From a93cc9b9c56870fe134fe2006a1f46d9557ec780 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Vincent=20Stehl=C3=A9?= Date: Mon, 7 Apr 2025 19:05:29 +0200 Subject: [PATCH] arm64: zynqmp: fix dfu alt buffer clearing MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The set_dfu_alt_info() function calls the ALLOC_CACHE_ALIGN_BUFFER() macro to declare a `buf' variable pointer into an array allocated on the stack. It then calls the memset() function to clear the useable portion of the array using the idiomatic expression `sizeof(buf)'. While this would indeed work fine for an array, in the present case we end up clearing only the size of a pointer. Fix this by specifying the explicit size `DFU_ALT_BUF_LEN' instead. Fixes: b86f43de0be0 ("xilinx: zynqmp: Add support for runtime dfu_alt_info setup") Signed-off-by: Vincent Stehlé Cc: Michal Simek Cc: Tom Rini Acked-by: Padmarao Begari Link: https://lore.kernel.org/r/20250407170529.893307-6-vincent.stehle@arm.com --- board/xilinx/zynqmp/zynqmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c index 33205d4cf1d..735ef3cd1be 100644 --- a/board/xilinx/zynqmp/zynqmp.c +++ b/board/xilinx/zynqmp/zynqmp.c @@ -668,7 +668,7 @@ void configure_capsule_updates(void) ALLOC_CACHE_ALIGN_BUFFER(char, buf, DFU_ALT_BUF_LEN); - memset(buf, 0, sizeof(buf)); + memset(buf, 0, DFU_ALT_BUF_LEN); multiboot = multi_boot(); if (multiboot < 0) -- 2.39.5