[Crash-utility] [PATCH] kmem: fix the determination of slab page due to invalid page_type
There is fail when excute "kmem -i" on ARM64+kernel-5.10 vmcore:
crash> kmem -i
kmem: invalid kernel virtual address: ffffffff0be00030 type: "page_type"
The slab page is determined by the PG_slab bit of page flag on this vmcore,
when traverse the pages of sparse memory, page_slab() fails to readmem
page_type for a invalid page. Fix this by enhance the determination of slab page.
Signed-off-by: qiwu.chen <qiwu.chen(a)transsion.com>
---
memory.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/memory.c b/memory.c
index 8c01ed0..e4a058a 100644
--- a/memory.c
+++ b/memory.c
@@ -374,6 +374,8 @@ static bool page_slab(ulong page, ulong flags)
if (vt->flags & SLAB_PAGEFLAGS) {
if ((flags >> vt->PG_slab) & 1)
return TRUE;
+ else
+ return FALSE;
}
if (VALID_MEMBER(page_page_type)) {
--
2.25.1