linux/drivers/infiniband
Shay Drory cb5cd0ea4e RDMA/core: Add CM to restrack after successful attachment to a device
The device attach triggers addition of CM_ID to the restrack DB.
However, when error occurs, we releasing this device, but defer CM_ID
release. This causes to the situation where restrack sees CM_ID that
is not valid anymore.

As a solution, add the CM_ID to the resource tracking DB only after the
attachment is finished.

Found by syzcaller:
infiniband syz0: added syz_tun
rdma_rxe: ignoring netdev event = 10 for syz_tun
infiniband syz0: set down
infiniband syz0: ib_query_port failed (-19)
restrack: ------------[ cut here    ]------------
infiniband syz0: BUG: RESTRACK detected leak of resources
restrack: User CM_ID object allocated by syz-executor716 is not freed
restrack: ------------[ cut here    ]------------

Fixes: b09c4d7012 ("RDMA/restrack: Improve readability in task name management")
Link: https://lore.kernel.org/r/ab93e56ba831eac65c322b3256796fa1589ec0bb.1618753862.git.leonro@nvidia.com
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-04-21 20:53:14 -03:00
..
core RDMA/core: Add CM to restrack after successful attachment to a device 2021-04-21 20:53:14 -03:00
hw RDMA/mlx5: Expose private query port 2021-04-20 17:00:18 -03:00
sw RDMA/rxe: Fix a bug in rxe_fill_ip_info() 2021-04-21 16:09:04 -03:00
ulp IB/ipoib: Remove unnecessary struct declaration 2021-04-20 09:34:39 -03:00
Kconfig RDMA/umem: Support importing dma-buf as user memory region 2021-01-20 16:07:52 -04:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00