ignore this one. I forgot to strip the CHROMIUM: tag.

Wei-Ning

On Wed, Mar 30, 2016 at 6:08 PM, Wei-Ning Huang  wrote:
> In mwifiex_enable_hs, we need to check if
> priv->wdev.wiphy->wowlan_config is NULL before accessing it's member.
> This sometimes cause kernel panic when suspend/resume.
>
> Signed-off-by: Wei-Ning Huang 
> ---
>  drivers/net/wireless/marvell/mwifiex/sta_ioctl.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c 
> b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
> index d5c56eb..d8de432 100644
> --- a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
> +++ b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
> @@ -509,7 +509,8 @@ int mwifiex_enable_hs(struct mwifiex_adapter *adapter)
>
> if (priv && priv->sched_scanning) {
>  #ifdef CONFIG_PM
> -   if (!priv->wdev.wiphy->wowlan_config->nd_config) {
> +   if (priv->wdev.wiphy->wowlan_config &&
> +   !priv->wdev.wiphy->wowlan_config->nd_config) {
>  #endif
> mwifiex_dbg(adapter, CMD, "aborting bgscan!\n");
> mwifiex_stop_bg_scan(priv);
> --
> 2.1.2
>



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Wei-Ning Huang, 黃偉寧 | Software Engineer, Google Inc., Taiwan |
wnhu...@google.com | Cell: +886 910-380678
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[PATCH] CHROMIUM: mwifiex: fix NULL pointer dereference error

[Wei-Ning Huang]

In mwifiex_enable_hs, we need to check if
priv->wdev.wiphy->wowlan_config is NULL before accessing it's member.
This sometimes cause kernel panic when suspend/resume.

Signed-off-by: Wei-Ning Huang 
---
 drivers/net/wireless/marvell/mwifiex/sta_ioctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c 
b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
index d5c56eb..d8de432 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
@@ -509,7 +509,8 @@ int mwifiex_enable_hs(struct mwifiex_adapter *adapter)
 
if (priv && priv->sched_scanning) {
 #ifdef CONFIG_PM
-   if (!priv->wdev.wiphy->wowlan_config->nd_config) {
+   if (priv->wdev.wiphy->wowlan_config &&
+   !priv->wdev.wiphy->wowlan_config->nd_config) {
 #endif
mwifiex_dbg(adapter, CMD, "aborting bgscan!\n");
mwifiex_stop_bg_scan(priv);
-- 
2.1.2

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