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IB/rxe: Add a runtime check in alloc_index()
author
Bart Van Assche
<bart.vanassche@sandisk.com>
Tue, 10 Jan 2017 19:15:48 +0000
(11:15 -0800)
committer
Doug Ledford
<dledford@redhat.com>
Tue, 10 Jan 2017 21:52:47 +0000
(16:52 -0500)
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>
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/sw/rxe/rxe_pool.c
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diff --git
a/drivers/infiniband/sw/rxe/rxe_pool.c
b/drivers/infiniband/sw/rxe/rxe_pool.c
index
7d1e286
..
75d11ee
100644
(file)
--- 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;