OS-4119

Panic in us-east3b while running:
/native/usr/sbin/chroot /native /usr/bin/arcstat

debugging crash dump vmcore.4 (64-bit) from 5DCS842
operating system: 5.11 joyent_20150326T192000Z (i86pc)
image uuid: (not set)
panic message: assertion failed: lwpd->br_ntv_stack != 0, file: ../../common/brand/lx/os/lx_brand.c, line: 444
dump content: kernel pages only
>
> ::stack
vpanic()
0xfffffffffba6f318()
lx_lwp_set_native_stack_current+0x41(fffff044188b1380, 80477a8)
lx_restorecontext+0xc0(fffff001f7cd4910)
restorecontext+0x53(fffff001f7cd4910)
getsetcontext32+0x27b(1, 8047300)
_sys_sysenter_post_swapgs+0x153()
>

I was able to replicate it later by simply running /native/usr/perl5/bin/perl.
It appears that the brand structures are not being stripped off the process when it's executed in EBA_NATIVE mode.

Collected from a running native perl in that manner:

> 0t3062::pid2proc | ::print proc_t __p_brand_data
__p_brand_data = {
    __p_brand_data.__brand_data = 0xffffff014a6fa510
    __p_brand_data.__exit_data = 0x4a6fa510
}
> 0t3062::pid2proc | ::print proc_t p_tlist->t_lwp->lwp_brand
p_tlist->t_lwp->lwp_brand = 0xffffff0150881e00

Former user commented on 2015-04-03T13:23:39.000-0400 (edited 2015-04-03T13:27:33.000-0400):

@Former user describes this as a priority, as like many types of native fixes, the risk is higher and we're quickly marching towards a "GA" of lx-brand.

Former user commented on 2015-04-08T01:50:54.000-0400:

Jira Bot commented on 2021-01-03T09:14:13.208-0500: