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 768B13FE356; Tue, 21 Jul 2026 19:17:00 +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=1784661421; cv=none; b=CsyLv/q9k5r0ZnKu5O+PzDn2NZZan5bmtwV96NifwaRXdexL3c2I4YEZsRHQqwbNviGmpsegRJIijqc0HOePo3M4bTWxg8dgFNBjGWcuM9zshBt55Rts0RX9bCQbyKtF+XyTyTBk6ivSGxDSvwcTajTE2XY+eZJQZykCeNpowBM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784661421; c=relaxed/simple; bh=X5tiSLHloATc/xiw40rapfe+JQ1cSeua/OGtWUr3GxI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=lgkbqna9PyyNO0DLT9NU/QnuNKZ2xR78J2mO3F/y9uHNaML2R0yRkJyVeHEu4Q/KLD9x4QBo7hbrR/GBy42VYfsh1nPpL3dwBJL12hbZ8MBb4XZmTxPecOSEEkiAXMnSKE1EiHGyzXnCrCzoriFPc69CHavMxuYO8XZ8yHJ5Mo0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=n+YGgnAn; 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="n+YGgnAn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D20AA1F000E9; Tue, 21 Jul 2026 19:16:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784661420; bh=OibURoF58wsOeDJToUksO/XzBDm8DMLeHrdjJPFfr5E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=n+YGgnAnOKMUX5EZq1W6wPr2u/R4mIX6r4T1VlHBfdcNUrdFigHheLHd53fedacbP Fw9HsRBXtMCmYKdsKvoQ7JB1uq/MFM1E12e29TlORQcb1kPQ4wJUOJcxZPp/vkyf7K qRq0J17mTnfppUANwhyEu55U/ZrWcb7xrI3OpIr8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jonathan Cavitt , Matthew Brost , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , Krzysztof Karas , Sasha Levin Subject: [PATCH 6.12 0061/1276] drm/gpuvm: Do not prepare NULL objects Date: Tue, 21 Jul 2026 17:08:24 +0200 Message-ID: <20260721152447.450062103@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152446.065700225@linuxfoundation.org> References: <20260721152446.065700225@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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jonathan Cavitt [ Upstream commit 88f059f6f6f589bd78e2ceb05a1339a8c10b8626 ] Statis analysis issue: drm_gpuvm_prepare_range issues an exec_object_prepare call to all drm_gem_objects mapped between addr and addr + range. However, it is possible (albeit very unlikely) that the objects found through drm_gpuvm_for_each_va_range (as connected to va->gem) are NULL, as seen in other functions such as drm_gpuva_link and drm_gpuva_unlink_defer. Do not prepare NULL objects. Fixes: 50c1a36f594b ("drm/gpuvm: track/lock/validate external/evicted objects") Signed-off-by: Jonathan Cavitt Cc: Matthew Brost Cc: Thomas Hellström Reviewed-by: Krzysztof Karas Link: https://patch.msgid.link/20260130191953.61718-2-jonathan.cavitt@intel.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_gpuvm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_gpuvm.c b/drivers/gpu/drm/drm_gpuvm.c index f9eb56f24bef29..0321820e9bab77 100644 --- a/drivers/gpu/drm/drm_gpuvm.c +++ b/drivers/gpu/drm/drm_gpuvm.c @@ -1219,6 +1219,9 @@ drm_gpuvm_prepare_range(struct drm_gpuvm *gpuvm, struct drm_exec *exec, drm_gpuvm_for_each_va_range(va, gpuvm, addr, end) { struct drm_gem_object *obj = va->gem.obj; + if (unlikely(!obj)) + continue; + ret = exec_prepare_obj(exec, obj, num_fences); if (ret) return ret; -- 2.53.0