Bug 720176
| Summary: | Segmentation fault in dynamic loader on AVX enabled CPU | ||||||
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| Product: | [Fedora] Fedora | Reporter: | MK <mk> | ||||
| Component: | glibc | Assignee: | Andreas Schwab <schwab> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | urgent | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 14 | CC: | fweimer, jakub, schwab | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | glibc-2.14.90-8 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | |||||||
| : | 790399 (view as bug list) | Environment: | |||||
| Last Closed: | 2011-09-13 06:12:04 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Description
MK
2011-07-10 16:01:38 UTC
(In reply to comment #0) > Seems to also affect F13's glibc 2.13. I have attached the "small reproducer" > which was attached to the other bug report, as it does reproduce the issue. Sorry, that should read "F14", not "F13". Created attachment 512095 [details]
test case for SIGILL
(In reply to comment #0) > 2) Compile and run attachment glibc_avx.zip. Sorry, the .zip referred to did not attach with the first message. The attachment labelled "test case for SIGILL" is a tar.gz containing the same code. Please provide /proc/cpuinfo. (In reply to comment #4) > Please provide /proc/cpuinfo. This is the first of four identical cores: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Xeon(R) CPU E31230 @ 3.20GHz stepping : 7 cpu MHz : 3192.925 cache size : 8192 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 4 apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse s se2 ss ht tm syscall nx rdtscp lm constant_tsc ida nonstop_tsc arat pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr ss e4_1 sse4_2 popcnt lahf_lm bogomips : 6385.85 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: [8] It doesn't look like the cpu supports AVX. Okay, although the E31230 is listed here: http://en.wikipedia.org/wiki/Sandy_Bridge#Server_processors http://en.wikipedia.org/wiki/Advanced_Vector_Extensions#CPUs_with_AVX As supporting AVX. But I have no further confirmation of that. The provider definitely seems to believe the new hardware uses "Sandy Bridge", etc. Anyway, presuming that it actually does *not* support AVX, or that the kernel does not consider it so, what could cause this problem? This is on an openVZ slice, so I did not/cannot compile the kernel (2.6.32 built with gcc 4.1.2). Your patience is appreciated, and please excuse my ignorance here. This does not look like my mistake. Is there something else that could produce the identical backtrace and cause that "Hello World" test to receive a SIGILL? What is "openVZ slice"? (In reply to comment #8) > What is "openVZ slice"? OpenVZ is akin to Xen; it's a method for "container-based virtualization". Ie, the system in question is a VPS (virtual private server) "slice". I have never used the openVZ software myself, but I do work on small remote servers that depend on it or Xen. http://wiki.openvz.org/Main_Page Since the kernel used may be a factor, I'll get on the openVZ mail list and see if anyone has any thoughts about possible causes, and perhaps the kernel devel list too. glibc-2.14.90-5 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/glibc-2.14.90-5 Package glibc-2.14.90-5: * should fix your issue, * was pushed to the Fedora 16 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing glibc-2.14.90-5' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/glibc-2.14.90-5 then log in and leave karma (feedback). glibc-2.14.90-6 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/glibc-2.14.90-6 I upgraded to this glibc-2.14.90.5 on the avx hardware under openVZ, fedora 14, and the test case succeeded. After recompiling apache + perl + mod_perl the original issue was also resolved. Thanks much. glibc-2.14.90-7 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/glibc-2.14.90-7 glibc-2.14.90-8 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report. |