From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 1E63046BF2; Wed, 23 Jul 2025 16:20:05 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 0E9E340DDB; Wed, 23 Jul 2025 16:20:05 +0200 (CEST) Received: from mail-qt1-f171.google.com (mail-qt1-f171.google.com [209.85.160.171]) by mails.dpdk.org (Postfix) with ESMTP id 98CA140B9B for ; Wed, 23 Jul 2025 16:20:03 +0200 (CEST) Received: by mail-qt1-f171.google.com with SMTP id d75a77b69052e-4ab61ecc1e8so50346881cf.1 for ; Wed, 23 Jul 2025 07:20:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1753280403; x=1753885203; darn=dpdk.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=X++PqkzTwKSCO824UUEqknn/NJxwHF0Yk0Aw9RK0dPU=; b=PrmD9LnDuq7bIPeAlbhFcHChvjS6EDt52yHQntOmjfzCLd9ADVXtpH/IVFzTHabjBT ErjRXFsrznnlyfaFSO7FF+cdZfyv+EgG00Tty7UGzubWoVHEIoO++0nexr7vcgOlCa/v 008ZKZeSx8VnjguM1kJ7rsK291GPStMBOKuzMlTYIpImaaDhwoxej9qZ0jfjOPgMxQlN mlBti54M4cbnLvfO8ZCM/NgzV0WbrNZG0h8h+YpYNJx3sl18oeMX1jaUETIzpxtbfdXV 9FwnEcCwopvJv/nJyQglfV8QCogebJhu2AzoCq8GR3kvy4xCti0EJk+s8WwQ8N6zE6QO IJCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1753280403; x=1753885203; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=X++PqkzTwKSCO824UUEqknn/NJxwHF0Yk0Aw9RK0dPU=; b=kn2nohduvlrkjT/HelxFOSayFFNUw5DPv1N0ktxN+7ObU+I9oX17FPsRtgafSGaogH R5tXr5RgHZFFFdpYAi71jkrrjQDm8CDLabxAqntQ4PhhYNfKeO2T37fYizTzEEuMiUjR na3bNbLHFwm0eVBfj05/AxLoTxJqpOKftY3t4/aHJevrGhWVhM0t5s+x/3qEJ80NsB8w grSZuhZgSet5IGZ89HojDmQ621SXS+npJZfiKp7HkkP1hyFRRvAHcdFasmy5u4AnR1p+ BH9RgDr6WqZG+sTbfasQ8PjVCYhR5zWCX2GCnVzWFbedeHYfC3QM2M1LqxHFIz4Y9Iqx bhbQ== X-Gm-Message-State: AOJu0YyByFBOygTaEmjOkRNqGGGLJyyOIner0rKgxXJJC7t+tp0Qwkrm Y+o0qGMSLrxuU4prGVi6+l77zH2BOs1zvTXdjlAbij/dmVy6oyBq6i9bS5qhqjrR/DI= X-Gm-Gg: ASbGncuCS+VURNvtY5IAqK/tmtZfXKIxJwA6ndUrEDH3lCa6X9JVbcuWANgmlaOFKnZ hx3RjM58PbT44p52c1pQ3BiWKBEoW8B+o/DHykJttupRypve2F6onV3RN9z4iAUmemsWbjsiC+E g56Sx3C1VH2qQh0xz8U+FSABS5n+qFOSiJkVkxIZKtMhzQvp/WpeUPhXK5Zm9jf6oZD0txIgWpm XQFkEE/U4HmtwBa/VohxUD/GMvmxSpR55g0bmzCy5HUjsitVEPNWoALXkA/IHycuh4iUb07s0Mw TgopXrBC0iJ48mBbGvnIRvAXGnql2wRQ8jVkardN8Ea+EpbIYtC9ix56usdyv9w8yRr92InTfY0 WthfhtzzOJj/D1Ot/C9gBw4gZayHwar2MTdda+2isuuH1gEFS5Zm/AYNicL/OMlf3uvGcIPPVio w= X-Google-Smtp-Source: AGHT+IFk7SJLLBOhnLLGQSXWcc1yfUEE4m5/ZP9oEZkpkMXgcslBlPDhqQY0MNbh607QIC6o4zw/2Q== X-Received: by 2002:a05:622a:306:b0:4ab:609f:d7c3 with SMTP id d75a77b69052e-4ae6de2ca75mr39910551cf.1.1753280402736; Wed, 23 Jul 2025 07:20:02 -0700 (PDT) Received: from hermes.local (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4abb4b2643dsm65961801cf.53.2025.07.23.07.20.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Jul 2025 07:20:02 -0700 (PDT) Date: Wed, 23 Jul 2025 07:19:59 -0700 From: Stephen Hemminger To: Khadem Ullah <14pwcse1224@uetpeshawar.edu.pk> Cc: dev@dpdk.org, rasland@nvidia.com, stable@dpdk.org Subject: Re: [PATCH] net/mlx5: fix crash when secondary queries dev info after primary exits Message-ID: <20250723071959.4deac326@hermes.local> In-Reply-To: <20250721073851.963141-1-14pwcse1224@uetpeshawar.edu.pk> References: <20250721073851.963141-1-14pwcse1224@uetpeshawar.edu.pk> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On Mon, 21 Jul 2025 03:38:51 -0400 Khadem Ullah <14pwcse1224@uetpeshawar.edu.pk> wrote: > When the primary process exits, the shared mlx5 state becomes > unavailable to secondary processes. If a secondary process attempts > to query device information (e.g., via testpmd), a NULL dereference > may occur due to missing shared data. > > This patch adds a check for shared context availability and fails > gracefully while preventing a crash. > > Fixes: e60fbd5b24fc ("mlx5: add device configure/start/stop") > Cc: stable@dpdk.org > > Signed-off-by: Khadem Ullah <14pwcse1224@uetpeshawar.edu.pk> > --- How and when is the secondary process monitoring the primary process. If the secondary does not monitor then it is broken.