freebsd stable - Jul 2012 - kernel panic caused by zfs/sa.c

Hello,

I'm experiencing a kernel panic that appears to be caused by zfs.

No errors are making it into /var/log/messages, but here is the error
message that appears on my screen after panic (transcribed):

panic solaris assert BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC,
file:
/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/sa.c, line
1262

I can reproduce this by running "cd /usr/ports/www/webkit-ghtk2; make
clean"

I looked at line 1262 in sa.c and it's part of a bit of code that checks
if byte swapping is necessary. The code starting at line 1260:


if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic != SA_MAGIC
&&
            sa_hdr_phys->sa_magic != 0) {
	                VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC);
	                sa_byteswap(hdl, buftype);
	        }

As far as I can tell, my source is up to date and this code is the same
as what is in 9-STABLE. 

I'm not sure what's causing the panic, does anyone have a suggestion?

Thanks for the help.

--Greg

2012/7/19 Greg Bonett <greg@bonett.org>:
> Hello,
>
> I'm experiencing a kernel panic that appears to be caused by zfs.
>
> No errors are making it into /var/log/messages, but here is the error
> message that appears on my screen after panic (transcribed):
>
> panic solaris assert BSWAP_32(sa_hdr_phys->sa_magic) == SA_MAGIC,
> file:
/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/sa.c, line
1262
>
> I can reproduce this by running "cd /usr/ports/www/webkit-ghtk2; make
> clean"
If that's some sort of filesystem corruption, and you use portsnap, do
you still have a panic after "portsnap extract www/webkit-gtk2 &&
cd
/usr/ports/www/webkit-gtk2 && make clean" ?
> I looked at line 1262 in sa.c and it's part of a bit of code that
checks
> if byte swapping is necessary. The code starting at line 1260:
>
>
> if (IS_SA_BONUSTYPE(bonustype) && sa_hdr_phys->sa_magic !=
SA_MAGIC &&
>             sa_hdr_phys->sa_magic != 0) {
>                         VERIFY(BSWAP_32(sa_hdr_phys->sa_magic) ==
SA_MAGIC);
>                         sa_byteswap(hdl, buftype);
>                 }
>
> As far as I can tell, my source is up to date and this code is the same
> as what is in 9-STABLE.
>
> I'm not sure what's causing the panic, does anyone have a
suggestion?
>
> Thanks for the help.
>
> --Greg
>
>
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