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[v2,09/15] IB/rxe: Add a runtime check in alloc_index()

Message ID 20170110191554.17359-10-bart.vanassche@sandisk.com (mailing list archive)
State Accepted
Headers show

Commit Message

Bart Van Assche Jan. 10, 2017, 7:15 p.m. UTC 
Since index values equal to or above 'range' can trigger memory
corruption, complain if index >= range.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Andrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
---
 drivers/infiniband/sw/rxe/rxe_pool.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c
index 7d1e2862b928..75d11ee635ec 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -266,6 +266,7 @@  static u32 alloc_index(struct rxe_pool *pool)
 	if (index >= range)
 		index = find_first_zero_bit(pool->table, range);
 
+	WARN_ON_ONCE(index >= range);
 	set_bit(index, pool->table);
 	pool->last = index;
 	return index + pool->min_index;