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Mon, 09 Mar 2026 23:15:57 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 629NFvP2012296 for ; Mon, 9 Mar 2026 23:15:57 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 629NFvSD012295 for bugs@FreeBSD.org; Mon, 9 Mar 2026 23:15:57 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293701] GENERIC-KASAN fails to boot, #GP exception Date: Mon, 09 Mar 2026 23:15:57 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 16.0-CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: kris@tranception.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform bug_file_loc op_sys bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D293701 Bug ID: 293701 Summary: GENERIC-KASAN fails to boot, #GP exception Product: Base System Version: 16.0-CURRENT Hardware: amd64 URL: https://github.com/freebsd/freebsd-src/pull/2069 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: kris@tranception.com Created attachment 268665 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D268665&action= =3Dedit Screenshot of #GP exception raised by kernel during boot 16.0-RELEASE / GENERIC-KASAN kernel failed to boot on a Dell PowerEdge C6615 with an AMD EPYC 8224P CPU; UEFI BIOS caught a #GP exception (see attached screenshot). %RIP address from UEFI register dump pointed to kasan_memset() where %GS relative pointer (curthread->td_pflags2) was dereferenced. Investigation identified memset() call in wrmsr_early_safe_end() as culprit, replacing call to memset() with direct assignment as per patch in github pu= ll request (see URL field in this bug report) resulted in a bootable GENERIC-K= ASAN kernel. --=20 You are receiving this mail because: You are the assignee for the bug.=