[Linux-kernel-mentees] [PATCH v2] nl80211: Fix undefined behavior in bit shift
Shuah Khan
skhan at linuxfoundation.org
Thu Jun 27 03:34:24 UTC 2019
On 6/26/19 9:25 PM, Jiunn Chang wrote:
> Shifting signed 32-bit value by 31 bits is undefined. Changing most
> significant bit to unsigned.
>
> Changes included in v2:
> - use subsystem specific subject lines
> - CC required mailing lists
>
> Signed-off-by: Jiunn Chang <c0d1n61at3 at gmail.com>
> ---
Move version change lines here. They don't belong in the commit log.
> include/uapi/linux/nl80211.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
> index 6f09d1500960..fa7ebbc6ff27 100644
> --- a/include/uapi/linux/nl80211.h
> +++ b/include/uapi/linux/nl80211.h
> @@ -5314,7 +5314,7 @@ enum nl80211_feature_flags {
> NL80211_FEATURE_TDLS_CHANNEL_SWITCH = 1 << 28,
> NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR = 1 << 29,
> NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR = 1 << 30,
> - NL80211_FEATURE_ND_RANDOM_MAC_ADDR = 1 << 31,
> + NL80211_FEATURE_ND_RANDOM_MAC_ADDR = 1U << 31,
> };
>
> /**
>
thanks,
-- Shuah
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