If rq_state == ARRAY_SIZE() then we read one element beyond the end of
the blk_mq_rq_state_name_array[] array.
Fixes: ec6dcf63c55c ("blk-mq-debugfs: Show more request state information")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index ffa622366922..1c4532e92938 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -356,7 +356,7 @@ static const char *const blk_mq_rq_state_name_array[] = {
static const char *blk_mq_rq_state_name(enum mq_rq_state rq_state)
{
- if (WARN_ON_ONCE((unsigned int)rq_state >
+ if (WARN_ON_ONCE((unsigned int)rq_state >=
ARRAY_SIZE(blk_mq_rq_state_name_array)))
return "(?)";
return blk_mq_rq_state_name_array[rq_state];
--
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