mirror_ubuntu-kernels/drivers/infiniband
Li Zhijian 8ff5f5d9d8 RDMA/rxe: Prevent double freeing rxe_map_set()
The same rxe_map_set could be freed twice:

rxe_reg_user_mr()
  -> rxe_mr_init_user()
    -> rxe_mr_free_map_set() # 1st

  -> rxe_drop_ref()
   ...
    -> rxe_mr_cleanup()
      -> rxe_mr_free_map_set() # 2nd

Follow normal convection and put resource cleanup either in the error
unwind of the allocator, or the overall free function. Leave the object
unchanged with a NULL cur_map_set on failure and remove the unncessary
free in rxe_mr_init_user().

Link: https://lore.kernel.org/r/20211228014406.1033444-1-lizhijian@cn.fujitsu.com
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Acked-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2022-01-04 10:29:34 -04:00
..
core RDMA/nldev: Check stat attribute before accessing it 2021-11-17 16:45:16 -04:00
hw RDMA/hns: Replace kfree() with kvfree() 2021-12-14 20:13:29 -04:00
sw RDMA/rxe: Prevent double freeing rxe_map_set() 2022-01-04 10:29:34 -04:00
ulp RDMA/rtrs: Call {get,put}_cpu_ptr to silence a debug kernel warning 2021-11-29 10:56:18 -04:00
Kconfig RDMA/irdma: Add irdma Kconfig/Makefile and remove i40iw 2021-06-02 20:06:36 -03:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00