tracing/filters: NIL-terminate user input filter
commit8433a40eb7f2c4883ad57f9900f63e4d59240eb7
authorLi Zefan <lizf@cn.fujitsu.com>
Sat, 11 Apr 2009 07:52:18 +0000 (11 15:52 +0800)
committerIngo Molnar <mingo@elte.hu>
Sun, 12 Apr 2009 09:59:27 +0000 (12 11:59 +0200)
tree7fab36945d0266ca00a9a13c2061cc2a0a2ae5dc
parent0462b5664b2bda5a18fef7efb5bb32ce36590c1a
tracing/filters: NIL-terminate user input filter

Make sure messages from user space are NIL-terminated strings,
otherwise we could dump random memory while reading filter file.

Try this:
 # echo 'parent_comm ==' > events/sched/sched_process_fork/filter
 # cat events/sched/sched_process_fork/filter
 parent_comm == �

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <49E04C32.6060508@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/trace/trace_events.c