Date: Wed, 30 Dec 2015 05:54:07 -0800 From: David Wolfskill <david@catwhisker.org> To: current@freebsd.org Subject: Panic in ld_ldt() @r292914 (amd64) -- just after launching CPUs Message-ID: <20151230135407.GH1222@albert.catwhisker.org>
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[-- Attachment #1 --] Found this on both my build machine and my laptop, each of which just built head @r292914 (while running r292864 during the build) -- e.g.: FreeBSD g1-252.catwhisker.org 11.0-CURRENT FreeBSD 11.0-CURRENT #287 r292864M/292864:1100092: Tue Dec 29 05:01:42 PST 2015 root@g1-252.catwhisker.org:/common/S4/obj/usr/src/sys/CANARY amd64 Unfortunately, the panic occurs early enough that I can't get a crash dump (I'm don't think the swap device has yet been discovered), and serial console isn't working for my build machine. I took some screen shots of the laptop, but I don't seem to be able to connect the phone to the laptop in a way to allow data interchange, so I'll try to hand-transcribe the more obviously-relevant bits: ... SMP: AP CPU #5 Launched! kernel trap 9 with interrupts disabled Fatal trap 9: general protection fault while in kernel mode cpuid = 6; apic id = 86 instruction pointer = 0x28:0xffffffff80d9b505 stack pointer = 0x28:0xfffffe06015ca8f0 frame pointer = 0x28:0xfffffe06015ca950 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = resume, IOPL = 0 current process = 11 (idle: cpu6) [ thread pid 11 tid 100010 ] Stopped at 0xffffffff80d9b505 = ld_ldt: lldt %ax db> bt Tracing pid 11 tid 100010 td 0xfffff800067f69a0 ld_ldt() at 0xffffffff80d9b505 = ld_ldt/frame 0xfffffe06015ca900 sched_switch() at 0xffffffff80a176c5 = sched_switch+0x495/frame 0xfffffe06015ca950 mi_switch() at 0xffffffff809f8759 = mi_switch+0x169/frame 0xfffffe06015ca980 sched_idletd() at 0xffffffff80a1a211 = sched_idletd+0x391/frame 0xfffffe06015caa70 fork_exit() at 0xffffffff809b5324 = fork_exit+0x84/frame 0xfffffe06015aab0 fork_trampoline() at 0xffffffff80d9eade = fork_trampoline+0xe/frame 0xfffffe06015caab0 --- trap 0, rip = 0, rsp = 0, rpb = 0 --- db> I'm happy to try testing, but as I actually use the laptop for day-to-day activities, I'm likely to need to do some priority-shifting. Peace, david -- David H. Wolfskill david@catwhisker.org Those who would murder in the name of God or prophet are blasphemous cowards. See http://www.catwhisker.org/~david/publickey.gpg for my public key. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAEBCgBmBQJWg+H/XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRDQ0I3Q0VGOTE3QTgwMUY0MzA2NEQ3N0Ix NTM5Q0M0MEEwNDlFRTE3AAoJEBU5zECgSe4XA+wH/0reEmpGBzwL73iKO+dr8Edc UWHkadR07iJvVeCDGKBG+8vvUIa8JDjJuVtEtcEVmxVsLUiKmyMPJF49wLkdpQqZ 3pvoLoIYGRZEKuIMcCXUjrkr0Nh7NGKkl6Zsv114tU1sHnZYKUulK42nQQ5CFMq/ t+gSU9L6ctylcM7U4Rq8nm/Q5rqmyUmSlW4FCs9pXoJJ9zot4c0WEh7MHUn/yGhh I5lwdtvVMY8nZhoYeslEleXU7Ks8Clr5xOm/SMIcRN4JHWzQqHzFz39wd7GpQscP NBJDe9Z7SehbxBEo6wwhmvP5UQxfHb/WwqTEnBphm9Hg1QtL7Ton7qIOX9iVg9s= =7aFs -----END PGP SIGNATURE-----
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