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IB/rxe: Add a runtime check in alloc_index()

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[ Upstream commit 642c7cbcaf2ffc1e27f67eda3dc47347ac5aff37 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bart Van Assche 2017-01-10 11:15:48 -08:00 committed by Greg Kroah-Hartman
parent 2b7aec8839
commit 0081b9e7fc
1 changed files with 1 additions and 0 deletions
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drivers/infiniband/sw/rxe/rxe_pool.c
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@ -274,6 +274,7 @@ 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;