Bug 229112
| Summary: | Kernel oops when tracing multiple processes using ptrace | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Magnus Vesterlund <magnus_vesterlund> | ||||||||||||||||
| Component: | kernel | Assignee: | Roland McGrath <roland> | ||||||||||||||||
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> | ||||||||||||||||
| Severity: | medium | Docs Contact: | |||||||||||||||||
| Priority: | medium | ||||||||||||||||||
| Version: | 6 | CC: | cebbert, davej, wtogami | ||||||||||||||||
| Target Milestone: | --- | ||||||||||||||||||
| Target Release: | --- | ||||||||||||||||||
| Hardware: | All | ||||||||||||||||||
| OS: | Linux | ||||||||||||||||||
| Whiteboard: | |||||||||||||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||||||||||||
| Doc Text: | Story Points: | --- | |||||||||||||||||
| Clone Of: | Environment: | ||||||||||||||||||
| Last Closed: | 2007-06-25 15:43:04 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: | |||||||||||||||||||
| Bug Depends On: | |||||||||||||||||||
| Bug Blocks: | 232676 | ||||||||||||||||||
| Attachments: |
|
||||||||||||||||||
|
Description
Magnus Vesterlund
2007-02-17 09:32:51 UTC
Created attachment 148265 [details]
Test case
Please post the oops messages. I am getting a couple of different oops messages. They also differ slightly between tracing a 64-bit process and a 32-bit process. Attaching a few samples. Created attachment 148287 [details]
Oops message, tracing 64-bit process.
Created attachment 148288 [details]
Oops message, tracing 64-bit process.
Created attachment 148289 [details]
Oops message, tracing 32-bit process.
Major ptrace/utrace update is in 2.6.20-1.2933.fc6. Please test. It still oopses and locks up the machine, but with a different oops message. Created attachment 150537 [details]
Oops message from 2.6.20-1.2933.fc6
Test kernels (version 1.2937) for this issue are at: http://people.redhat.com/cebbert Please test and report back. This kernel also oopses, but not immediately when I press ctrl-c like it the earlier kernels. The oops usually comes a few seconds later. I get more varied oops messages, but they usually have this call trace: Call Trace: <IRQ> [<ffffffff80295c95>] __rcu_process_callbacks+0x12d/0x1bc [<ffffffff80295d47>] rcu_process_callbacks+0x23/0x43 [<ffffffff8028c3fc>] tasklet_action+0x53/0x9d [<ffffffff8025b23c>] call_softirq+0x1c/0x28 [<ffffffff80211fc0>] __do_softirq+0x55/0xc3 [<ffffffff8025b23c>] call_softirq+0x1c/0x28 <EOI> [<ffffffff8028c2ea>] ksoftirqd+0x0/0xbf [<ffffffff802684d2>] do_softirq+0x2c/0x85 [<ffffffff8028c349>] ksoftirqd+0x5f/0xbf [<ffffffff80231852>] kthread+0xd0/0xff [<ffffffff8025aec8>] child_rip+0xa/0x12 [<ffffffff80231782>] kthread+0x0/0xff [<ffffffff8025aebe>] child_rip+0x0/0x12 Just tell me if you want a few complete oops messages. Yes, we need the full oops messages. Created attachment 150956 [details]
Five oops messages in .tar.gz.
Created attachment 150959 [details]
five oops messages as plain text
Magnus, kernel 2962 has a new utrace update. Can you test it? The problem seems to be fixed in 2962, I can not reproduce the oops. I also tried kernel-2.6.21-1.3228.fc7.x86_64, but I can still reproduce the oops with that kernel. I just applied the same fixes to the F7 kernel, so it should be OK in the next release. |