re: port-macppc/58283: NetBSD/macppc 10.0 reproducible kernel PGM trap panic

[matthew green <mrg%eterna23.net@localhost>]

The following reply was made to PR port-macppc/58283; it has been noted by GNATS.

From: matthew green <mrg%eterna23.net@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: port-macppc-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: re: port-macppc/58283: NetBSD/macppc 10.0 reproducible kernel PGM trap panic
Date: Tue, 11 Jun 2024 03:19:13 +1000

 >  0x12cbc8 is 'dssall' in vec_state_release:
 
 i think the bug here is that vec_restore_from_mcontext() is missing
 this check that is in vec_save_to_mcontext():
 
 	/* Save AltiVec context, if any. */
 	if (!vec_used_p(l))
 		return false;
 
 can you try adding this near the top of vec_restore_from_mcontext()?
 (with just return; void function.)
 
 
 .mrg.