%u requires 10 characters at most not 20. Signed-off-by: Alexey Dobriyan <adobriyan(a)gmail.com&gt; --- fs/proc/base.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1243,7 +1243,7 @@ static const struct file_operations proc_oom_score_adj_operations = { }; #ifdef CONFIG_AUDITSYSCALL -#define TMPBUFLEN 21 +#define TMPBUFLEN 11 static ssize_t proc_loginuid_read(struct file * file, char __user * buf, size_t count, loff_t *ppos) {