From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 51C7813DDC2 for ; Wed, 24 Jul 2024 09:39:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721813950; cv=none; b=Fz3eQPAyYDV+yxtiXXqS7Ut8XF43LJnIwe9CKr6Tl2WQk8zw4fJUcbp94KRWzdjNw20PwE0pDMjiadcIEjQFGXlHa+nq6yX2RdHItOMo4c3Fmakb6t3tpd82zzA8wu3tZHICAYftIbuqrabHqToMBKp6X9OcbAoLHuK4y3eizNQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721813950; c=relaxed/simple; bh=Bp81iqZIOYmPiZ/Bh1NDCZ12s/a/ruOql1tu+JpFESg=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=N4do0M55h0NG0TR7tmA0j7cxE1w8l9hK7qvaQZ07b0CeIyoS8E3JOEHENT3jCUqa0UoJociRbHVHdrvDWuLFZ0RlNILqWQPtWmmPkc8IFq03ROwr4K6Dbzf1F2mxbWfmeoyi3hm4PJKRvh5Lpe2wJKGMRo5qCQq9KE5SgPUBDos= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-39835205d20so91190455ab.0 for ; Wed, 24 Jul 2024 02:39:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721813948; x=1722418748; h=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=GyUkjtNhd14qYqsMaoK4xiiu1t1Nq0fBgKjw3ohaDzI=; b=tNRRwApdNhFCZBwPFd/niJuRlGjkZAx7edjhkNleVqG1t6YfPanU2QEWT5soS2JGrJ uR2cCH9gKk+88niwFTOWC1Xa6PMmi5XZzJFX2pLsVSinfC+I5TzYL65gwiR60kY/4BHz qxN9GmP4VluEuvpkONa4xJvAXJFxQ5h1cgUqKJVtsAOMEnj0+HBWLA36n/aszAnhduIN zdodyF88qJiUFpy/Ev59VbpFEGYzuu0HGWcU9Hueg/Lev5kZv2rvD2HIK8PWezELGBXE 9gc4t7iDSdV7j5Ucn1j/TgpgVO9T0pLlkf8Sc14ets1oktTPW7S7J7qhA6uWnLTxtr4j MpQw== X-Gm-Message-State: AOJu0Yx9DU7Me4B1TZuZpTZCE0USTthXBe/7WJRSA+nODa0J6GF4GGqy j9TIPnaUP/q3kUzuWKkm8ynwMxjL6DfnLjnaI+EZsIITLBqviLFoQ6XfY3DY3bq7EijVzrcCIFS /AM+vcrsRAvcwPsPxf8k+aQ88EApWiDidpWNhj0auoBU0T1s/YRjk6k8= X-Google-Smtp-Source: AGHT+IEKz1CWOsSrTakcdR6Mff8ypIrFc0rBf3/hyTEU9yhIIjwJyw1UJw2m2Vrs1mkOFTEGNtDARE0wCJ8TQA45arvrdZmOJwWn Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d1c:b0:376:1fae:4604 with SMTP id e9e14a558f8ab-39a19768a28mr1705055ab.4.1721813948529; Wed, 24 Jul 2024 02:39:08 -0700 (PDT) Date: Wed, 24 Jul 2024 02:39:08 -0700 In-Reply-To: <0000000000009d1d0a061d91b803@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c59739061dfb0c1f@google.com> Subject: Re: [syzbot] Re: [syzbot] [net?] [bpf?] general protection fault in __dev_flush From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Re: [syzbot] [net?] [bpf?] general protection fault in __dev_flush Author: aha310510@gmail.com #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master --- drivers/net/tun.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 9b24861464bc..022ffadae2af 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1661,7 +1661,6 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, int len, int *skb_xdp) { struct page_frag *alloc_frag = ¤t->task_frag; - struct bpf_net_context __bpf_net_ctx, *bpf_net_ctx; struct bpf_prog *xdp_prog; int buflen = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); char *buf; @@ -1701,7 +1700,6 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, local_bh_disable(); rcu_read_lock(); - bpf_net_ctx = bpf_net_ctx_set(&__bpf_net_ctx); xdp_prog = rcu_dereference(tun->xdp_prog); if (xdp_prog) { struct xdp_buff xdp; @@ -1730,14 +1728,12 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, pad = xdp.data - xdp.data_hard_start; len = xdp.data_end - xdp.data; } - bpf_net_ctx_clear(bpf_net_ctx); rcu_read_unlock(); local_bh_enable(); return __tun_build_skb(tfile, alloc_frag, buf, buflen, len, pad); out: - bpf_net_ctx_clear(bpf_net_ctx); rcu_read_unlock(); local_bh_enable(); return NULL; --