tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Merge tag 'fixes-2024-01-28' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock

Pull memblock fix from Mike Rapoport:
"Fix crash when reserved memory is not added to memory.

When CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled, the initialization
of reserved pages may cause access of NODE_DATA() with invalid nid and
crash.

Add a fall back to early_pfn_to_nid() in memmap_init_reserved_pages()
to ensure a valid node id is always passed to init_reserved_page()"

* tag 'fixes-2024-01-28' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
memblock: fix crash when reserved memory is not added to memory

Linus Torvalds a08ebda9 8a696a29

+3
+3
mm/memblock.c
··· 2176 2176 start = region->base; 2177 2177 end = start + region->size; 2178 2178 2179 + if (nid == NUMA_NO_NODE || nid >= MAX_NUMNODES) 2180 + nid = early_pfn_to_nid(PFN_DOWN(start)); 2181 + 2179 2182 reserve_bootmem_region(start, end, nid); 2180 2183 } 2181 2184 }