Bug 607261
| Summary: | Read from /proc/xen/xenbus does not honor O_NONBLOCK | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 4 | Reporter: | Paolo Bonzini <pbonzini> |
| Component: | kernel-xen | Assignee: | Paolo Bonzini <pbonzini> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | 4.9 | CC: | clalance, drjones, mjenner, qcai, xen-maint, yuzhang |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | 470801 | Environment: | |
| Last Closed: | 2011-02-16 16:06:07 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: | |||
| Bug Depends On: | 470801 | ||
| Bug Blocks: | 458302 | ||
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. Committed in 89.42.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/ QA verified this bug with kernel-xenU-2.6.9-93.EL: Compile the reproducer in the guest and execute it. output is 'works'. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2011-0263.html |
reproducer: #include <stdlib.h> #include <errno.h> #include <fcntl.h> #include <unistd.h> int main() { char buf[256]; int fd = open ("/proc/xen/xenbus", O_RDONLY | O_NONBLOCK); if (fd == -1) { perror ("/proc/xen/xenbus"); exit (1); } alarm (5); while (read (fd, buf, 256) == -1 && errno != EAGAIN) ; puts ("works"); exit (0); }