Enabling IPSec panics stable/9 (runs OK on stable/8)

[VANHULLEBUS Yvan]

On Wed, Jan 04, 2012 at 01:46:03PM +0100, Attila Nagy wrote:
>    Hi,

Hi.


>    I've just upgraded a 8-STABLE box to 9-STABLE (well, just few commits
>    before it has been tagged as STABLE), which runs from NFS (pxebooted).
>    It has some IPSec config in ipsec.conf, like this for several boxes:
>    add 172.28.16.4 172.16.248.2 ah 15704 -A hmac-md5 "asdfgh";
>    add 172.16.248.2 172.28.16.4 ah 24504 -A hmac-md5 "asdfgh";
>    add 172.28.16.4 172.16.248.2 esp 15705 -E blowfish-cbc "hgfdsa";
>    add 172.16.248.2 172.28.16.4 esp 24505 -E blowfish-cbc "hgfdsa";
>    spdadd 172.28.16.4 172.16.248.2 any -P out ipsec
>               esp/transport/172.28.16.4-172.16.248.2/default
>               ah/transport/172.28.16.4-172.16.248.2/default;

There is probably nothing related to the crash, but do you really use
static IPsec without IKE keying ????


[....]
>    kgdb says:
>    (kgdb) bt
>    #0  doadump (textdump=1) at /data/usr/src/sys/kern/kern_shutdown.c:260
>    #1  0xffffffff80845705 in kern_reboot (howto=260)
>        at /data/usr/src/sys/kern/kern_shutdown.c:442
>    #2  0xffffffff80845bb1 in panic (fmt=Variable "fmt" is not available.
>    )
>        at /data/usr/src/sys/kern/kern_shutdown.c:607
>    #3  0xffffffff80b167a0 in trap_fatal (frame=0xc, eva=Variable "eva" is
>    not available.
>    )
>        at /data/usr/src/sys/amd64/amd64/trap.c:819
>    #4  0xffffffff80b16ae9 in trap_pfault (frame=0xffffff80002cd2a0,
>    usermode=0)
>        at /data/usr/src/sys/amd64/amd64/trap.c:735
>    #5  0xffffffff80b16faf in trap (frame=0xffffff80002cd2a0)
>        at /data/usr/src/sys/amd64/amd64/trap.c:474
>    #6  0xffffffff80b012ef in calltrap ()
>        at /data/usr/src/sys/amd64/amd64/exception.S:228
>    #7  0xffffffff809bf779 in ipsec_process_done (m=0xfffffe000c7c7a00,
>        isr=0xfffffe001bf54380) at
>    /data/usr/src/sys/netipsec/ipsec_output.c:170

Here seems to be the problem....
Can you do the following (in this order) in kgdb:
frame 7
p saidx
p *saidx

The latest will probably generate an error, as (if you have the exact
same ipsec_output.c as I have from HEAD) saidx will probably have an
invalid adress.


[...]
>    8-STABLE runs fine with the same config.

Strange.... I'll review changes in IPsec stack which have been done in
STABLE/9 and not backported to STABLE/8.....


Yvan.