panic: Assertion in_epoch(net_epoch_preempt) failed at ... src/sys/net/if.c:3694
Nick Hibma
nick at van-laarhoven.org
Tue Jan 21 20:09:35 UTC 2020
That (with the return added, thanks Cy) worked like a charm.
Thanks for the fast response.
Nick Hibma
nick at van-laarhoven.org
-- Open Source: We stand on the shoulders of giants.
> On 21 Jan 2020, at 18:38, Alexander V. Chernikov <melifaro at freebsd.org> wrote:
>
> 21.01.2020, 17:25, "Nick Hibma" <nick at van-laarhoven.org>:
>> When using a trivial program to read from the divert socket and post back the machine panics instantly when a packet is sent to userland and back again (incoming packet for the interface, so ifname is set). This is current from today with no changes
>>
>> Any pointers as to how to fix this?
> Could you please try to apply an attached patch and try again?
>>
>> Thanks in advance for any help.
>>
>> Nick Hibma
>> nick at van-laarhoven.org
>>
>> -- Open Source: We stand on the shoulders of giants.
>>
>> Unread portion of the kernel message buffer:
>> panic: Assertion in_epoch(net_epoch_preempt) failed at /usr/src/sys/netinet/in.c:968
>> cpuid = 0
>> time = 1579626632
>> KDB: stack backtrace:
>> db_trace_self_wrapper(3836393a,1a9000a,0,1fdc088c,bd5320,...) at db_trace_self_wrapper+0x2a/frame 0x1fdc0860
>> kdb_backtrace(2,1e03ebc,1fdc08e8,14683a4,20b72500,...) at kdb_backtrace+0x2e/frame 0x1fdc08c0
>> vpanic(1461278,1fdc0904,1fdc0904,1fdc0918,11355ac,...) at vpanic+0x11f/frame 0x1fdc08e4
>> panic(1461278,1512573,154b440,3c8,20b72500,...) at panic+0x14/frame 0x1fdc08f8
>> in_broadcast(f02000a,94df400,20b72594,1dc0ae8,2001be24,...) at in_broadcast+0x8c/frame 0x1fdc0918
>> div_send(2001bcc0,0,20b72500,9082e10,0,177f1a80) at div_send+0x1bd/frame 0x1fdc0958
>> sosend_generic(2001bcc0,9082e10,1fdc0a18,0,0,0,177f1a80) at sosend_generic+0x3c5/frame 0x1fdc09b4
>> sosend(2001bcc0,9082e10,1fdc0a18,0,0,...) at sosend+0x50/frame 0x1fdc09e4
>> kern_sendit(177f1a80,3,1fdc0aa0,0,0,0) at kern_sendit+0x1b4/frame 0x1fdc0a50
>> sendit(1fdc0aa0,0) at sendit+0x196/frame 0x1fdc0a88
>> sys_sendto(177f1a80,177f1d0c) at sys_sendto+0x50/frame 0x1fdc0ac8
>> syscall(1fdc0ba8,3b,3b,3b,54,...) at syscall+0x2db/frame 0x1fdc0b9c
>> Xint0x80_syscall() at 0xffc033c9/frame 0x1fdc0b9c
>> --- syscall (133, FreeBSD ELF32, sys_sendto), eip = 0xffc01230, esp = 0xffc07fe8, ebp = 0xffbfeb68 ---
>> KDB: enter: panic
>>
>> 0x00fd1129 in doadump (textdump=0) at /usr/src/sys/kern/kern_shutdown.c:392
>> 392 savectx(&dumppcb);
>> (kgdb) quit
>> {e}nick at fimkjecurrent:/home/nick % svn info /usr/src
>> Path: /usr/src
>> Working Copy Root Path: /usr/src
>> URL: svn+ssh://repo.freebsd.org/base/head
>> Relative URL: ^/head
>> Repository Root: svn+ssh://repo.freebsd.org/base
>> Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
>> Revision: 356907
>> Node Kind: directory
>> Schedule: normal
>> Last Changed Author: jhibbits
>> Last Changed Rev: 356904
>> Last Changed Date: 2020-01-20 05:01:35 +0100 (Mon, 20 Jan 2020)
>>
>>> On 9 Oct 2019, at 14:04, David Wolfskill <david at catwhisker.org> wrote:
>>>
>>> On Tue, Oct 08, 2019 at 05:15:19AM -0700, David Wolfskill wrote:
>>>> This was on my laptop (build machine, which was updated in parallel,
>>>> but uses a different NIC, had no issues) after a src update from
>>>> r353176 to r353298; laptop's NIC is wlan(4) (which is iwn(4), in
>>>> this case).
>>>
>>> After restoring the /boot/*.old set, I was able to reboot & update from
>>> r353298 to r353336. The subsequent reboot seemed OK ... until the
>>> keyboard & mouse were enabled (under X11; I use xdm on the laptop).
>>>
>>> Then I got a slightly different panic:
>>>
>>> panic: Assertion in_epoch(net_epoch_preempt) failed at /usr/src/sys/net/if.c:356
>>>
>>> Backtrace:
>>>
>>> panic: Assertion in_epoch(net_epoch_preempt) failed at /usr/src/sys/net/if.c:356
>>> cpuid = 0
>>> time = 1570621553
>>> KDB: stack backtrace:
>>> db_trace_self_wrapper() at 0xffffffff8049ebab = db_trace_self_wrapper+0x2b/frame 0xfffffe1072956580
>>> vpanic() at 0xffffffff80b978fd = vpanic+0x19d/frame 0xfffffe10729565d0
>>> panic() at 0xffffffff80b97693 = panic+0x43/frame 0xfffffe1072956630
>>> if_ref() at 0xffffffff80ca1b10 = if_ref/frame 0xfffffe1072956650
>>> sysctl_ifdata() at 0xffffffff80cb247d = sysctl_ifdata+0x4d/frame 0xfffffe1072956760
>>> sysctl_root_handler_locked() at 0xffffffff80ba714b = sysctl_root_handler_locked+0x7b/frame 0xfffffe10729567a0
>>> sysctl_root() at 0xffffffff80ba64dc = sysctl_root+0x20c/frame 0xfffffe1072956820
>>> userland_sysctl() at 0xffffffff80ba6bab = userland_sysctl+0x17b/frame 0xfffffe10729568d0
>>> sys___sysctl() at 0xffffffff80ba69ef = sys___sysctl+0x5f/frame 0xfffffe1072956980
>>> amd64_syscall() at 0xffffffff810480f4 = amd64_syscall+0x2d4/frame 0xfffffe1072956ab0
>>> fast_syscall_common() at 0xffffffff8101eaa0 = fast_syscall_common+0x101/frame 0xfffffe1072956ab0
>>> --- syscall (202, FreeBSD ELF64, sys___sysctl), rip = 0x8014d4d2a, rsp = 0x7fffffffeaa8, rbp = 0x7fffffffeae0 ---
>>> KDB: enter: panic
>>>
>>>> The ddb "dump" command recorded a dump, which I managed to capture; the
>>>> information may be found at
>>>> http://www.catwhisker.org/~david/FreeBSD/head/r353298/
>>>
>>> This one is at http://www.catwhisker.org/~david/FreeBSD/head/r353336
>>>
>>> As before, the (headless) build machine had no issues that I could see.
>>>
>>> Peace,
>>> david
>>> --
>>> David H. Wolfskill david at catwhisker.org
>>> I am amazed that anyone would condone what Trunp has publicly admitted he did.
>>>
>>> See http://www.catwhisker.org/~david/publickey.gpg for my public key.
>>
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