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| author | Kalderon, Michal <Michal.Kalderon@cavium.com> | 2017-07-06 23:22:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-03 08:12:10 +0200 |
| commit | 6ca9a3f3d7b68a489bda98b17d83fd025d815639 (patch) | |
| tree | 6435991904b11de0a7ba2083c0eba8a409a5572d | |
| parent | e15a251e107952553c210ae76cccc04f6b8a3784 (diff) | |
| download | linux-stable-6ca9a3f3d7b68a489bda98b17d83fd025d815639.tar.gz linux-stable-6ca9a3f3d7b68a489bda98b17d83fd025d815639.tar.bz2 linux-stable-6ca9a3f3d7b68a489bda98b17d83fd025d815639.zip | |
IB/cma: Fix reference count leak when no ipv4 addresses are set
commit 963916fdb3e5ad4af57ac959b5a03bf23f7568ca upstream.
Once in_dev_get is called to receive in_device pointer, the
in_device reference counter is increased, but if there are
no ipv4 addresses configured on the net-device the ifa_list
will be null, resulting in a flow that doesn't call in_dev_put
to decrease the ref_cnt.
This was exposed when running RoCE over ipv6 without any ipv4
addresses configured
Fixes: commit 8e3867310c90 ("IB/cma: Fix a race condition in iboe_addr_get_sgid()")
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 d77416963f05..72f3b0d65435 100644 --- a/include/rdma/ib_addr.h +++ b/include/rdma/ib_addr.h @@ -200,11 +200,13 @@ 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 = in_dev_get(dev); - if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) { + if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, (struct in6_addr *)gid); + + if (ip4) in_dev_put(ip4); - } + dev_put(dev); } } |