hyperv/hn: Fix panic in hypervisor code upon device detach event
Submitted by: hselasky Reviewed by: dexuan MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D16139
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=336426
@ -1161,6 +1161,13 @@ hn_ismyvf(const struct hn_softc *sc, const struct ifnet *ifp)
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strcmp(ifp->if_dname, "vlan") == 0)
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return (false);
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/*
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* During detach events ifp->if_addr might be NULL.
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* Make sure the bcmp() below doesn't panic on that:
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*/
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if (ifp->if_addr == NULL || hn_ifp->if_addr == NULL)
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return (false);
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if (bcmp(IF_LLADDR(ifp), IF_LLADDR(hn_ifp), ETHER_ADDR_LEN) != 0)
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return (false);
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