[Kernel Bug] INFO: rcu detected stall in sys_access

[Longxing Li]

Dear Linux kernel developers and maintainers,

We would like to report a new kernel bug found by our tool. INFO: rcu
detected stall in sys_access. Details are as follows.

Kernel commit: v7.0.6
Kernel config: see attachment
report: see attachment
C repro and Syz repro: see attachment

We are currently analyzing the root cause and working on a
reproducible PoC. We will provide further updates in this thread as
soon as we have more information.

Best regards,
Longxing Li

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https://drive.google.com/file/d/1Bx2unEf-QntjVi8g6Zw7QNO6OP4cjGO_/view?usp=drive_link

https://drive.google.com/file/d/1cvpuS8Y99IptkeuAJKWZ50imXnRVxWG-/view?usp=drive_link

https://drive.google.com/file/d/1LDdjEA18US3bYj2kI4CezjM_sxB7CMZB/view?usp=drive_link

https://drive.google.com/file/d/1vJC-NIkO8REnrdJOz_6afUnjrR01BByt/view?usp=drive_link

[Matthew Wilcox]

On Tue, Jun 09, 2026 at 07:44:50PM +0800, Longxing Li wrote:
> Dear Linux kernel developers and maintainers,
>
> We would like to report a new kernel bug found by our tool. INFO: rcu
> detected stall in sys_access. Details are as follows.

Please work to get your changes into upstream syzkaller as it is much
easier for us to work with syzbot than with individuals.