Date: Wed, 12 Nov 2014 22:17:35 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 194974] New: Limit /dev/mem access to addresses in phys_avail[] - i.e. actual memory Message-ID: <bug-194974-8@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194974 Bug ID: 194974 Summary: Limit /dev/mem access to addresses in phys_avail[] - i.e. actual memory Product: Base System Version: 11.0-CURRENT Hardware: Any OS: Any Status: Needs Triage Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: emaste@freebsd.org Running a mismatched lsof on my ~10.1 desktop resulted in an MCA report and hard hang: MCA: Bank 1, Status 0xbf80000000200001 MCA: Global Cap 0x0000000000000c09, Status 0x0000000000000005 MCA: Vendor "GenuineIntel", ID 0x306a9, APIC ID 2 MCA: CPU 2 UNCOR PCC unclassified error MCA: Address 0xfee00080 MCA: Misc 0x86 MCA: Bank 1, Status 0xbf80000000200001 MCA: Global Cap 0x0000000000000c09, Status 0x0000000000000005 MCA: Vendor "GenuineIntel", ID 0x306a9, APIC ID 3 MCA: CPU 3 UNCOR PCC unclassified error MCA: Address 0xfee00080 MCA: Misc 0x86 Discussed with jhb@, presumably this happens after access to some device register. We should by default limit /dev/mem access to addresses in phys_avail[], but include a sysctl to enable such access for expert debugging. -- You are receiving this mail because: You are the assignee for the bug.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-194974-8>