From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1DF122DC783; Mon, 17 Aug 2026 14:44:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786977898; cv=none; b=nmEvep/zjpUYfQgNRKRLYi5eIFLGhGM3wZSXN3x6C9Vfj31Tn32TMsE4FyFmIo1xas9tqYvoiRdySbv4v3LNVxyqYkwkxpB9Rhr4poWhA1WO3fCj7W0JPUAHEoU+KSVK5jRe5XRf7yoyxiT4gi4yecTFeL7doOYDeUxEYD9Q7t4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786977898; c=relaxed/simple; bh=4ZKA/ez7QqVslW7Nljedd0QHzPXJdvN+/f0f+8yGujs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WwaZLWNkRI3rZ1ckzjrDqKUtV5z65b74qH4+2gzijXLzITN/ZIoiHLn7jhyOtpgI9sTi5gK0mclzSDdxgkF9tOGFCtY9Vta9487cXUohraHIv4DE5xpAc4eZ3q1nGUr5YQqLkrksK8hX87Ot1NzCOIFmcOuaFMfhgA2OO084o8M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=14aHsvrg; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="14aHsvrg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 233821F000E9; Mon, 17 Aug 2026 14:44:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786977896; bh=FcYPCDelOdnDHsj/z1OBOCvX7WvARZApQnTnOseqH0Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=14aHsvrgGdeom2yCnUmhh5of63Y5Z5Vg6NkKZfGweXZnFenFgFR3WTizJL4ISscq0 gIBcbU5ydokyYLr3v8QeosnMql5hCuEtNeY9eU1gmzmJEhR/y2SvBNkZr0kclQ1q67 sIls/KGy7hrZjqhpGoGYCwhU45rV7w4QBgCsoOnM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jordan Rife , Martin KaFai Lau , Kuniyuki Iwashima , Stanislav Fomichev , Sasha Levin Subject: [PATCH 6.12 030/181] bpf: tcp: Make mem flags configurable through bpf_iter_tcp_realloc_batch Date: Mon, 17 Aug 2026 15:32:04 +0200 Message-ID: <20260817132536.560895793@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260817132535.394764707@linuxfoundation.org> References: <20260817132535.394764707@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jordan Rife [ Upstream commit 8271bec9fc1cfe522b1a18cacbefd6712a3d41c2 ] Prepare for the next patch which needs to be able to choose either GFP_USER or GFP_NOWAIT for calls to bpf_iter_tcp_realloc_batch. Signed-off-by: Jordan Rife Signed-off-by: Martin KaFai Lau Reviewed-by: Kuniyuki Iwashima Acked-by: Stanislav Fomichev Stable-dep-of: e5fd3f514e27 ("bpf: tcp: Fix use-after-free in bpf_iter_tcp_established_batch()") Signed-off-by: Sasha Levin --- net/ipv4/tcp_ipv4.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index a9f3ee89302ce..cffa0fc1ae6e1 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -3032,12 +3032,12 @@ static void bpf_iter_tcp_put_batch(struct bpf_tcp_iter_state *iter) } static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter, - unsigned int new_batch_sz) + unsigned int new_batch_sz, gfp_t flags) { struct sock **new_batch; new_batch = kvmalloc(sizeof(*new_batch) * new_batch_sz, - GFP_USER | __GFP_NOWARN); + flags | __GFP_NOWARN); if (!new_batch) return -ENOMEM; @@ -3149,7 +3149,8 @@ static struct sock *bpf_iter_tcp_batch(struct seq_file *seq) return sk; } - if (!resized && !bpf_iter_tcp_realloc_batch(iter, expected * 3 / 2)) { + if (!resized && !bpf_iter_tcp_realloc_batch(iter, expected * 3 / 2, + GFP_USER)) { resized = true; goto again; } @@ -3578,7 +3579,7 @@ static int bpf_iter_init_tcp(void *priv_data, struct bpf_iter_aux_info *aux) if (err) return err; - err = bpf_iter_tcp_realloc_batch(iter, INIT_BATCH_SZ); + err = bpf_iter_tcp_realloc_batch(iter, INIT_BATCH_SZ, GFP_USER); if (err) { bpf_iter_fini_seq_net(priv_data); return err; -- 2.53.0