lkml.org 
[lkml]   [2021]   [Dec]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 03/19] kallsyms: use the correct buffer size for symbols
Date
From: Boqun Feng <boqun.feng@gmail.com>

The buffered name size should be larger than `KSYM_NAME_LEN`, otherwise
we cannot tell whether the size of a symbol name is too long.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
scripts/kallsyms.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 72ba0fe4e43b..0e37c19d84af 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -27,6 +27,9 @@

#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))

+#define _stringify_1(x) #x
+#define _stringify(x) _stringify_1(x)
+
#define KSYM_NAME_LEN 512

struct sym_entry {
@@ -197,15 +200,15 @@ static void check_symbol_range(const char *sym, unsigned long long addr,

static struct sym_entry *read_symbol(FILE *in)
{
- char name[500], type;
+ char name[KSYM_NAME_LEN+1], type;
unsigned long long addr;
unsigned int len;
struct sym_entry *sym;
int rc;

- rc = fscanf(in, "%llx %c %499s\n", &addr, &type, name);
+ rc = fscanf(in, "%llx %c %" _stringify(KSYM_NAME_LEN) "s\n", &addr, &type, name);
if (rc != 3) {
- if (rc != EOF && fgets(name, 500, in) == NULL)
+ if (rc != EOF && fgets(name, KSYM_NAME_LEN + 1, in) == NULL)
fprintf(stderr, "Read error or end of file.\n");
return NULL;
}
--
2.34.0
\
 
 \ /
  Last update: 2021-12-06 15:06    [W:0.187 / U:1.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site