[PATCH] btrfs: Replace memcpy + NUL termination in _btrfs_printk
From: Thorsten Blum
Date: Sat Nov 29 2025 - 19:55:39 EST
Use strscpy() to copy the NUL-terminated source string 'fmt' to the
destination buffer 'lvl' instead of using memcpy() followed by a manual
NUL termination. No functional changes.
Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxx>
---
fs/btrfs/messages.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/messages.c b/fs/btrfs/messages.c
index a0cf8effe008..083e228e6d6c 100644
--- a/fs/btrfs/messages.c
+++ b/fs/btrfs/messages.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
+#include <linux/string.h>
#include "fs.h"
#include "messages.h"
#include "discard.h"
@@ -229,8 +230,7 @@ void __cold _btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt,
size_t size = printk_skip_level(fmt) - fmt;
if (kern_level >= '0' && kern_level <= '7') {
- memcpy(lvl, fmt, size);
- lvl[size] = '\0';
+ strscpy(lvl, fmt, size + 1);
type = logtypes[kern_level - '0'];
ratelimit = &printk_limits[kern_level - '0'];
}
--
Thorsten Blum <thorsten.blum@xxxxxxxxx>
GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4