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Date:      Sat, 13 May 2017 06:50:13 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 219250] [Panic] [VIMAGE] panic: in6_ifattach_linklocal (assigning ipv6 addresses in vnet jail)
Message-ID:  <bug-219250-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219250

            Bug ID: 219250
           Summary: [Panic] [VIMAGE] panic: in6_ifattach_linklocal
                    (assigning ipv6 addresses in vnet jail)
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: reshadpatuck1@gmail.com

Created attachment 182557
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D182557&action=
=3Dedit
core.txt file for the panic

Hey,

While ruining some tests with about 20 vnet jails with pf and netgraph I get
this panic.

I have attached the core.txt for the panic to this post.

>From what I can understand there sees to be some issue assigning ipv6 addre=
sses
to epairs in the vnet jail.

Please let me know if there is any other information or something else I can
help with.

Kernel version r318025

---

panic: in6_ifattach_linklocal: ia =3D=3D NULL, ifp=3D0xfffff801b9828000

---

(kgdb) backtrace=20
#0  __curthread () at ./machine/pcpu.h:232
#1  doadump (textdump=3D0) at /usr/src/sys/kern/kern_shutdown.c:318
#2  0xffffffff803a308b in db_dump (dummy=3D<optimized out>, dummy2=3D<error=
 reading
variable: access outside bounds of object referenced via synthetic pointer>,
dummy3=3D<unavailable>, dummy4=3D<unavailable>) at
/usr/src/sys/ddb/db_command.c:546
#3  0xffffffff803a2e7f in db_command (last_cmdp=3D<optimized out>,
cmd_table=3D<optimized out>, dopager=3D<optimized out>) at
/usr/src/sys/ddb/db_command.c:453
#4  0xffffffff803a2bb4 in db_command_loop () at
/usr/src/sys/ddb/db_command.c:506
#5  0xffffffff803a5c7f in db_trap (type=3D<optimized out>, code=3D<optimize=
d out>)
at /usr/src/sys/ddb/db_main.c:248
#6  0xffffffff80a95673 in kdb_trap (type=3D3, code=3D-61456, tf=3D<optimize=
d out>) at
/usr/src/sys/kern/subr_kdb.c:654
#7  0xffffffff80ef0de6 in trap (frame=3D0xfffffe1043e13310) at
/usr/src/sys/amd64/amd64/trap.c:537
#8  <signal handler called>
#9  kdb_enter (why=3D0xffffffff8145adfd "panic", msg=3D<optimized out>) at
/usr/src/sys/kern/subr_kdb.c:444
#10 0xffffffff80a533f9 in vpanic (fmt=3D<optimized out>, ap=3D0xfffffe1043e=
134a0)
at /usr/src/sys/kern/kern_shutdown.c:772
#11 0xffffffff80a53236 in kassert_panic (fmt=3D0xffffffff8149b825 "%s: ia =
=3D=3D
NULL, ifp=3D%p") at /usr/src/sys/kern/kern_shutdown.c:669
#12 0xffffffff80c7805b in in6_ifattach_linklocal (ifp=3D<optimized out>,
altifp=3D<optimized out>) at /usr/src/sys/netinet6/in6_ifattach.c:505
#13 in6_ifattach (ifp=3D0xfffff801b9828000, altifp=3D<optimized out>) at
/usr/src/sys/netinet6/in6_ifattach.c:747
#14 0xffffffff80b462ea in if_route (flag=3D1, fam=3D0, ifp=3D<optimized out=
>) at
/usr/src/sys/net/if.c:2148
#15 if_up (ifp=3D0xfffff801b9828000) at /usr/src/sys/net/if.c:2233
#16 0xffffffff80b47f93 in ifhwioctl (cmd=3D<optimized out>, ifp=3D<optimize=
d out>,
td=3D0xfffff8002d117000, data=3D<optimized out>) at /usr/src/sys/net/if.c:2=
452
#17 ifioctl (so=3D<optimized out>, cmd=3D<optimized out>, data=3D<optimized=
 out>,
td=3D<optimized out>) at /usr/src/sys/net/if.c:2821
#18 0xffffffff80aba11d in fo_ioctl (fp=3D<optimized out>, com=3D2149607696,
active_cred=3D<optimized out>, td=3D<optimized out>, data=3D<optimized out>=
) at
/usr/src/sys/sys/file.h:323
#19 kern_ioctl (td=3D<optimized out>, fd=3D<optimized out>, com=3D<optimize=
d out>,
data=3D0xfffffe1043e132d0 "") at /usr/src/sys/kern/sys_generic.c:836
#20 0xffffffff80ab9ddf in sys_ioctl (td=3D<optimized out>,
uap=3D0xfffffe1043e13930) at /usr/src/sys/kern/sys_generic.c:745
#21 0xffffffff80ef2059 in syscallenter (td=3D0xfffff8002d117000, sa=3D<opti=
mized
out>) at /usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:136
#22 amd64_syscall (td=3D0xfffff8002d117000, traced=3D0) at
/usr/src/sys/amd64/amd64/trap.c:902
#23 <signal handler called>
#24 0x0000000800fd9dfa in ?? ()
Backtrace stopped: Cannot access memory at address 0x7fffffffdd88

---

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