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tracing: Fix off-by-one in trace_get_user()

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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>
This commit is contained in:
Li Zefan 2009-09-22 13:51:54 +08:00 committed by Ingo Molnar
parent b8c7f1dc5c
commit 3c235a337e
1 changed files with 1 additions and 1 deletions
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kernel/trace/trace.c
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@ -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;