Date: Mon, 4 Sep 2023 10:13:49 +0000 From: Souradeep Chakrabarti <schakrabarti@microsoft.com> To: "freebsd-hackers@FreeBSD.org" <freebsd-hackers@freebsd.org>, "freebsd-arm@FreeBSD.org" <freebsd-arm@FreeBSD.org> Cc: Wei Hu <weh@microsoft.com> Subject: FreeBSD arm64 Azure panic during reboot in add_route Message-ID: <PUZP153MB07888CFDD2AB9105920A1C29CCE9A@PUZP153MB0788.APCP153.PROD.OUTLOOK.COM>
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Hi I am working on bringing FreeBSD on Azure ARM64. When I am rebooting the Fr= eeBSD arm64 in Azure public preview, we are hitting following panic sometime for page fault: db_trace_self_wrapper() at db_trace_self_wrapper+0x30 vpanic() at vpanic+0x13c panic() at panic+0x44 data_abort() at data_abort+0x30c handle_el1h_sync() at handle_el1h_sync+0x14 --- exception, esr 0x8600000e (null)() at 0xffffa0000c93bb00 add_route() at add_route+0xc4 add_route_flags() at add_route_flags+0x1b0 rib_add_route() at rib_add_route+0x324 ifa_maintain_loopback_route() at ifa_maintain_loopback_route+0xf4 in6_update_ifa() at in6_update_ifa+0x994 in6_ifattach() at in6_ifattach+0x1bc in6_if_up() at in6_if_up+0x90 if_up() at if_up+0xd8 ifhwioctl() at ifhwioctl+0xb7c ifioctl() at ifioctl+0x860 kern_ioctl() at kern_ioctl+0x2dc sys_ioctl() at sys_ioctl+0x118 do_el0_sync() at do_el0_sync+0x520 handle_el0_sync() at handle_el0_sync+0x44 The panic is coming when add_route is called for loopback interface ipv6 at= tachment. Upon more investigating it looks like the panic happens in rib_notify() . Please let me know how to debug it further to find the RC. I have already opened a bug to track it : https://bugs.freebsd.org/bugzilla= /show_bug.cgi?id=3D272666 Regards, Souradeep
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