Commit b0217d97 authored by Vivian Wang's avatar Vivian Wang Committed by Paul Walmsley
Browse files

riscv: mm: WARN_ON() for bad addresses in vmemmap_populate() 



Similarly to the same check in arch/arm64/mm/mmu.c, in
vmemmap_populate(), add a warning for start and end being outside of the
range of vmemmap.

Signed-off-by: default avatarVivian Wang <wangruikang@iscas.ac.cn>
Link: https://patch.msgid.link/20260309-riscv-sparsemem-vmemmap-limits-v1-1-f40efe18e3cd@iscas.ac.cn


Signed-off-by: default avatarPaul Walmsley <pjw@kernel.org>
parent dd598449

arch/riscv/mm/init.c

+2 −0
Original line number Diff line number Diff line
@@ -1448,6 +1448,8 @@ int __meminit vmemmap_check_pmd(pmd_t *pmdp, int node, 
int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,

			       struct vmem_altmap *altmap)

{

	WARN_ON((start < VMEMMAP_START) || (end > VMEMMAP_END));



	/*

	 * Note that SPARSEMEM_VMEMMAP is only selected for rv64 and that we

	 * can't use hugepage mappings for 2-level page table because in case of