linux-stable/drivers/infiniband/sw
Xiao Yang cc4f596cf8 RDMA/rxe: Zero out index member of struct rxe_queue
1) New index member of struct rxe_queue was introduced but not zeroed so
   the initial value of index may be random.

2) The current index is not masked off to index_mask.

In this case producer_addr() and consumer_addr() will get an invalid
address by the random index and then accessing the invalid address
triggers the following panic:

"BUG: unable to handle page fault for address: ffff9ae2c07a1414"

Fix the issue by using kzalloc() to zero out index member.

Fixes: 5bcf5a59c4 ("RDMA/rxe: Protext kernel index from user space")
Link: https://lore.kernel.org/r/20210820111509.172500-1-yangx.jy@fujitsu.com
Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-08-20 15:48:58 -03:00
..
rdmavt Tracing updates for 5.14: 2021-07-03 11:13:22 -07:00
rxe RDMA/rxe: Zero out index member of struct rxe_queue 2021-08-20 15:48:58 -03:00
siw RDMA/siw: Release xarray entry 2021-05-10 14:06:45 -03:00
Makefile rdma/siw: addition to kernel build environment 2019-07-02 17:03:41 -03:00