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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