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Thu, 08 Oct 2026 09:41:25 -0700 (PDT) Received: from sheng2080.cmix.louisiana.edu ([130.70.15.5]) by smtp.gmail.com with ESMTPSA id 5614622812f47-4fc48e3de37sm6249298b6e.9.2026.10.08.09.41.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Oct 2026 09:41:24 -0700 (PDT) From: Leizhen Zhang To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com Cc: linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] tracepoint-update: do not reuse section pointers from a previous file Date: Thu, 8 Oct 2026 11:41:16 -0500 Message-Id: <20261008164117.3670267-1-lzsx618@gmail.com> X-Mailer: git-send-email 2.34.1 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_data_sec and tracepoint_data_sec are static and set while scanning the section headers in process_tracepoints(), but are never reset. When tracepoint-update is given several files and a later file lacks these sections, the pointers from the previous, already unmapped file are used, which crashes: $ scripts/tracepoint-update --module a.o c.o AddressSanitizer: SEGV ... Reset both pointers at the start of process_tracepoints(). Kbuild currently passes a single file per invocation, so this does not affect normal builds. Fixes: e30f8e61e251 ("tracing: Add a tracepoint verification check at build time") Assisted-by: Claude:claude-opus-5-5 ASan UBSan Signed-off-by: Leizhen Zhang --- v2: - Use my real name in the From and Signed-off-by lines. No code changes. v1: https://lore.kernel.org/r/20261005104200.1787946-1-lzsx618@gmail.com scripts/tracepoint-update.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/scripts/tracepoint-update.c b/scripts/tracepoint-update.c index 5cf43c0aac..4c4b669011 100644 --- a/scripts/tracepoint-update.c +++ b/scripts/tracepoint-update.c @@ -163,6 +163,10 @@ static int process_tracepoints(bool mod, void *addr, const char *fname) int idx; int done = 2; + /* Do not use the sections of a previously processed file */ + check_data_sec = NULL; + tracepoint_data_sec = NULL; + shdr_start = (Elf_Shdr *)((char *)ehdr + ehdr_shoff(ehdr)); shentsize = ehdr_shentsize(ehdr); -- 2.34.1