Date: Tue, 12 May 2020 04:11:20 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 246413] boot from 12.1 DVD iso as MBR causes panic zfree wild pointer Message-ID: <bug-246413-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246413 Bug ID: 246413 Summary: boot from 12.1 DVD iso as MBR causes panic zfree wild pointer Product: Base System Version: 12.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: jmillard@sprynet.com This is related to 242106. My W520 lenovo thinkpad tries MBR boot before UE= FI boot from DVD. Booting as MBR causes the panic. If I change the BIOS to try UEFI before MBR it works fine. The workaround for 242106 is to tell the VM = to boot UEFI first. The text of the panic is: CD Loader 1.2 Building the boot loader arguments Looking up /BOOT/LOADER... found Relocating the loader and BTX Starting the BTX loader BTX loader 1.00 BTX version is 1.02 Consoles: internal video/keyboard BIOS CD is cd0 BIOS drive C: is disk0 BIOS 630kb/3125884kb available memory FreeBSD/x86 bootstrap loader, Revision 1.1 panic: zfree(90xbd69c6b0,8224): wild pointer --> Press a key on the console to reboot <-- I reproduced this with disk and dvd ISO's The code should probably sanity check the startup environment. This is not = high priority as the work-around is easy. This bug will serve to document the problem and the work-around. --=20 You are receiving this mail because: You are the assignee for the bug.=
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