diff options
Diffstat (limited to 'kernel/trace/trace_uprobe.c')
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index ea0d90a31fc9..fdf2ea4d64ec 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -17,7 +17,7 @@ * Copyright (C) IBM Corporation, 2010-2012 * Author: Srikar Dronamraju <srikar@linux.vnet.ibm.com> */ -#define pr_fmt(fmt) "trace_kprobe: " fmt +#define pr_fmt(fmt) "trace_uprobe: " fmt #include <linux/module.h> #include <linux/uaccess.h> @@ -153,7 +153,14 @@ static void FETCH_FUNC_NAME(memory, string)(struct pt_regs *regs, ret = strncpy_from_user(dst, src, maxlen); if (ret == maxlen) - dst[--ret] = '\0'; + dst[ret - 1] = '\0'; + else if (ret >= 0) + /* + * Include the terminating null byte. In this case it + * was copied by strncpy_from_user but not accounted + * for in ret. + */ + ret++; if (ret < 0) { /* Failed to fetch string */ ((u8 *)get_rloc_data(dest))[0] = '\0'; |