From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-20.sinamail.sina.com.cn (r3-20.sinamail.sina.com.cn [202.108.3.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08060242D7B for ; Thu, 24 Jul 2025 23:34:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.20 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753400098; cv=none; b=kwL2X8yTYJRurrxT8YYwMJLe+iYyDvzmdFbLC9yyDB9U5C97j3d/DS+5xh6Rk4kLmrEjDsdSMpzlr6BqTCVjGf6ZJ9sqmKN2jet3WQwAbrh22bkuYFhxwQAQXHkzZRO8sTM3JansC9wHs+CHNJjhxFp4jb7X1bzDIMa9odavJT8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753400098; c=relaxed/simple; bh=r5iDeXVBofXl3jblBzbwHU7uSfLCxFrOszepvi0wXFg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uxw4RNQzu/lvEvC5KfzKXUDm5lEz/jqwDkwwQliyRsyNnqwylZiNTMqA/nc/vlPuSV1DN+6yIkTAYyJKN8D6ypxoTIDH88ieUkZXVALfcVailMJcE5KJFiJC0sbshbDpak1lnb2kD7oDl357mZdtWw6FbZ9v9Ho+w5f5C9al6MM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=psN8mrVG; arc=none smtp.client-ip=202.108.3.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="psN8mrVG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1753400094; bh=zvPgaFhEDpJ2NrBZOcIsVuijWKECpXTf7PKxoKscdcw=; h=From:Subject:Date:Message-ID; b=psN8mrVGvDwvMLCEnEcimURIntx6ZAVGL0rH8YSNhdB7dJvF1IcKTSrx05OBP6+vr kdFJeyk1Q/aulzlnj2reUZb2lBUZsHXx6fjCzfYosWHiASzWEc0lEQU3Q035IR0R6s WUbuRht10V5/V5+wGpF7hdLMrLee01iZXPjp1i5U= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.58.236]) by sina.com (10.54.253.32) with ESMTP id 6882C319000001B7; Thu, 25 Jul 2025 07:34:50 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 6737824456929 X-SMAIL-UIID: CF20D8093D9C4CA2A12DA519AE7D8452-20250725-073450-1 From: Hillf Danton To: Moon Hee Lee Cc: Al Viro , syzbot+d6ccd49ae046542a0641@syzkaller.appspotmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [fs?] [wireless?] general protection fault in simple_recursive_removal (5) Date: Fri, 25 Jul 2025 07:34:36 +0800 Message-ID: <20250724233438.3119-1-hdanton@sina.com> In-Reply-To: References: <20250724064051.431879-2-moonhee.lee.ca@gmail.com> <20250724155832.GU2580412@ZenIV> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Thu, 24 Jul 2025 10:29:47 -0700 Moon Hee Lee wrote: > On Thu, Jul 24, 2025 at 8:58 AM Al Viro wrote: > > It might paper over the specific reproducer, but that's not a fix... > > I'm not familiar with that code; will check the details, but in > > this form it is obviously still racy. > > Thanks for the feedback, Al. > > Agreed, this only papers over the issue. I'm tracing the > sta_info_destroy() path to confirm the race and will follow up with a > proper fix if confirmed. > A look at net/mac80211/debugfs_netdev.c:1021 [1] helps to prepare a proper fix. [1] https://lore.kernel.org/lkml/6881aed3.a00a0220.2f88df.000b.GAE@google.com/