Date: Wed, 05 Oct 2022 21:15:26 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 266730] powerpc kernel crash on loadable modules that use copyin/copyout ifunc Message-ID: <bug-266730-227-1Vj8LBsjDl@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-266730-227@https.bugs.freebsd.org/bugzilla/> References: <bug-266730-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D266730 --- Comment #3 from commit-hook@FreeBSD.org --- A commit in branch stable/13 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=3D05f9810b31973fb0d5f07a6eb9a12a22f= 81c38ad commit 05f9810b31973fb0d5f07a6eb9a12a22f81c38ad Author: Alfredo Dal'Ava Junior <alfredo@FreeBSD.org> AuthorDate: 2022-10-03 14:51:05 +0000 Commit: Alfredo Dal'Ava Junior <alfredo@FreeBSD.org> CommitDate: 2022-10-06 00:14:19 +0000 powerpc: cpuset: add local functions for copyin/copyout Add local functions to workaround an instruction segment trap (panic) when the indirect functions copyin and copyout are called by an external loadable kernel module (i.e. pfsync, zfs and linuxulator). The crash was triggered by change 47a57144af25a7bd768b29272d50a36fdf2874ba, but kernel binary linked with LLD 9 works fine. LLVM bisect points that LLD behavior chaged after dc06b0bc9ad055d06535462d91bfc2a744b2f589. This is know to affect powerpc targets only and the final fix is still being discussed with the LLVM community. PR: 266730 Reviewed by: luporl, jhibbits (on IRC, previous version) MFC after: 2 days Sponsored by: Instituto de Pesquisas Eldorado (eldorado.org.br) Differential Revision: https://reviews.freebsd.org/D36234 (cherry picked from commit db79bf75ac9eb1b5678ccbaebb45fb88c0e0e1e3) sys/kern/kern_cpuset.c | 36 ++++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) --=20 You are receiving this mail because: You are the assignee for the bug.=
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