[PATCH RESEND 3/3] percpu_ida: Sanity check initialization parameters

From: Alexander Gordeev
Date: Thu Feb 06 2014 - 07:23:41 EST


Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
Cc: Kent Overstreet <kmo@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: "Nicholas A. Bellinger" <nab@xxxxxxxxxxxxxxx>
---
lib/percpu_ida.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/lib/percpu_ida.c b/lib/percpu_ida.c
index c2fa3dc..81b5ae9 100644
--- a/lib/percpu_ida.c
+++ b/lib/percpu_ida.c
@@ -305,6 +305,11 @@ int __percpu_ida_init(struct percpu_ida *pool, unsigned long nr_tags,
{
unsigned i, cpu, order;

+ if (batch_size > max_size)
+ return -ERANGE;
+ if (!batch_size)
+ return -EINVAL;
+
memset(pool, 0, sizeof(*pool));

init_waitqueue_head(&pool->wait);
--
1.7.7.6

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