diff options
| author |   Li Zefan <lizf@cn.fujitsu.com> | 2009-03-24 16:05:27 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-03-31 17:27:18 +0200 |
| commit | eb08f8eb0673d9c1e62b69ad1b41593e73c40467 (patch) | |
| tree | 8243201d6f98e5e502fd0688c632e9650c1f973d /kernel/trace | |
| parent | blktrace: fix the original blktrace (diff) | |
| download | linux-dev-eb08f8eb0673d9c1e62b69ad1b41593e73c40467.tar.xz linux-dev-eb08f8eb0673d9c1e62b69ad1b41593e73c40467.zip | |
blktrace: fix off-by-one bug
'what' is used as the index of array what2act, so it can't >= the array size.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/blktrace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index a7f7ff5db38b..d43cdac7c754 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -1152,7 +1152,7 @@ static enum print_line_t blk_trace_event_print(struct trace_iterator *iter, if (!trace_print_context(iter)) return TRACE_TYPE_PARTIAL_LINE; - if (unlikely(what == 0 || what > ARRAY_SIZE(what2act))) + if (unlikely(what == 0 || what >= ARRAY_SIZE(what2act))) ret = trace_seq_printf(s, "Bad pc action %x\n", what); else { const bool long_act = !!(trace_flags & TRACE_ITER_VERBOSE); @@ -1199,7 +1199,7 @@ static enum print_line_t blk_tracer_print_line(struct trace_iterator *iter) t = (const struct blk_io_trace *)iter->ent; what = t->action & ((1 << BLK_TC_SHIFT) - 1); - if (unlikely(what == 0 || what > ARRAY_SIZE(what2act))) + if (unlikely(what == 0 || what >= ARRAY_SIZE(what2act))) ret = trace_seq_printf(&iter->seq, "Bad pc action %x\n", what); else { const bool long_act = !!(trace_flags & TRACE_ITER_VERBOSE); |