From: Josh Law <objecting@objecting.org>
Date: Wed, 18 Mar 2026 15:59:16 +0000 (+0000)
Subject: lib/bootconfig: use size_t for strlen result in xbc_node_match_prefix()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=68f479de0e013d0c27432240f35bf2a3cc3260f6;p=thirdparty%2Fkernel%2Flinux.git

lib/bootconfig: use size_t for strlen result in xbc_node_match_prefix()

  lib/bootconfig.c:198:19: warning: conversion from 'size_t' to 'int'
  may change value [-Wconversion]
  lib/bootconfig.c:200:33: warning: conversion to '__kernel_size_t'
  from 'int' may change the sign of the result [-Wsign-conversion]

strlen() returns size_t but the result was stored in an int.  The value
is then passed back to strncmp() which expects size_t, causing a second
sign-conversion warning on the round-trip.  Use size_t throughout to
match the API types.

Link: https://lore.kernel.org/all/20260318155919.78168-11-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 94ae6662531d5..9f059bb68e410 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -195,7 +195,7 @@ static bool __init
 xbc_node_match_prefix(struct xbc_node *node, const char **prefix)
 {
 	const char *p = xbc_node_get_data(node);
-	int len = strlen(p);
+	size_t len = strlen(p);
 
 	if (strncmp(*prefix, p, len))
 		return false;