packet: Do not leak dev refcounts on error exit

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[ Upstream commit d972f3dce8 ]

'dev' is non NULL when the addr_len check triggers so it must goto a label
that does the dev_put otherwise dev will have a leaked refcount.

This bug causes the ib_ipoib module to become unloadable when using
systemd-network as it triggers this check on InfiniBand links.

Fixes: 99137b7888 ("packet: validate address length")
Reported-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jason Gunthorpe 2019-01-08 23:27:06 +00:00 • committed by Greg Kroah-Hartman

parent 50265bcad4

commit 58f453e319

1 changed files with 2 additions and 2 deletions

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net/packet/af_packet.c

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