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RDMA/core: Fix null-ptr-deref in ib_core_cleanup()

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[ Upstream commit 07c0d131cc ]

KASAN reported a null-ptr-deref error:

  KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f]
  CPU: 1 PID: 379
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
  RIP: 0010:destroy_workqueue+0x2f/0x740
  RSP: 0018:ffff888016137df8 EFLAGS: 00000202
  ...
  Call Trace:
   ib_core_cleanup+0xa/0xa1 [ib_core]
   __do_sys_delete_module.constprop.0+0x34f/0x5b0
   do_syscall_64+0x3a/0x90
   entry_SYSCALL_64_after_hwframe+0x63/0xcd
  RIP: 0033:0x7fa1a0d221b7
  ...

It is because the fail of roce_gid_mgmt_init() is ignored:

 ib_core_init()
   roce_gid_mgmt_init()
     gid_cache_wq = alloc_ordered_workqueue # fail
 ...
 ib_core_cleanup()
   roce_gid_mgmt_cleanup()
     destroy_workqueue(gid_cache_wq)
     # destroy an unallocated wq

Fix this by catching the fail of roce_gid_mgmt_init() in ib_core_init().

Fixes: 03db3a2d81 ("IB/core: Add RoCE GID table management")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Link: https://lore.kernel.org/r/20221025024146.109137-1-chenzhongjin@huawei.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chen Zhongjin 2022-10-25 10:41:46 +08:00 committed by Greg Kroah-Hartman
parent 4d2024b138
commit ab817f75e5
2 changed files with 10 additions and 2 deletions
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10
drivers/infiniband/core/device.c
View file

@ -2815,10 +2815,18 @@ static int __init ib_core_init(void)
nldev_init();
rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table);
roce_gid_mgmt_init();
ret = roce_gid_mgmt_init();
if (ret) {
pr_warn("Couldn't init RoCE GID management\n");
goto err_parent;
}
return 0;
err_parent:
rdma_nl_unregister(RDMA_NL_LS);
nldev_exit();
unregister_pernet_device(&rdma_dev_net_ops);
err_compat:
unregister_blocking_lsm_notifier(&ibdev_lsm_nb);
err_sa:

2
drivers/infiniband/core/nldev.c
View file

@ -2537,7 +2537,7 @@ void __init nldev_init(void)
rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);
}
void __exit nldev_exit(void)
void nldev_exit(void)
{
rdma_nl_unregister(RDMA_NL_NLDEV);
}