Bug#1111455: [bp@imp.ch: Bug#1111455: linux-image-6.12.41+deb13-amd64: kernel BUG at fs/netfs/read_collect.c:316 netfs: Can't donate prior to front]

[Benoit Panizzon <benoit.panizzon@imp.ch>]

Hi Salvatore

> A user in Debian reported the following kernel oops when running on
> 6.12.41 (but apparently as well on older versions, though there were
> several netfs related similar issues, so including Max Kellermann as
> well in the recipients)

Thanks for looking into this issue. 6.1 from bookworm did not crash
since this morning.

Installed 6.16 from debian experimental - just the linux-image package.

Linux go 6.16-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.16.1-1~exp1 (2025-08-16) x86_64 GNU/Linux

Running cachefilesd, /home on NFS

25 minutes uptime. 6.12 would for have oopsed before. Mostly in the
first 5 minutes.

I have upgraded several machines from Bookworm to Trixie - some make
use of NFS but none as heavily as my office workstation with /home on
NFS. All the other machines are either on ARM or INTEL metal or
virtualised KVM machines. Not seen that issue on those other machines.

I suspect it could be a problem affecting only that specific CPU indeed
hitting an invalid opcode.

vendor_id	: AuthenticAMD
cpu family	: 25
model		: 80
model name	: AMD Ryzen 7 PRO 5750GE with Radeon Graphics
stepping	: 0
microcode	: 0xa500011

Mit freundlichen Grüssen

-Benoît Panizzon-
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