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authorKarsten Keil <kkeil@suse.de>2007-03-01 07:13:50 +0300
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-02 01:53:39 +0300
commit17f0cd2f350b90b28301e27fe0e39f34bfe7e730 (patch)
tree6baba85d4f3b83398dc5a412b328bfcef1633548 /include/linux/isdn
parent34bbd704051c9d053d69e90569a3a2365f4c7b50 (diff)
downloadlinux-17f0cd2f350b90b28301e27fe0e39f34bfe7e730.tar.xz
[PATCH] Fix buffer overflow and races in capi debug functions
The CAPI trace debug functions were using a fixed size buffer, which can be overflowed if wrong formatted CAPI messages were sent to the kernel capi layer. The code was also not protected against multiple callers. This fix bug 8028. Additionally the patch make the CAPI trace functions optional. Signed-off-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/isdn')
-rw-r--r--include/linux/isdn/capiutil.h21
1 files changed, 19 insertions, 2 deletions
diff --git a/include/linux/isdn/capiutil.h b/include/linux/isdn/capiutil.h
index 2e79f816703b..63bd9cf821a7 100644
--- a/include/linux/isdn/capiutil.h
+++ b/include/linux/isdn/capiutil.h
@@ -174,9 +174,26 @@ char *capi_info2str(__u16 reason);
/*
* Debugging / Tracing functions
*/
+
char *capi_cmd2str(__u8 cmd, __u8 subcmd);
-char *capi_cmsg2str(_cmsg * cmsg);
-char *capi_message2str(__u8 * msg);
+
+typedef struct {
+ u_char *buf;
+ u_char *p;
+ size_t size;
+ size_t pos;
+} _cdebbuf;
+
+#define CDEBUG_SIZE 1024
+#define CDEBUG_GSIZE 4096
+
+_cdebbuf *cdebbuf_alloc(void);
+void cdebbuf_free(_cdebbuf *cdb);
+int cdebug_init(void);
+void cdebug_exit(void);
+
+_cdebbuf *capi_cmsg2str(_cmsg *cmsg);
+_cdebbuf *capi_message2str(__u8 *msg);
/*-----------------------------------------------------------------------*/