On Thu, Jun 16, 2016 at 7:03 PM, Mark Felder wrote:
> Hello,
>
> I can pretty reliably panic CURRENT by creating/destroying gif and gre
> interfaces used for IPv6 tunnels. I'm uploading the dump, kernel.debug,
> and kernel in a tarball here:
>
> https://feld.me/freebsd/crash/r301929.tgz
>
> It's still uploading so you might end up with an incomplete download if
> you fetch it now. Here's the sha256 of it:
>
> 1e9fddad1da3bac2b11c51a18c7dad48eb9259acf844f35f5eb40630ca84de64
> r301929.tgz
>
>
> Here's the backtrace:
>
> (kgdb) bt
> #0 doadump (textdump=0) at pcpu.h:221
> #1 0x80391fab in db_dump (dummy=,
> dummy2=false, dummy3=0, dummy4=0x0) at /usr/src/sys/ddb/db_command.c:533
> #2 0x80391da9 in db_command (cmd_table=)
> at /usr/src/sys/ddb/db_command.c:440
> #3 0x80391b04 in db_command_loop () at
> /usr/src/sys/ddb/db_command.c:493
> #4 0x80394a3b in db_trap (type=,
> code=) at /usr/src/sys/ddb/db_main.c:251
> #5 0x80a88913 in kdb_trap (type=,
> code=, tf=) at
> /usr/src/sys/kern/subr_kdb.c:654
> #6 0x80eb8331 in trap_fatal (frame=0xfe0122831770, eva=26)
> at /usr/src/sys/amd64/amd64/trap.c:836
> #7 0x80eb857d in trap_pfault (frame=0xfe0122831770,
> usermode=0) at /usr/src/sys/amd64/amd64/trap.c:691
> #8 0x80eb7a64 in trap (frame=0xfe0122831770) at
> /usr/src/sys/amd64/amd64/trap.c:442
> #9 0x80e97f91 in calltrap () at
> /usr/src/sys/amd64/amd64/exception.S:236
> #10 0x80c57ebc in ip6_output (m0=,
> opt=, ro=, flags= optimized out>, im6o=0x0, ifpp=0x0, inp=)
> at /usr/src/sys/netinet6/ip6_output.c:1060
> #11 0x82661fd2 in dummynet_send (m=) at
> /usr/src/sys/modules/dummynet/../../netpfil/ipfw/ip_dn_io.c:800
> #12 0x82661890 in dummynet_task (context=,
> pending=) at
> /usr/src/sys/modules/dummynet/../../netpfil/ipfw/ip_dn_io.c:746
> #13 0x80a9a1ac in taskqueue_run_locked (queue= out>) at /usr/src/sys/kern/subr_taskqueue.c:465
> #14 0x80a9acf8 in taskqueue_thread_loop (arg= out>) at /usr/src/sys/kern/subr_taskqueue.c:719
> #15 0x80a0b3e4 in fork_exit (callout=0x80a9ac70
> , arg=0x8266c8a8,
> frame=0xfe0122831c00) at /usr/src/sys/kern/kern_fork.c:1038
> #16 0x80e984ce in fork_trampoline () at
> /usr/src/sys/amd64/amd64/exception.S:611
> #17 0x in ?? ()
> Current language: auto; currently minimal
>
>
> --
> Mark Felder
> ports-secteam member
> f...@freebsd.org
> ___
Yeah, FreeBSD has a problem with destroying any kind of cloned
interface. How many times, on average, do you need to destroy one
before you get the panic?
___
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