From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f177.google.com (mail-pf1-f177.google.com [209.85.210.177]) (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 28EC93D1CC1 for ; Fri, 5 Jun 2026 22:01:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780696918; cv=none; b=FcWS4X4kBgitHLxifvGBxKaR6r6FBaXJYogVXAIDPvJ4pVkPlFxotcnvakuzLziZXv4P4qy9DuCvHYq3y+krQBvH/8XSoyqp7zLEW00VHsF98UfODDIt8nObVjW/886mAPY7DFW/OPOQ/pftlP8i+zJcNehtujw5GYHKHl1RdQg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780696918; c=relaxed/simple; bh=dv4UoT3DiDLV5e+jIsTNR9SdROP2j8QTT16qF0sniOo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BXun7vAlsKgbKUPdIvmHlY1xNxKZGfOwSSaNeR6DA5OCgLIwRabYguCShc48dF/2d0hPNAUo7n0H9mR48uSXm4jM9VlZesp6B2tiuDycjnxf4nAIpiLlaEz5mYmsxUHe5oJVwLoG2Ua64As/EmyB9uFph4B7EutIxREt539bvEY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=CvcTHSUW; arc=none smtp.client-ip=209.85.210.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CvcTHSUW" Received: by mail-pf1-f177.google.com with SMTP id d2e1a72fcca58-84234c83142so1018174b3a.1 for ; Fri, 05 Jun 2026 15:01:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1780696916; x=1781301716; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+5mTbmbGFqfQuWANwj/hsm3FmxeOXZxoynp4ibqSmkc=; b=CvcTHSUWxzm5dd9oPvh9Bzft88/cglbH4+hUhke5GOPwyZNhQ/U9r2ZFiJy3ObgE99 WUF+pwE2ShYfCticxb8DMW1gQ6n5z+BuRaTIbw/+A/i2plIyHQ2Pk855qppjSbIwRjx2 hrgPfAL/19/qpSR3Z0TmEkWTx7GYfMz2hOopwwSvANsoDutwEFSOEq0e8yf9jXijagTv rin0TnyNpjoSY6GNQvYvMKOD9rVJnEgYNBJ6p4wJHuX4pGt2lHBOAtDxnDl16goMwRlw QF4CMpvixH2lro7YvAjhM0Yx73/uNhmAu701kb1b+5aNh1wzgA0JvzD7+DXSl61PjQUw kR9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780696916; x=1781301716; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=+5mTbmbGFqfQuWANwj/hsm3FmxeOXZxoynp4ibqSmkc=; b=aNzcVaYgBcONZlTBeq/wMFd8/qlKLxQv51Kw9QqgTuTMJDMj7oXSVmsskQMmrqRDpp /FMkzubT7qMHDLL5PDzESC0phkUuF4ffoOxLrqSDSc1iFpBOAphPvScxyOqGpGRPs51j ikFYG5dkthjaUe1e4dxskOla+DEv/haGkbcySG19FGa5gr6GoJ0Dgho5zNO3oLZjNRXG uwWBKKSkbxeOeOqrEKvm/QeM6JZhjb5isZJHzZvXvG7Eup8jQbtBnA4r2sG5uPBsEITc R4zyPzXPri+iXG68CDAlZ4ik5oUgOyqN2g46OxpFFne2Uy4cWXj9Gf4QaqetHPcEyoOr P+tQ== X-Forwarded-Encrypted: i=1; AFNElJ9DoTAXZwbjEXUAHDRnHNOJ20Iq7WvZf4eXuBHnaQj0XqOe0wymnnpNbf0lLYU3f69YaREP98KNRnMVZgs=@vger.kernel.org X-Gm-Message-State: AOJu0YwG14+CeL5cQgPeiJuEGn88v4fkdrtjwz/Mj+GuZkEw+TV4xPpC OQ69hCeroALlI8ruv8oMmBWW7yyZEy2lM+/CP3OGgRPydarz0MTRdLjE X-Gm-Gg: Acq92OG79QwiEpLPMne70j3am+nwswNcBumBpxsLwZAcLdg6QaX/dmSgZQsaP6sy7Vk 3+w1/IFDMk1HKV8itVLDZWmImPKmH9gALl79oGT4YSOqtga+IPWS4uONM29q2+QDD/qT9rc1n3R W4z318C0L4T6IdeYeBGrxc6rzNEwocQk3FVaWNCqT+CiofHnr1rldIU9Z+93kPRYFRA8nY733EH e1rx+Fo7B0Aa5akO4LkMIK6OhOr3YOyDjJ354+tksWB0BCjEOcHep2cXEzVEP8CJOAB+obsSfTt gCusPOUoqG2xV9k+J0O/wZkcUbWNN2eNiozjhOgohfHtU93Di8rN+8NY55XqOOuj2yGQ8Ie3XfM iBFJBO1aCnJp1CqN+NPcrgM5DRP5cIXHEHxbQ7Vh7EG3cx54KBln1teTRkuwPhS4RGditRswDUK zB+o/dB245SklQBYDvG4izuZ2VZpHy/tccWPJYg1NTAUXfnkZENOv5hlC6zXw+LDekOBl4qS9YK CYdmCjZubH34XvGIhEaSK/TEAyLsDXnfAsE5ye76/mFcB1y6fNBKflj X-Received: by 2002:a05:6a00:3692:b0:842:5da3:9b84 with SMTP id d2e1a72fcca58-842b0fb2843mr5346862b3a.34.1780696916252; Fri, 05 Jun 2026 15:01:56 -0700 (PDT) Received: from ryzen ([2601:644:8000:5b5d:7285:c2ff:fe45:8a32]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-842824a1cb4sm12518883b3a.26.2026.06.05.15.01.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Jun 2026 15:01:55 -0700 (PDT) From: Rosen Penev To: dmaengine@vger.kernel.org Cc: Vinod Koul , Frank Li , Zhang Wei , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , linux-kernel@vger.kernel.org (open list), linuxppc-dev@lists.ozlabs.org (open list:FREESCALE DMA DRIVER), llvm@lists.linux.dev (open list:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b) Subject: [PATCH 02/10] dmaengine: fsldma: check dma_async_device_register() return value Date: Fri, 5 Jun 2026 15:01:26 -0700 Message-ID: <20260605220134.43295-3-rosenp@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260605220134.43295-1-rosenp@gmail.com> References: <20260605220134.43295-1-rosenp@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Check the return value of dma_async_device_register() in the probe path and propagate errors instead of silently returning success. Previously, a registration failure would cause a NULL pointer dereference in list_del_rcu() during remove when dma_async_device_unregister() tried to remove the device's global_node from a list it was never added to. Assisted-by: opencode:big-pickle Signed-off-by: Rosen Penev --- drivers/dma/fsldma.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index 0e2f84862261..89b88447be1b 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -1293,7 +1293,11 @@ static int fsldma_of_probe(struct platform_device *op) goto out_free_fdev; } - dma_async_device_register(&fdev->common); + err = dma_async_device_register(&fdev->common); + if (err) { + dev_err(fdev->dev, "unable to register DMA device\n"); + goto out_free_fdev; + } return 0; out_free_fdev: -- 2.54.0