From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4163013B799; Sun, 28 Jan 2024 16:15:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706458559; cv=none; b=EOMCx6tDapvSAzLeRxzjprXje9Fd3gTFAXXXW29WuzaEkW1BHcgHyt/TVp7Yx5q4aCxlKxOKskxMe+RHtAZlz2FPrjJZXTP9cyF1PsyVKcE+UkHcZ3Ph/2y4RBufT7tozSZkbrD49e7X7hxRXGdxUBSP/w564go2OPY4fNtiZXM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706458559; c=relaxed/simple; bh=lIoljhouP1oJTBFRiXsRV3C9KwRxMV61vpODY4Dof24=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=NGFgtXiTyW7G+ZzlFa0kHoQoq/Imj52C6GFgIzNiFobTHDICt6UIXjLi8AWx6agHWTlckqcwBQDA61jnkhwjFsnf9AWrZG5Bs/3hfvZwihO256gEXe2LmQTintFlVwlSHVNXsGwg7Br1KaRzbX6sNDeI2Y3pFJv1T1b/F3hVwcc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AoBB5fGl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AoBB5fGl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5FEFC43394; Sun, 28 Jan 2024 16:15:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706458559; bh=lIoljhouP1oJTBFRiXsRV3C9KwRxMV61vpODY4Dof24=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AoBB5fGlywsbZbfa75X7d2PBh4w4ZluNWhH7rltvLYc8OAqcxLoKfjyQK0dOaGIvx /LglXqCBlVVjSSTz8/fLUycC2Udf0RFPazJBDixoLkGPVUmOvbnaQ1OKG2kFuQZ3EM /IGy6fl9XenInP/g96IWFBJf22BNwGiEZ9EOPTyAe+9/oqioVtRTsw12L1r7PME2T7 9JZ99tokGMevBGkTa4V/DyoSHx3Erp/ZI6ZkLktL7UM/oYuZOvWv8ZI5dsYOyEhPxD RHruvjkA+U0q7h+mq+0Aj2n6dNRxKI3pc/Dum2x/sspqUZnN8jAoDYwZ0oBeN7uDiI QPVa4TvNKrToQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Srinivasan Shanmugam , Philip Yang , Felix Kuehling , =?UTF-8?q?Christian=20K=C3=B6nig?= , Alex Deucher , Felix Kuehling , Sasha Levin , Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.15 19/19] drm/amdkfd: Fix 'node' NULL check in 'svm_range_get_range_boundaries()' Date: Sun, 28 Jan 2024 11:15:16 -0500 Message-ID: <20240128161524.204182-19-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240128161524.204182-1-sashal@kernel.org> References: <20240128161524.204182-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.148 Content-Transfer-Encoding: 8bit From: Srinivasan Shanmugam [ Upstream commit d7a254fad873775ce6c32b77796c81e81e6b7f2e ] Range interval [start, last] is ordered by rb_tree, rb_prev, rb_next return value still needs NULL check, thus modified from "node" to "rb_node". Fixes the below: drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:2691 svm_range_get_range_boundaries() warn: can 'node' even be NULL? Suggested-by: Philip Yang Cc: Felix Kuehling Cc: Christian König Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index e2d4e2b42a7c..7f55decc5f37 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -2325,6 +2325,7 @@ svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr, { struct vm_area_struct *vma; struct interval_tree_node *node; + struct rb_node *rb_node; unsigned long start_limit, end_limit; vma = find_vma(p->mm, addr << PAGE_SHIFT); @@ -2341,16 +2342,15 @@ svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr, if (node) { end_limit = min(end_limit, node->start); /* Last range that ends before the fault address */ - node = container_of(rb_prev(&node->rb), - struct interval_tree_node, rb); + rb_node = rb_prev(&node->rb); } else { /* Last range must end before addr because * there was no range after addr */ - node = container_of(rb_last(&p->svms.objects.rb_root), - struct interval_tree_node, rb); + rb_node = rb_last(&p->svms.objects.rb_root); } - if (node) { + if (rb_node) { + node = container_of(rb_node, struct interval_tree_node, rb); if (node->last >= addr) { WARN(1, "Overlap with prev node and page fault addr\n"); return -EFAULT; -- 2.43.0