Bug 510894
| Summary: | ptrace(GETSIGINFO) not working as expected (utrace) | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Shachar Shemesh <shachar> | ||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | 10 | CC: | fche, itamar, kernel-maint | ||||
| Target Milestone: | --- | Keywords: | Triaged | ||||
| Target Release: | --- | ||||||
| Hardware: | i686 | ||||||
| OS: | Linux | ||||||
| URL: | http://fakerootng.svn.sourceforge.net/viewvc/fakerootng/trunk/tests/getsiginfo.c?revision=300 | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2009-12-18 09:37:37 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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This is fixed in Fedora 11's 2.6.29 kernel. This message is a reminder that Fedora 10 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 10. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '10'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 10's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 10 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed. |
Created attachment 351372 [details] Sample code displaying the problem Description of problem: the ptrace(PTRACE_GETSIGINFO) is not returning the expected values in si_code, instead returning different values in some cases, and EINVAL in others. Version-Release number of selected component (if applicable): $ uname -a Linux vmf10 2.6.27.24-170.2.68.fc10.i686 #1 SMP Wed May 20 23:10:16 EDT 2009 i686 i686 i386 GNU/Linux How reproducible: Always Steps to Reproduce: 1. Compile attached test program, or download from URL above 2. Run on vanilla kernel 3. Run on Fedora kernel Actual results: Process 2256 stopped with SIGSTOP Process 2256 stopped with SIGTRAP siginfo.si_code=1 Process 2256 stopped with SIGTRAP ptrace(GETSIGINFO failed): Invalid argument Process 2256 stopped with SIGTRAP ptrace(GETSIGINFO failed): Invalid argument Process 2256 stopped with SIGTRAP siginfo.si_code=0 Process 2256 stopped with SIGTRAP ptrace(GETSIGINFO failed): Invalid argument Process 2256 stopped with SIGTRAP ptrace(GETSIGINFO failed): Invalid argument Process 2256 stopped with SIGTRAP siginfo.si_code=0 Process 2256 stopped with SIGTRAP ptrace(GETSIGINFO failed): Invalid argument ... Process 2256 stopped with SIGTRAP ptrace(GETSIGINFO failed): Invalid argument Process 2256 stopped with SIGCHLD Process 2256 stopped with SIGTRAP siginfo.si_code=1 Process 2256 stopped with SIGTRAP ptrace(GETSIGINFO failed): Invalid argument Process 2256 exit with exit code 3 Expected results: Taken on vanilla 2.6.30 for AMD64: Process 20285 stopped with SIGSTOP Process 20285 stopped with SIGTRAP siginfo.si_code=2 Process 20285 stopped with SIGTRAP siginfo.si_code=5 Process 20285 stopped with SIGTRAP siginfo.si_code=5 Process 20285 stopped with SIGTRAP siginfo.si_code=0 Process 20285 stopped with SIGTRAP siginfo.si_code=5 Process 20285 stopped with SIGTRAP siginfo.si_code=5 Process 20285 stopped with SIGTRAP siginfo.si_code=0 Process 20285 stopped with SIGTRAP siginfo.si_code=5 .... Process 20285 stopped with SIGTRAP siginfo.si_code=5 Process 20285 stopped with SIGCHLD Process 20285 stopped with SIGTRAP siginfo.si_code=2 Process 20285 stopped with SIGTRAP siginfo.si_code=5 Process 20285 exit with exit code 3 Additional info: I have not investigated why a single step returns 1 on Fedora and 2 on vanilla. This may well be the difference between the architectures (i686 vs. amd64). If it is, then not a problem. If it's not, then this is a bug. Either way, GETSIGINFO should not return an error (EINVAL) merely because its internal state is not correct, certainly not in cases where vanilla actually reports a distinct code (after PTRACE_SYSCALL).