From: Josh Law <objecting@objecting.org>
Date: Wed, 18 Mar 2026 15:59:18 +0000 (+0000)
Subject: lib/bootconfig: use size_t for key length tracking in xbc_verify_tree()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=05213e4b10b9bd2e121d3e73428404b4f920dd9a;p=thirdparty%2Fkernel%2Flinux.git

lib/bootconfig: use size_t for key length tracking in xbc_verify_tree()

  lib/bootconfig.c:839:24: warning: conversion from 'size_t' to 'int'
  may change value [-Wconversion]
  lib/bootconfig.c:860:32: warning: conversion from 'size_t' to 'int'
  may change value [-Wconversion]
  lib/bootconfig.c:860:29: warning: conversion to 'size_t' from 'int'
  may change the sign of the result [-Wsign-conversion]

The key length variables len and wlen accumulate strlen() results but
were declared as int, causing truncation and sign-conversion warnings.
Change both to size_t to match the strlen() return type and avoid
mixed-sign arithmetic.

Link: https://lore.kernel.org/all/20260318155919.78168-13-objecting@objecting.org/

Signed-off-by: Josh Law <objecting@objecting.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---

diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index 1f84748607b42..343aa96294647 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -803,7 +803,8 @@ static int __init xbc_close_brace(char **k, char *n)
 
 static int __init xbc_verify_tree(void)
 {
-	int i, depth, len, wlen;
+	int i, depth;
+	size_t len, wlen;
 	struct xbc_node *n, *m;
 
 	/* Brace closing */