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Patch in this message | | | From | "Levin, Alexander (Sasha Levin)" <> | Subject | [PATCH for 4.9 29/59] IB/rxe: Add a runtime check in alloc_index() | Date | Thu, 14 Sep 2017 15:51:13 +0000 |
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From: Bart Van Assche <bart.vanassche@sandisk.com>
[ 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> --- drivers/infiniband/sw/rxe/rxe_pool.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c index 6bac0717c540..ee26a1b1b4ed 100644 --- a/drivers/infiniband/sw/rxe/rxe_pool.c +++ b/drivers/infiniband/sw/rxe/rxe_pool.c @@ -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; -- 2.11.0
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