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 9F22A382F03 for ; Tue, 15 Sep 2026 13:31:10 +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=1789479071; cv=none; b=eL9hyE+oshNpwrNvJ4mQ7X7bFm6vNsxKP2Esr1oWm53MPItwqS0kXrXCMKF0aCDzl/9rRdsqNhC4evUX3oMs3JTOeuc0PB4skVl9nSoyUuwnu9bfx4mtj7MldsGses0QSc7PY9Lod6IaQ+NMotwmgOwilNa9hMAsjVXV9OTGjpc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789479071; c=relaxed/simple; bh=dy8fb8ZU3DcIE/n/fb0cf+zDds3+7clElToBQ3QuTA0=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=eqVK7UmTzFHE0C/7ndDZ1oz46DkFMfgQEpqr7JX/eULKMqhcTJAUphILj5xKbs0Yn6Ile0BUFCUJnFH7bek3T82ZQ6WBVLqrR51s2PtLkNcsXEIbIGeU52yzlk3+zR5TSt9s50p3E7Yd/8+eJvO9BMnPncLAoFKq+PxTrACTMMc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HJT4P7Mc; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HJT4P7Mc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3845A1F000FF; Tue, 15 Sep 2026 13:31:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789479070; bh=SweczCFMiiYIVa37dZAn2fzNt4I/2iiJkQPvSBKl7X0=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=HJT4P7Mcv33RIwtJUcMR6SAVj5u+sIArrqqPHjknqJwhhzf0ok1u9j5KzV7hzZZ8E mOOCanOFZLGJn/FM+a4QBy79xjsdY6wR23vxGboAzvF5t0789nxHlf/YUH+rhdIIwv Cscwky+AVbXxfyMKrLqy94Mufr28neF/Bdo6I3KR6bU0ot8M9XG2p8ouZjzwXdkYcj 9anK5/+f52Itw24jvCDCTWTJeE92/CUPDaFB78IFfjdTdz7BQa1/KerhOSTIsmRyRM CfjBR/0qHo8I1rJYx0aVxYR7STh56wCLglFFFdgmSeBnRwS4Ao8uIslWcAMf/ADAXO ritCuAmIqTksA== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 1997839263A7; Tue, 15 Sep 2026 13:30:06 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net] tcp: do not let tcp_rmem be set below 4096 From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178947900487.1624210.17299978647712863971.git-patchwork-notify@kernel.org> Date: Tue, 15 Sep 2026 13:30:04 +0000 References: <20260912144848.3448026-1-edumazet@google.com> In-Reply-To: <20260912144848.3448026-1-edumazet@google.com> To: Eric Dumazet Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, ncardwell@google.com, kuniyu@google.com, netdev@vger.kernel.org, eric.dumazet@gmail.com Hello: This patch was applied to netdev/net.git (main) by Paolo Abeni : On Sat, 12 Sep 2026 14:48:48 +0000 you wrote: > We can hit a division by zero crash in tcp_rcvbuf_grow() > and tcp_rcv_space_adjust(): > > divide error: 0000 [#1] PREEMPT SMP > RIP: 0010:tcp_rcvbuf_grow+0x187/0x450 net/ipv4/tcp_input.c:939 > ... > grow = div_u64(((u64)rcvwin << 1) * (newval - oldval), oldval); > > [...] Here is the summary with links: - [net] tcp: do not let tcp_rmem be set below 4096 https://git.kernel.org/netdev/net/c/83a945a529d6 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html