Re: toolchain/55043: pkgsrc/security/sudo reliably crashes on mips

[Jason Thorpe <thorpej%me.com@localhost>]

The following reply was made to PR toolchain/55043; it has been noted by GNATS.

From: Jason Thorpe <thorpej%me.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: toolchain-manager%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost
Subject: Re: toolchain/55043: pkgsrc/security/sudo reliably crashes on mips
Date: Tue, 3 Mar 2020 08:05:51 -0800

 > On Mar 2, 2020, at 10:05 PM, Rin Okuyama <rokuyama.rk%gmail.com@localhost> =
 wrote:
 >=20
 > The following reply was made to PR toolchain/55043; it has been noted =
 by GNATS.
 >=20
 > From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
 > To: gnats-bugs%netbsd.org@localhost, Jason Thorpe <thorpej%me.com@localhost>
 > Cc:=20
 > Subject: Re: toolchain/55043: pkgsrc/security/sudo reliably crashes on =
 mips
 > Date: Tue, 3 Mar 2020 15:00:10 +0900
 >=20
 > Seems like GNU_RELRO v.s. 8KB-page problem observed on mips64:
 
 Hm, more info:
 
 [ 93016.520396] trap: pid 21349(visudo): sig 11: cause=3D0x80000004 =
 epc=3D0x7dea4db0 va=3D0x7deb9421
 
 That cause maps to T_TLB_MOD, and the VA of 0x7deb9421 would indicate =
 that it is in fact the "sb" instruction that's faulting, so you may be =
 right and that it's a RELRO botch (downgrading pages to RO that =
 shouldn't be).
 
 -- thorpej