Kernel panic - not syncing: System is deadlocked on memory

[尹国宇 <244511015@csu.edu.cn>]

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Hi,
When I test the Linux kernel (commit 38fec10eb60d687e30c8c6b5420d86e8149f7557), I encountered a kernel panic issue related to memory allocation, specifically in the alloc_pages_mpol function. The panic message indicates "System is deadlocked on memory," and the call trace points to __alloc_frozen_pages_noprof failing to allocate pages, leading to an OOM condition.
The error originates in alloc_pages_mpol, which calls policy_nodemask to determine the nodemask and nid for memory allocation. The subsequent call to __alloc_frozen_pages_noprof fails when the system runs out of memory, with no swap available and no killable processes. 
This crash can be triggered by executing the provided C reproducer multiple times. The reproducer performs a series of system calls (e.g., file creation, perf_event_open, io_submit, and filesystem mounts), which likely stress the memory management system and expose the bug.
This can be reproduced on:
HEAD commit: 
38fec10eb60d687e30c8c6b5420d86e8149f7557 
console output : https://pastebin.com/raw/T4dfWHSf
kernel config : https://pastebin.com/raw/u0Efyj5P
C reproducer : https://pastebin.com/raw/3hPqjF6M



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