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[24.130.122.79]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2ed0a10678csm2467904eec.24.2026.04.28.07.23.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Apr 2026 07:23:32 -0700 (PDT) Message-ID: <17d5b91c-026f-4539-a39a-cfd976860273@oss.qualcomm.com> Date: Tue, 28 Apr 2026 07:23:30 -0700 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] wifi: mac80211: drop stray 'static' from fast-RX rx_result To: Catherine , linux-wireless@vger.kernel.org, Felix Fietkau Cc: johannes@sipsolutions.net, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20260424131435.83212-2-enderaoelyther@gmail.com> From: Jeff Johnson Content-Language: en-US In-Reply-To: <20260424131435.83212-2-enderaoelyther@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDI4MDEzNiBTYWx0ZWRfXzK9Rpc5kfJWE aRF5+/LYQ4WGdNaq+iQvfMJSZwfbxX92aUzJKurRNlAnaYJ2uGP242/t0oVj1rX1n8f+L/eHM5D wluaTBT0TvexAODrEjuvtdZWwIrSMWQLoPCsfDz8/RXhgx6JJv2mvlU8aXr5Qf/3VE3vy8D+Udd kGCNjq3UvcFiQJa8YfbNMxZNmRtcmKVWBNcP15VFZAPLHrxZxl0xOsoq5C2pw8XgG4T2f/9Qxj0 1bkEL/qh8l2SVnULadh8t2jkSdFHiMEMk3MIPkO3bhJhNjeJQIwPinvAn/R9H2826/iB8XcpS7q MpAzHrNhC8gh99s+LZysFqgBbKeCccZ+bYyALRHd6y1ooIh66DQFTIyrzKdFK6h4AydwIFiEOnQ S2edVlBEN8IVZ63FatRKZg7ESHqy1MFaFu9zJI62M6q5SIB7st8SNQFvPnwzaF3oYWi7xVcGOIt ZqTpvGvgCm3w+6+HrPA== X-Authority-Analysis: v=2.4 cv=JoDBas4C c=1 sm=1 tr=0 ts=69f0c2e7 cx=c_pps a=Uww141gWH0fZj/3QKPojxA==:117 a=Tg7Z00WN3eLgNEO9NLUKUQ==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=VwQbUJbxAAAA:8 a=pGLkceISAAAA:8 a=EUspDBNiAAAA:8 a=vluirgkKQf0QiLCMEdgA:9 a=QEXdDO2ut3YA:10 a=PxkB5W3o20Ba91AHUih5:22 X-Proofpoint-GUID: vWxeicHBqDH8P2IcwkUWsksy0PF3-RpN X-Proofpoint-ORIG-GUID: vWxeicHBqDH8P2IcwkUWsksy0PF3-RpN X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-28_04,2026-04-28_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 clxscore=1015 adultscore=0 phishscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604280136 On 4/24/2026 6:14 AM, Catherine wrote: > ieee80211_invoke_fast_rx() is documented as safe for parallel RX, but > its per-invocation rx_result is declared static. Concurrent callers then > share one instance and can overwrite each other's result between > ieee80211_rx_mesh_data() and the switch on res. > > That can make a packet that was queued or consumed by > ieee80211_rx_mesh_data() fall through into ieee80211_rx_8023(), or make > a packet that should continue return as queued. > > Make res an automatic variable so each invocation keeps its own result. > > Fixes: 3468e1e0c639 ("wifi: mac80211: add mesh fast-rx support") @Felix: Any recollection why this was static in your original patch? > Cc: stable@vger.kernel.org > Signed-off-by: Catherine Is this an identity you commonly use? Note that anonymous contributions are not allowed: https://www.kernel.org/doc/html/latest/process/submitting-patches.html#developer-s-certificate-of-origin-1-1 > --- > net/mac80211/rx.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c > index 3e5d1c47a..8719db8f3 100644 > --- a/net/mac80211/rx.c > +++ b/net/mac80211/rx.c > @@ -4971,7 +4971,7 @@ static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx, > struct sk_buff *skb = rx->skb; > struct ieee80211_hdr *hdr = (void *)skb->data; > struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); > - static ieee80211_rx_result res; > + ieee80211_rx_result res; > int orig_len = skb->len; > int hdrlen = ieee80211_hdrlen(hdr->frame_control); > int snap_offs = hdrlen; Actual patch seem reasonable.. Reviewed-by: Jeff Johnson