| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 027/104] IB/rxe: Add a runtime check in alloc_index() | Date | Fri, 6 Oct 2017 10:51:05 +0200 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/infiniband/sw/rxe/rxe_pool.c | 1 + 1 file changed, 1 insertion(+)
--- 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 * 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;
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