Re: [Crash-utility] [PATCH 1/2] SLAB: Fix for "kmem -s|-S" options on Linux 6.1 and later

Kernel commit e36ce448a08d ("mm/slab: use kmalloc_node() for off slab freelist_idx_t array allocation"), which is contained in Linux 6.1 and later kernels, removed kmem_cache.freelist_cache member. Without the patch, crash does not set SLAB_OVERLOAD_PAGE and "kmem -s|-S" options fail with the following error: kmem: invalid structure member offset: slab_list FILE: memory.c LINE: 12156 FUNCTION: verify_slab_v2() Use kmem_cache.freelist_size instead, which was instroduced together with kmem_cache.freelist_cache by kernel commit 8456a648cf44.

Signed-off-by: Kazuhito Hagio <k-hagio-ab(a)nec.com&gt; --- memory.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/memory.c b/memory.c index 625a94b7d7d4..71ded688206f 100644 --- a/memory.c +++ b/memory.c @@ -535,8 +535,11 @@ vm_init(void) /* * slab: overload struct slab over struct page * https://lkml.org/lkml/2013/10/16/155 + * + * commit e36ce448a08d removed kmem_cache.freelist_cache in 6.1, + * so use freelist_size instead. */ - if (MEMBER_EXISTS("kmem_cache", "freelist_cache")) { + if (MEMBER_EXISTS("kmem_cache", "freelist_size")) { vt->flags |= SLAB_OVERLOAD_PAGE; ANON_MEMBER_OFFSET_INIT(page_s_mem, "page", "s_mem"); ANON_MEMBER_OFFSET_INIT(page_freelist, "page", "freelist"); -- 2.31.1