lkml.org 
[lkml]   [2019]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.2 73/94] RDMA/cma: fix null-ptr-deref Read in cma_cleanup
Date
[ Upstream commit a7bfb93f0211b4a2f1ffeeb259ed6206bac30460 ]

In cma_init, if cma_configfs_init fails, need to free the
previously memory and return fail, otherwise will trigger
null-ptr-deref Read in cma_cleanup.

cma_cleanup
cma_configfs_exit
configfs_unregister_subsystem

Fixes: 045959db65c6 ("IB/cma: Add configfs for rdma_cm")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Link: https://lore.kernel.org/r/1566188859-103051-1-git-send-email-zhengbin13@huawei.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/core/cma.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 19f1730a4f244..a68d0ccf67a43 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -4724,10 +4724,14 @@ static int __init cma_init(void)
if (ret)
goto err;

- cma_configfs_init();
+ ret = cma_configfs_init();
+ if (ret)
+ goto err_ib;

return 0;

+err_ib:
+ ib_unregister_client(&cma_client);
err:
unregister_netdevice_notifier(&cma_nb);
ib_sa_unregister_client(&sa_client);
--
2.20.1


\
 
 \ /
  Last update: 2019-09-08 14:53    [W:0.214 / U:0.352 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site