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Fri, 31 Jan 2025 05:37:35 -0800 (PST) Date: Fri, 31 Jan 2025 13:37:35 +0000 From: Wei Yang To: Scall Cc: "Liam R. Howlett" , Andrew Morton , maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wei Yang Subject: Re: lib/maple_tree.c:4056:1: error: the frame size of 1144 bytes is larger than 1024 bytes Message-ID: <20250131133735.hq6kwncyb5uibe7j@master> Reply-To: Wei Yang References: <60cee319-4914-4a98-b74d-32e06fb3cbd8@prosemail.net> <8415a24a-a19e-46f6-bb56-dfd529143dd9@prosemail.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <8415a24a-a19e-46f6-bb56-dfd529143dd9@prosemail.net> User-Agent: NeoMutt/20170113 (1.7.2) X-Stat-Signature: gyp4k48kgir9ue3wdthnjp68p6gwgssb X-Rspam-User: X-Rspamd-Queue-Id: 4119840003 X-Rspamd-Server: rspam03 X-HE-Tag: 1738330658-548020 X-HE-Meta: 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 s94FRetj 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000005, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Jan 30, 2025 at 11:31:50PM +0100, Scall wrote: >On 1/30/25 5:13 PM, Liam R. Howlett wrote: >> Do you have KASAN or lock debugging on? > >No, I don't. > >> Does the issue go away when reverting 8c7904a8cd0df ("maple_tree: i is >> always less than or equal to mas_end") ? > >That commit has not been backported to the kernel version I tried to build >(6.12.11, currently the latest stable version). > >Good news: I learned that the issue has already been solved in the mainline >version with commit 5059aa6334fcf ("maple_tree: memset maple_big_node as a >whole") and backporting it is the solution. Hmm... I tried to reproduce this and found different gcc version may behave differently. An old version doesn't report warning while a later version does. With GCC 8.2.1, the latest master looks good. Even I use -O3. 7004a2e46d16 2025-01-22 Merge tag 'linux_kselftest-nolibc-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest But with GCC 11.4.0(I don't have the exact version as yours), the latest master still get a warning. But the message is a little bit different from yours: lib/maple_tree.c: In function ‘mas_wr_spanning_store’: lib/maple_tree.c:3804:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=] 3804 | } | ^ lib/maple_tree.c: In function ‘mas_wr_bnode’: lib/maple_tree.c:4065:1: warning: the frame size of 1048 bytes is larger than 1024 bytes [-Wframe-larger-than=] 4065 | } | ^ Then I tried to bisect it. And found similar warning even at the first maple tree commit 54a611b60590 ("Maple Tree: add new data structure"). Below is the warning message: lib/maple_tree.c: In function ‘mas_wr_spanning_store.isra’: lib/maple_tree.c:4047:1: warning: the frame size of 1032 bytes is larger than 1024 bytes [-Wframe-larger-than=] 4047 | } | ^ lib/maple_tree.c: In function ‘mas_wr_bnode’: lib/maple_tree.c:4325:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=] 4325 | } | ^ Hi, Liam Do you have some suggestion on what I can do to help? -- Wei Yang Help you, Help me