Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-10-04 Thread Aurelien Jarno
Hi, On 2022-10-04 08:51, Aurelien Jarno wrote: > Hi > > On 2022-09-25 13:43, Aurelien Jarno wrote: > > > Running a quick diff against old procinfo reveals that "flags" has the > > > following new entries now: > > > > > > tsc_deadline_timer ssbd ibrs ibpb stibp bmi1 bmi2 md_clear flush_l1d > > >

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-10-04 Thread Aurelien Jarno
Hi, On 2022-10-04 19:44, debian-bug-rep...@p0358.net wrote: > > Is there an easy way to unbrick a system affected by the issue? such as > > a kernel-line option or a configuration file in /etc? I don't see how I > > can set a GLIBC_TUNABLES environment variable for the whole system. > > I was try

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-10-04 Thread Samuel Thibault
Hello, Is there an easy way to unbrick a system affected by the issue? such as a kernel-line option or a configuration file in /etc? I don't see how I can set a GLIBC_TUNABLES environment variable for the whole system. Samuel

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-10-04 Thread debian-bug-report
Is there an easy way to unbrick a system affected by the issue? such as a kernel-line option or a configuration file in /etc? I don't see how I can set a GLIBC_TUNABLES environment variable for the whole system. I was trying during my testing to set such option globally somehow, but failed, tho

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-10-03 Thread Aurelien Jarno
Hi On 2022-09-25 13:43, Aurelien Jarno wrote: > > Running a quick diff against old procinfo reveals that "flags" has the > > following new entries now: > > > > tsc_deadline_timer ssbd ibrs ibpb stibp bmi1 bmi2 md_clear flush_l1d > > > > > it looks like that the BMI2 > > > instructions support ha

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-25 Thread Aurelien Jarno
On 2022-09-25 12:02, debian-bug-rep...@p0358.net wrote: > > Now that we understood the bug, I actually find strange that the > > microcode update is fixing this, it looks like that the BMI2 > > instructions support has been added in a microcode update. Would it be > > possible to give the output of

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-25 Thread debian-bug-report
Now that we understood the bug, I actually find strange that the microcode update is fixing this, it looks like that the BMI2 instructions support has been added in a microcode update. Would it be possible to give the output of /proc/cpuinfo with and without the microcode update applied? The /pr

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-25 Thread Aurelien Jarno
On 2022-09-25 00:35, debian-bug-rep...@p0358.net wrote: > Hello, sorry for delayed response, I've managed to collect and analyze a few > coredump files with valid symbols (I installed libc6-dbg and dpkg-dev, and > pointed gdb at Debian's debuginfod server, also used apt-get source to get > the sour

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-24 Thread debian-bug-report
I can confirm updating the microcode by installing the intel-microcode package and rebooting does indeed mitigate this issue. An LXC container that was previously bricked due to update now starts and seems to behave fully normally. [0.00] microcode: microcode updated early to revision

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-24 Thread debian-bug-report
Hello, sorry for delayed response, I've managed to collect and analyze a few coredump files with valid symbols (I installed libc6-dbg and dpkg-dev, and pointed gdb at Debian's debuginfod server, also used apt-get source to get the sources for libc6). It seems there are at least 3-4 distinct pl

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-23 Thread Stephen Kitt
Hi Aurelien, On Tue, Sep 20, 2022 at 11:20:26PM +0200, Aurelien Jarno wrote: > Have you been able to progress on that? Do you need some help for a > specific step? For what it’s worth, I’ve upgraded libc6 on my Haswell system (Xeon E3-1245v3) and everything seems to be working fine. Regards, St

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-20 Thread Aurelien Jarno
Hi, Have you been able to progress on that? Do you need some help for a specific step? Regards Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-15 Thread Aurelien Jarno
Hi, On 2022-09-15 20:59, debian-bug-rep...@p0358.net wrote: > > The first thing would be to provide the output of /proc/cpuinfo > > Pasting below (please **NOTE** that "avx2" would normally be there, but is > currently missing due to this kernel option `clearcpuid=293` with which I > booted the P

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-15 Thread debian-bug-report
> The first thing would be to provide the output of /proc/cpuinfo Pasting below (please **NOTE** that "avx2" would normally be there, but is currently missing due to this kernel option `clearcpuid=293` with which I booted the PC now -- I can **100%** confirm "avx2" was there before, but don't

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-15 Thread Aurelien Jarno
Hi, On 2022-09-15 01:37, debian-bug-rep...@p0358.net wrote: > Package: libc6 > Version: 2.31-13+deb11u4 > Severity: critical > > Dear Maintainer, > > After an upgrade to version +deb11u4 on my system running Haswell > (4th gen Intel Core) CPU, most of the programs including bash or dpkg > are im

Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

2022-09-14 Thread debian-bug-report
Package: libc6 Version: 2.31-13+deb11u4 Severity: critical Dear Maintainer, After an upgrade to version +deb11u4 on my system running Haswell (4th gen Intel Core) CPU, most of the programs including bash or dpkg are immediately crashing with SIGILL. The problem seems to be caused/ related to AVX