| Summary: | [abrt] kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000060 rtl92ce_get_desc() | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Akshay Dua <dakshay> |
| Component: | kernel | Assignee: | John W. Linville <linville> |
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 16 | CC: | conflatulence, fabian.deutsch, frigoris.ma, gansalmon, itamar, jonathan, kernel-maint, larry.finger, madhu.chinakonda |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:e56ddb3065f692089a23d0cf8f754d99dc263d16 | ||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-09-04 17:10:11 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Attachments: | |||
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Description
Akshay Dua
2012-02-14 05:46:35 UTC
Does this happen whenever you rmmod the rtlwifi driver? I wonder why it is getting an RX interrupt long after the call to the module exit. Some queue is not being cleared. I'll take a look at this. Could you please state exactly what sequence of actions led to this oops? Created attachment 563808 [details]
Test patch to disable interrupts
Does this patch fix the problem?
This problem is believed to have something to do with the RealTek RTL8192CE WiFi adapter. I'm using hostapd to create a 802.11n access point on my laptop, and the radio link sometimes dies spotaneously, and this kernel trace can be seen in dmesg output. Package: kernel OS Release: Fedora release 16 (Verne) Oops, comment #4 was auto-generated by abrt, and the text was what I typed into the abrt reporting tool without looking at the context of the thread. Sorry for causing the confusion. Reply to comment #2: on my computer this usually happen some 20 or 30 seconds after hostapd is started and a 802.11n access point is created. After that, each time you restart hostapd the WiFi card lasts some 20 seconds and dies. It cannot be re-created reliably, and I'm trying to see if creating a pure 802.11g AP could lower the chance of bumping into this bug. Sorry for spamming this thread, but I think I completely got things mixed up. You can safely ignore my comment #4 and #5. The WiFi signal issue seems not directly related to this bug and I'll open another report for it. Is this bug a dup: https://bugzilla.redhat.com/show_bug.cgi?id=797762 ? At least it seems to be the same function called. This happens to me when rmmod the module and I hope that this might be the reason why my laptop doesn't resume. [mass update] kernel-3.3.0-4.fc16 has been pushed to the Fedora 16 stable repository. Please retest with this update. [mass update] kernel-3.3.0-4.fc16 has been pushed to the Fedora 16 stable repository. Please retest with this update. [mass update] kernel-3.3.0-4.fc16 has been pushed to the Fedora 16 stable repository. Please retest with this update. Created attachment 592111 [details]
dmesg with oops when rmmod rtl8192ce, debug param of rtl8192ce is 4
Hi this oops happens for me on fedora 17 x64 lenovo e320 laptop with rtl8188ce. It happens on fedora 3.4.0-1 and vanilla 3.4.2. The dmesg for 3.4.2 with debug of 4 is attached in previous comment. Also will add debug 5 but dmesg buffer wraps so the early messages are lost. * the rtl8192ce has trouble connecting to my router at home when I'm in a different room to the router. A rt73 usb dongle has no problem connecting from the same place. I try to rmmod rtl8192ce to stop network manager popping up the reconnect box at inopportune moments. Created attachment 592113 [details]
dmesg of 3.4.2 kernel with oops when rmmod rtl8192ce, debug param of rtl8192ce is 5
"sudo modprobe -r rtl8192ce" in the process of trying to reload my wireless module, immediate crash of some sort dropping me into a fullscreen terminal with my X cursor. Was able to switch to another virtual terminal and back, X was as I left it. Automatic bug reporter was waiting for me to report this. Package: kernel OS Release: Fedora release 16 (Verne) Where is the oops report? Bug has been sitting in needinfo for over 2 months. Closing. |