Kernel panic on kernel-3.10.0-693.21.1.el7 in ndisc.h

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Hello,

We have a problem with Kernel panic after upgrade from CentOS 7.3
(kernel-3.10.0-514.el7) to CentOS 7.4 (kernel-3.10.0-693.21.1.el7).
It occurs when we have the incoming traffic from other nodes and we
are performing the re-configuration of IPv6 interfaces.

It is high-availability system without 802.15.4 support.

The log of crash:
=========================================================
#10 [ffff88043fc03cf0] async_page_fault at ffffffff816b7798
    [exception RIP: ndisc_send_rs+238]
    RIP: ffffffff8166575e  RSP: ffff88043fc03da8  RFLAGS: 00010202
    RAX: 0000000000000002  RBX: ffff88042caa9000  RCX: 0000000000000001
    RDX: 0000000000000000  RSI: 0000000000000200  RDI: ffffffff816534f7
    RBP: ffff88043fc03dd0   R8: 0000000000000000   R9: ffffffff81e9f1c0
    R10: 0000000000000002  R11: ffff88043fc03da8  R12: 0000000000000008
    R13: 0000000000000006  R14: ffff88043fc03de0  R15: ffffffff81772410
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#11 [ffff88043fc03da0] ndisc_send_rs at ffffffff81665704
=========================================================

I see that crash points on ndisc.h, it is ndisc_ops_opt_addr_space()
in function:
=========================================================
crash> kmem ffffffff8166575e
ffffffff8166575e (T) ndisc_send_rs+238
/usr/src/debug/kernel-3.10.0-693.21.1.el7/linux-3.10.0-693.21.1.el7.x86_64/include/net/ndisc.h:
251

      PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
ffffea0000059940   1665000                0        0  1 1fffff00000400 reserved
crash>
=========================================================

I checked the difference between 514 and 693 kernels is in the patch
https://patchwork.kernel.org/patch/9179229/ .

Any suggesions about what I am doing wrong are welcome.

Thanks!
Roman Makhov
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