Hi Anatoly.
On Tue, Jan 02, 2018 at 12:11:49AM +0300, Anatoly Pugachev wrote:
> Hello!
>
> Using latest git kernel (4.15.0-rc6) , getting the following messages
> on LDOM/kernel boot:
>
> [ 7.693653] Kernel unaligned access at TPC[7496d8] aa_dfa_unpack+0x38/0x580
> [ 7.693735] Kernel unaligned access at TPC[7496f8] aa_dfa_unpack+0x58/0x580
> [ 7.693782] Kernel unaligned access at TPC[749708] aa_dfa_unpack+0x68/0x580
> [ 7.693829] Kernel unaligned access at TPC[74973c] aa_dfa_unpack+0x9c/0x580
> [ 7.693875] Kernel unaligned access at TPC[749758] aa_dfa_unpack+0xb8/0x580
> [ 7.697135] audit: type=1400 audit(1514840016.480:2):
> apparmor="STATUS" operation="profile_load" profile="unconfined"
> name="/usr/sbin/tcpdump" pid=507 comm="apparmor_parser"
>
>
> Can someone please look, what could cause unaligned access at this
> aa_dfa_unpack function/structure ?
A quick guess would be that you are using nulldfa.
And this variable may not be aligned.
Try to check the address of nulldfa_src.
You could also try to force the compiler to align the data
to 8 byte like this (security/apparmor/match.c):
static char nulldfa_src[] = {
#include "nulldfa.in"
} __aligned(8); <= see the added __aligned(8)
This is just from a quick look at things, but please try it to
see if this is the problematic spot.
Sam
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