[xen-unstable] Fix string length check for vsnprintf() in debugtrace_printk().

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[xen-unstable] Fix string length check for vsnprintf() in debugtrace_printk().

Xen patchbot-unstable
# HG changeset patch
# User Keir Fraser <[hidden email]>
# Date 1196254224 0
# Node ID bb31c9325d5f86629de342a6515c6f28b92cf782
# Parent  43b7d24acf9c05d557fd0623ab6e495e630cf0d0
Fix string length check for vsnprintf() in debugtrace_printk().
Signed-off-by: Christoph Egger <[hidden email]>
---
 xen/drivers/char/console.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 43b7d24acf9c -r bb31c9325d5f xen/drivers/char/console.c
--- a/xen/drivers/char/console.c Wed Nov 28 12:44:46 2007 +0000
+++ b/xen/drivers/char/console.c Wed Nov 28 12:50:24 2007 +0000
@@ -835,7 +835,7 @@ void debugtrace_printk(const char *fmt,
     snprintf(buf, sizeof(buf), "%u ", ++count);
 
     va_start(args, fmt);
-    (void)vsnprintf(buf + strlen(buf), sizeof(buf), fmt, args);
+    (void)vsnprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), fmt, args);
     va_end(args);
 
     if ( debugtrace_send_to_console )

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