Bug 218239
| Summary: | Kernel oops in iwlwifi 6.6.3 with AX210 while scanning (looks like firmware bug) | ||
|---|---|---|---|
| Product: | Networking | Reporter: | Paul Grandperrin (paul.grandperrin) |
| Component: | Wireless | Assignee: | networking_wireless (networking_wireless) |
| Status: | NEW --- | ||
| Severity: | normal | CC: | entaahlaah, paul.grandperrin |
| Priority: | P3 | ||
| Hardware: | Intel | ||
| OS: | Linux | ||
| Kernel Version: | 6.6.3 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: |
ioports
ver_linux cpu_info lspci modules iomem dmesg dmesg2 trace-cmd record -e iwlwifi -e mac80211 -e cfg80211 -e iwlwifi_msg |
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Created attachment 305559 [details]
ver_linux
Created attachment 305560 [details]
cpu_info
Created attachment 305561 [details]
lspci
Created attachment 305562 [details]
modules
Created attachment 305563 [details]
iomem
Created attachment 305564 [details]
dmesg
Created attachment 305565 [details]
dmesg2
I've just been told about the commands to collect more information about wireless bugs at https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/debugging but unfortunately, I rebooted my computer and the issue disappeared. I think I might be able to trigger it again so I'll do that when it happens. The bug happened again, and I really don't know why, I really did nothing in particular. I'll collect more info now. Created attachment 305566 [details]
trace-cmd record -e iwlwifi -e mac80211 -e cfg80211 -e iwlwifi_msg
I've been able to use trace-cmd but I can't extract debug information about the firmware. My kernel has the correct config: zcat /proc/config.gz |rg -i CONFIG_ALLOW_DEV_COREDUMP CONFIG_ALLOW_DEV_COREDUMP=y But the folder /sys/kernel/debug/iwlwifi doesn't exist. And finally, I started the process to do sniffing but since the issue happens when the device is scanning, I have no idea which channel is responsible. There's quite a few AP around me on 2.4GHz and 5GHz so I can't just sniff a few selected channels. |
Created attachment 305558 [details] ioports Hi! My system was running fine, no errors in the logs, and then it started to happen, an infinite flow of oops in the kernel logs. The bug seems to happen in "__ieee80211_scan_completed" and it seems to involve the firmware: "Microcode SW error detected. Restarting", "ieee80211 phy0: Hardware restart was requested" and "iwlwifi 0000:02:00.0: FW error in SYNC CMD SCAN_REQ_UMAC". Since then, the iwlwifi module oops all the time, even after unloading and reloading it. My system: NixOS 23.11 Linux 6.6.3 Intel(R) Wi-Fi 6 AX210 160MHz, REV=0x420 firmware version: 83.e8f84e98.0 ty-a0-gf-a0-83.ucode Here's the logs attached and more info about my system. I tried very hard to get decode_stacktrace.sh to works with module symbols but the NixOS file hierarchy makes things quite difficult. I can try again if needed. Sincerly, Paul Grandperrin