From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0823819C540 for ; Thu, 28 Aug 2025 14:19:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756390746; cv=none; b=Lwy1NHPxQFC2Uf92XgY2BHaXNqS/qBGZKqxOOI0W5r9gLe0LFipGxM9N1fCfltWaLD7tfElsteyl6dls5UBddZ5uDcbm+3bz2gTfTT5fwjqhYFOfxeWB9Z3hpcMTdbPesr5iDrJ3/OCiw9yR+bZrwgRfokOxKicvtrbUZvsVsRw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756390746; c=relaxed/simple; bh=3cQdIAQuhU1GXAB3jlcby/wd6kRK4ewxh6fbJ9H1EKA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=BIrbXDmA64Ndhgxc2F5Ioy2wo0he+fYZ7dnrd19jieWJiTYJJSHQu1AjWhMnyDDzoZDH43xKuV4cuEwPKuwrqfwzRM3VWROWVWa6mTEnfPqtrgw29sIKmd0NQMq5WgJKaFXIoULnErfysjejQHTB3oS8c4gkjyoGX2BR5nj4kQs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f197.google.com with SMTP id e9e14a558f8ab-3ea6a44ffd8so11932885ab.1 for ; Thu, 28 Aug 2025 07:19:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756390744; x=1756995544; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=4vNxow1Z7vCc8nY6sViGrYogZaBqbU6MUUUZBffzoGs=; b=eifeHJnP8tGBAJD/br3vPVwR7bj7v1e3W/cku+3Zf6qrhAuGd4ged1i53ZnjHoNsYS TutMZ8HwzKygvSOiJoGTiAyo65NDWwPly+lrO6kxknibcjuAufrECAq4flFbU9MYfdmq BG5ZNb16tumnhej7LggpWy8/+ObhWQZafhn6wIdTtSDnDI4/yijotbSz9iksFULhkeRh l+YyPfZIO+p0pNxDBfMLX56jwovOTNiubW+W0oGtgqjwEKZ7SZ+64EDldWjAXbPKVwIu mjfrpwlTGbpIgCKuo9U8GMj0eq6hEaZ3Y2MZXVFL6G6DWX7CX/RGZUWYVst2A7eLtnjb bokg== X-Forwarded-Encrypted: i=1; AJvYcCVmVWeyW8tSEnWpBHSTFJZWyXCbGZx/1bS58loOuraf2cLtiVDu3UVZAomeJWy172557y2j1p54UrAVok8=@vger.kernel.org X-Gm-Message-State: AOJu0YxdhBescedt0M16dHl0ypY/T5jLOrOs6VBkJv8zj7scCd3jHG6n u7dTUZyjLkmqHDPSUfdSlgYG35WUEv9pXkPNBC4BuYXh65e9H0QoF7fCKThYlMk1ESuH4KvD3o8 9K6cTBxP0Dn3K1okeyPmBzPLvbYamWWRed1alZPbLkknbKOCgYQ+Sorg6yWw= X-Google-Smtp-Source: AGHT+IEAsfDAB+GRCAtz9L47WXgVDN8Fafo/oZRUP6vraSq8iAYKs0bPJewkCZDCo3k0DBEApDeQxYxSuBgLL2hUhJOuYKBNT8kl Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1fee:b0:3ed:b52f:214d with SMTP id e9e14a558f8ab-3edb52f244bmr154580235ab.23.1756390744049; Thu, 28 Aug 2025 07:19:04 -0700 (PDT) Date: Thu, 28 Aug 2025 07:19:04 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68b06558.050a0220.3db4df.0022.GAE@google.com> Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in release_sock (2) From: syzbot To: qianqiang.liu@163.com Cc: qianqiang.liu@163.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" > #syz test This crash does not have a reproducer. I cannot test it. > > --- a/net/bluetooth/af_bluetooth.c 2025-08-28 22:02:06 > +++ b/net/bluetooth/af_bluetooth.c 2025-08-28 22:13:46 > @@ -292,14 +292,12 @@ > */ > goto restart; > } > - > - /* sk is safely in the parent list so reduce reference count */ > - sock_put(sk); > > /* FIXME: Is this check still needed */ > if (sk->sk_state == BT_CLOSED) { > bt_accept_unlink(sk); > release_sock(sk); > + sock_put(sk); > continue; > } > > @@ -310,10 +308,12 @@ > sock_graft(sk, newsock); > > release_sock(sk); > + sock_put(sk); > return sk; > } > > release_sock(sk); > + sock_put(sk); > } > > return NULL; > > -- > Best, > Qianqiang Liu >