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Commit 3c235a33 authored by Li Zefan's avatar Li Zefan Committed by Ingo Molnar
Browse files

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



Leave the last slot for the tailing '\0'.

Signed-off-by: default avatarLi 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: default avatarIngo Molnar <mingo@elte.hu>
parent b8c7f1dc

kernel/trace/trace.c

+1 −1
Original line number Diff line number Diff line
@@ -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;