Commit-ID: 3c235a337e205da0f614e456be72881483dcde6e
Gitweb: http://git.kernel.org/tip/3c235a337e205da0f614e456be72881483dcde6e
Author: Li Zefan <lizf@xxxxxxxxxxxxxx>
AuthorDate: Tue, 22 Sep 2009 13:51:54 +0800
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 22 Sep 2009 10:28:53 +0200
tracing: Fix off-by-one in trace_get_user()
Leave the last slot for the tailing '\0'.
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
LKML-Reference: <4AB865FA.5080801@xxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/trace/trace.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a35925d..ae17453 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -415,7 +415,7 @@ int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
/* read the non-space input */
while (cnt && !isspace(ch)) {
- if (parser->idx < parser->size)
+ if (parser->idx < parser->size - 1)
parser->buffer[parser->idx++] = ch;
else {
ret = -EINVAL;
--
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