netdev - Re: [PATCH] iwlwifi: mvm: Change an 'else if' into an 'else' in iwl_mvm_send_add_bcast

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 7 Mar 2019 16:08:55 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] iwlwifi: mvm: Change an 'else if' into an 'else' in iwl_mvm_send_add_bcast_sta

On Thu, Mar 7, 2019 at 4:03 PM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> When building with -Wsometimes-uninitialized, Clang warns:
>
> drivers/net/wireless/intel/iwlwifi/mvm/sta.c:2114:12: warning: variable
> 'queue' is used uninitialized whenever 'if' condition is false
> [-Wsometimes-uninitialized]
>
> Clang can't evaluate at this point that WARN(1, ...) always returns true
> because __ret_warn_on is defined as !!(condition), which isn't
> immediately evaluated as 1. Change this branch to else so that it's
> clear to Clang that we intend to bail out here.
>
> Link: https://github.com/ClangBuiltLinux/linux/issues/399
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

Thanks for the simple fix.
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>  drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
> index 498c315291cf..360724ec41a6 100644
> --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
> +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
> @@ -2111,8 +2111,10 @@ int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
>                         queue = mvm->probe_queue;
>                 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
>                         queue = mvm->p2p_dev_queue;
> -               else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
> +               else {
> +                       WARN(1, "Missing required TXQ for adding bcast STA\n");
>                         return -EINVAL;
> +               }
>
>                 bsta->tfd_queue_msk |= BIT(queue);
>
> --
> 2.21.0
>


-- 
Thanks,
~Nick Desaulniers