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authorLi Zefan <lizf@cn.fujitsu.com>2009-09-22 13:51:54 +0800
committerIngo Molnar <mingo@elte.hu>2009-09-22 10:28:53 +0200
commit3c235a337e205da0f614e456be72881483dcde6e (patch)
tree73dee892e0cf269793c2193e235d9701fa9a3115 /kernel
parentb8c7f1dc5ca4e0d10709182233cdab932cef593d (diff)
tracing: Fix off-by-one in trace_get_user()
Leave the last slot for the tailing '\0'. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4AB865FA.5080801@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a35925d222b..ae17453dc0f 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;