From 9f6f095beec82a80daa666a3b2186a5b95841e9a Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 17 Aug 2026 18:11:30 +0200 Subject: [PATCH] usb: f_mass_storage: Bump local buffer size in fsg_common_create_luns() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit GCC (Debian 14.2.0-19) is not happy about the buffer size: drivers/usb/gadget/function/f_mass_storage.c:2970:48: error: ‘%d’ directive output may be truncated writing between 1 and 9 bytes into a region of size 5 [-Werror=format-truncation=] Bump the size to get it enough for all possible values. Note, although cfg->nluns is limited to FSG_MAX_LUNS (16), the compiler doesn't realize this and complains about the buffer size. Also note, the existing comment is wrong as size 8 for the whole buffer doesn't cover 100 mil numbers, hence drop it altogether. Fixes: b27c08c953e9 ("usb: gadget: f_mass_storage: create lun creation helpers for use in fsg_common_init") Cc: stable Acked-by: Alan Stern Signed-off-by: Andy Shevchenko Link: https://patch.msgid.link/20260817161239.1448582-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/function/f_mass_storage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index a50743caf083..1a0fbc808ee2 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -2960,7 +2960,7 @@ EXPORT_SYMBOL_GPL(fsg_common_create_lun); int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg) { - char buf[8]; /* enough for 100000000 different numbers, decimal */ + char buf[14]; int i, rc; fsg_common_remove_luns(common);