RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()
authorNikita Zhandarovich <n.zhandarovich@fintech.ru>
Thu, 2 Feb 2023 18:48:50 +0000 (10:48 -0800)
committerLeon Romanovsky <leon@kernel.org>
Mon, 6 Feb 2023 13:56:32 +0000 (15:56 +0200)
commit283861a4c52c1ea4df3dd1b6fc75a50796ce3524
tree5dc5d60282cd8c6fc6fc7acca9214523202bb5d8
parent85f9e38a5ac7d397f9bb5e57901b2d6af4dcc3b9
RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()

If get_ep_from_tid() fails to lookup non-NULL value for ep, ep is
dereferenced later regardless of whether it is empty.
This patch adds a simple sanity check to fix the issue.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 944661dd97f4 ("RDMA/iw_cxgb4: atomically lookup ep and get a reference")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Link: https://lore.kernel.org/r/20230202184850.29882-1-n.zhandarovich@fintech.ru
Signed-off-by: Leon Romanovsky <leon@kernel.org>
drivers/infiniband/hw/cxgb4/cm.c