happend already in 10.0-i386, its still broken.

arambola:~ # ps fax | grep -m1 -wA 5 2242 ; lsmod
 2242 ?        Ss     0:00 /bin/bash /etc/init.d/rc 5
 2263 ?        S      0:00  \_ startpar -p4 -t 30 -T 3 -M start -P N -R 5
 4710 ?        Ss     0:00      \_ startpar -f -- xdm
 4817 ?        S      0:00      \_ /bin/sh /etc/init.d/SuSEfirewall2_setup start
 4823 ?        S      0:00          \_ /bin/bash /sbin/SuSEfirewall2 -q start
 4940 ?        S      0:00              \_ /usr/sbin/iptables -A reject_func -p tcp -j REJECT --reject-with tcp-reset
Module                  Size  Used by
carambola:~ # 

SuSEfirewall2 S 000000000fe14de4 11280  4823   4817  4940               (NOTLB)
Call Trace:
[C000000074FF7940] [000000007BAA6196] 0x7baa6196 (unreliable)
[C000000074FF7B10] [C00000000000E70C] .__switch_to+0x100/0x120
[C000000074FF7BA0] [C000000000470F6C] .schedule+0x62c/0x778
[C000000074FF7C80] [C00000000005AE44] .do_wait+0xc44/0xde8
[C000000074FF7DC0] [C0000000000127A4] .compat_sys_waitpid+0x18/0x2c
[C000000074FF7E30] [C0000000000086F8] syscall_exit+0x0/0x40
iptables      S 000004000017b79c 11664  4940   4823                     (NOTLB)
Call Trace:
[C000000076CF37C0] [C000000076CF3880] 0xc000000076cf3880 (unreliable)
[C000000076CF3990] [C00000000000E70C] .__switch_to+0x100/0x120
[C000000076CF3A20] [C000000000470F6C] .schedule+0x62c/0x778
[C000000076CF3B00] [C00000000024FD60] .write_chan+0x3dc/0x464
[C000000076CF3C10] [C00000000024B93C] .tty_write+0x1e4/0x2e0
[C000000076CF3CF0] [C0000000000AEF0C] .vfs_write+0xd0/0x1b0
[C000000076CF3D90] [C0000000000AF624] .sys_write+0x4c/0x8c
[C000000076CF3E30] [C0000000000086F8] syscall_exit+0x0/0x40

arambola:~ #  strace -fp 4940
Process 4940 attached - interrupt to quit
write(2, "les table `filter\': iptables who"..., 58

I can kill -11 4940, then the parent will hang. 
if I kill -9 it, its parent will hang too, until I kill -9 it as well.

makes kernel testing in default config nearly impossible.