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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2016-12-19 18:00:05 +0100 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-01-15 09:49:52 -0500 |
| commit | 59e6ec3db8530af00d37344114f2f80b5e9a1914 (patch) | |
| tree | b075a5e82f12c66eec1607388c432ae6a20bf387 | |
| parent | c318c81453939e9632535432848013c243fede2e (diff) | |
| download | linux-stable-59e6ec3db8530af00d37344114f2f80b5e9a1914.tar.gz linux-stable-59e6ec3db8530af00d37344114f2f80b5e9a1914.tar.bz2 linux-stable-59e6ec3db8530af00d37344114f2f80b5e9a1914.zip | |
IB/cma: Fix a race condition in iboe_addr_get_sgid()
[ Upstream commit fba332b079029c2f4f7e84c1c1cd8e3867310c90 ]
Code that dereferences the struct net_device ip_ptr member must be
protected with an in_dev_get() / in_dev_put() pair. Hence insert
calls to these functions.
Fixes: commit 7b85627b9f02 ("IB/cma: IBoE (RoCE) IP-based GID addressing")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
| -rw-r--r-- | include/rdma/ib_addr.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h index ce55906b54a0..2ecac2032a3a 100644 --- a/include/rdma/ib_addr.h +++ b/include/rdma/ib_addr.h @@ -184,10 +184,12 @@ static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); if (dev) { - ip4 = (struct in_device *)dev->ip_ptr; - if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) + ip4 = in_dev_get(dev); + if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) { ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, (struct in6_addr *)gid); + in_dev_put(ip4); + } dev_put(dev); } } |