Module Name: src
Committed By: christos
Date: Sat Jul 27 15:45:20 UTC 2024
Modified Files:
src/sys/net: if_wg.c
Log Message:
Limit the size of the packet, and print ... if it is bigger. (from kre@)
To generate a diff of this commit:
cvs rdiff -u -r1.92 -r1.93 src/sys/net/if_wg.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/net/if_wg.c
diff -u src/sys/net/if_wg.c:1.92 src/sys/net/if_wg.c:1.93
--- src/sys/net/if_wg.c:1.92 Fri Jul 26 14:34:35 2024
+++ src/sys/net/if_wg.c Sat Jul 27 11:45:20 2024
@@ -1,4 +1,4 @@
-/* $NetBSD: if_wg.c,v 1.92 2024/07/26 18:34:35 riastradh Exp $ */
+/* $NetBSD: if_wg.c,v 1.93 2024/07/27 15:45:20 christos Exp $ */
/*
* Copyright (C) Ryota Ozaki <[email protected]>
@@ -41,7 +41,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wg.c,v 1.92 2024/07/26 18:34:35 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wg.c,v 1.93 2024/07/27 15:45:20 christos Exp $");
#ifdef _KERNEL_OPT
#include "opt_altq_enabled.h"
@@ -245,20 +245,26 @@ static bool wg_force_underload = false;
static char enomem[10] = "[enomem]";
+#define MAX_HDUMP_LEN 10000 /* large enough */
+
+
static char *
gethexdump(const void *vp, size_t n)
{
char *buf;
const uint8_t *p = vp;
- size_t i;
+ size_t i, alloc;
- if (n > (SIZE_MAX - 1) / 3)
- return enomem;
- buf = kmem_alloc(3 * n + 1, KM_NOSLEEP);
+ alloc = n;
+ if (n > MAX_HDUMP_LEN)
+ alloc = MAX_HDUMP_LEN;
+ buf = kmem_alloc(3 * alloc + 5, KM_NOSLEEP);
if (buf == NULL)
return enomem;
- for (i = 0; i < n; i++)
+ for (i = 0; i < alloc; i++)
snprintf(buf + 3 * i, 3 + 1, " %02hhx", p[i]);
+ if (alloc != n)
+ snprintf(buf + 3 * i, 4 + 1, " ...");
return buf;
}
@@ -268,7 +274,9 @@ puthexdump(char *buf, const void *p, siz
if (buf == NULL || buf == enomem)
return;
- kmem_free(buf, 3*n + 1);
+ if (n > MAX_HDUMP_LEN)
+ n = MAX_HDUMP_LEN;
+ kmem_free(buf, 3 * n + 5);
}
#ifdef WG_RUMPKERNEL
