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Groups > linux.debian.kernel > #79028

Bug#1035939: linux-image-6.1.0-8-amd64: dmesg flood xhci_hcd 0000:03:00.0: WARN: bandwidth overrun event for slot 6 ep 4 on endpoint

Cross-posted to 2 groups.

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Package: linux-image-6.1.0-8-amd64
Severity: normal
X-Debbugs-Cc: claude@mathr.co.uk

Dear Maintainer,

   * What led up to the situation?

I noticed a flood of messages (1000 per second!) in dmesg (mirrored in /var/log)
after it filled my drive (16GB of logs total, over a couple of weeks).

The message was:

xhci_hcd 0000:03:00.0: WARN: bandwidth overrun event for slot 6 ep 4 on endpoint

or

xhci_hcd 0000:03:00.0: WARN: bandwidth overrun event for slot 11 ep 4 on endpoint

(it reoccurred after rebooting, but does not seem predictable).

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

I unplugged my USB soundcard from my USB hub, and the message flood stopped.

When plugging in the USB soundcard, dmesg reports similar to:

usb 1-12.1.3: new full-speed USB device number 12 using xhci_hcd
usb 1-12.1.3: New USB device found, idVendor=0582, idProduct=0074, bcdDevice= 1.07
usb 1-12.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-12.1.3: Product: EDIROL UA-25
usb 1-12.1.3: Manufacturer: Roland

   * What outcome did you expect instead?

I expect potentially rapidly repeated kernel messages to be rate-limited to a sensible amount.

I tried:

cd linux-6.1.25/drivers/usb/host
sed -i "s/xhci_warn/xhci_warn_ratelimited/g" xhci-ring.c
sed -i "s/xhci_warn_ratelimited_ratelimited/xhci_warn_ratelimited/g" xhci-ring.c

and rebuilt the kernel.

I have not yet rebooted to test if it fixes my problem.


Thanks for your work on this package,


Claude


-- System Information:
Debian Release: 12.0
  APT prefers testing-security
  APT policy: (990, 'testing-security'), (990, 'testing'), (500, 'testing-debug')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-8-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-6.1.0-8-amd64 depends on:
ii  initramfs-tools [linux-initramfs-tool]  0.142
ii  kmod                                    30+20221128-1
ii  linux-base                              4.9

Versions of packages linux-image-6.1.0-8-amd64 recommends:
ii  apparmor             3.0.8-3
ii  firmware-linux-free  20200122-1

Versions of packages linux-image-6.1.0-8-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  extlinux                3:6.04~git20190206.bf6db5b4+dfsg1-3+b1
ii  grub-efi-amd64          2.06-12
pn  linux-doc-6.1           <none>

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Bug#1035939: linux-image-6.1.0-8-amd64: dmesg flood xhci_hcd 0000:03:00.0: WARN: bandwidth overrun event for slot 6 ep 4 on endpoint Claude Heiland-Allen <claude@mathr.co.uk> - 2023-05-11 14:20 +0200

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