7_STABLE panic()

[Egerváry Gergely]

Before send_pr, let's have a look: probably GRE or IPFilter related?
Upstream connection is on a GRE tunnel.

0xffffffff804ce60f in cpu_reboot (howto=***@entry=260,
bootstr=***@entry=0x0)
at ../../../../arch/amd64/amd64/machdep.c:671
671 dumpsys();
(gdb) bt
#0 0xffffffff804ce60f in cpu_reboot (howto=***@entry=260,
bootstr=***@entry=0x0)
at ../../../../arch/amd64/amd64/machdep.c:671
#1 0xffffffff8066c1e2 in vpanic (fmt=***@entry=0xffffffff80a35300
"m_makewritable: length changed",
ap=***@entry=0xfffffe8040005c70) at ../../../../kern/subr_prf.c:340
#2 0xffffffff8066c29d in panic (fmt=***@entry=0xffffffff80a35300
"m_makewritable: length changed")
at ../../../../kern/subr_prf.c:256
#3 0xffffffff806f4d2c in m_makewritable
(mp=***@entry=0xfffffe8040005d30, off=***@entry=0, len=***@entry=-1,
how=***@entry=1) at ../../../../kern/uipc_mbuf.c:1355
#4 0xffffffff8040893c in ipf_check_wrapper (arg=<optimized out>,
mp=0xfffffe8040005d30, ifp=0xfffffe8116321008,
dir=2) at ../../../../external/bsd/ipf/netinet/ip_fil_netbsd.c:186
#5 0xffffffff8059a2ee in pfil_run_hooks (ph=<optimized out>,
mp=***@entry=0xfffffe8040005dd0,
ifp=***@entry=0xfffffe8116321008, dir=***@entry=2) at
../../../../net/pfil.c:266
#6 0xffffffff80425a3a in ip_output (m0=***@entry=0xfffffe80a5751400) at
../../../../netinet/ip_output.c:480
#7 0xffffffff805c5ee2 in rip_output (m=***@entry=0xfffffe80a5751400) at
../../../../netinet/raw_ip.c:389
#8 0xffffffff805c603d in rip_send (l=<optimized out>,
control=<optimized out>, nam=0x0, m=0xfffffe80a5751400,
so=0xfffffe810e4c2498) at ../../../../netinet/raw_ip.c:781
#9 rip_send_wrapper (a=0xfffffe810e4c2498, b=0xfffffe80a5751400, c=0x0,
d=<optimized out>, e=<optimized out>)
at ../../../../netinet/raw_ip.c:850
#10 0xffffffff8033aa41 in gre_sosend (top=0xfffffe80a5751400,
so=0xfffffe810e4c2498)
at ../../../../net/if_gre.c:536
#11 greintr (arg=0xfffffe810ae10008) at ../../../../net/if_gre.c:221
#12 0xffffffff804a3be4 in softint_execute (l=<optimized out>,
s=<optimized out>, si=<optimized out>)
at ../../../../kern/kern_softint.c:589
#13 softint_dispatch (pinned=<optimized out>, s=4) at
../../../../kern/kern_softint.c:871
#14 0xffffffff8011402f in Xsoftintr ()

thanks,
--
Gergely EGERVARY

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[Christos Zoulas]

Post by Egerváry Gergely
Before send_pr, let's have a look: probably GRE or IPFilter related?
Upstream connection is on a GRE tunnel.
at ../../../../arch/amd64/amd64/machdep.c:671
671 dumpsys();
(gdb) bt
at ../../../../arch/amd64/amd64/machdep.c:671
"m_makewritable: length changed",
"m_makewritable: length changed")
at ../../../../kern/subr_prf.c:256
#3 0xffffffff806f4d2c in m_makewritable
#4 0xffffffff8040893c in ipf_check_wrapper (arg=<optimized out>,
mp=0xfffffe8040005d30, ifp=0xfffffe8116321008,
dir=2) at ../../../../external/bsd/ipf/netinet/ip_fil_netbsd.c:186
#5 0xffffffff8059a2ee in pfil_run_hooks (ph=<optimized out>,
../../../../net/pfil.c:266
../../../../netinet/ip_output.c:480
../../../../netinet/raw_ip.c:389
#8 0xffffffff805c603d in rip_send (l=<optimized out>,
control=<optimized out>, nam=0x0, m=0xfffffe80a5751400,
so=0xfffffe810e4c2498) at ../../../../netinet/raw_ip.c:781
#9 rip_send_wrapper (a=0xfffffe810e4c2498, b=0xfffffe80a5751400, c=0x0,
d=<optimized out>, e=<optimized out>)
at ../../../../netinet/raw_ip.c:850
#10 0xffffffff8033aa41 in gre_sosend (top=0xfffffe80a5751400,
so=0xfffffe810e4c2498)
at ../../../../net/if_gre.c:536
#11 greintr (arg=0xfffffe810ae10008) at ../../../../net/if_gre.c:221
#12 0xffffffff804a3be4 in softint_execute (l=<optimized out>,
s=<optimized out>, si=<optimized out>)
at ../../../../kern/kern_softint.c:589
#13 softint_dispatch (pinned=<optimized out>, s=4) at
../../../../kern/kern_softint.c:871
#14 0xffffffff8011402f in Xsoftintr ()

if (off + len >= MINCLSIZE) {
n = m_getcl(how, m->m_type, 0);
} else {
n = m_get(how, m->m_type);
}
if (n == NULL) {
goto out;
}

That should be 'goto enobufs;' I think. But even worse, the debug code
does not check for error. I will fix the second while I wait for confirmation
of the first :-)

christos


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