[Crash-utility] [PATCH v3 2/3] Fix page offset issue when converting physical to virtual address

[Tao Liu]

When trying to convert a physical address to its virtual
address in dump_vmap_area() and dump_vmlist(), the vi->retval
is added by 2 values: the page aligned address "pcheck"
and page offset address "PAGEOFFSET(paddr)".

However "paddr" is given by "pcheck", is also page aligned,
so "PAGEOFFSET(paddr)" is always 0.

In this patch, we will use PAGEOFFSET(vi->spec_addr) to give the
page offset, vi->spec_addr is the physical address we'd like
to convert, which contains the correct page offset.

Signed-off-by: Tao Liu <ltao at redhat.com>
---
 memory.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/memory.c b/memory.c
index 9ab5781..1b6f9ba 100644
--- a/memory.c
+++ b/memory.c
@@ -8861,7 +8861,7 @@ dump_vmlist(struct meminfo *vi)
 				    (vi->spec_addr < (paddr+PAGESIZE()))) {
 					if (vi->flags & GET_PHYS_TO_VMALLOC) {
 						vi->retval = pcheck +
-						    PAGEOFFSET(paddr);
+						    PAGEOFFSET(vi->spec_addr);
 						return;
 				        } else
 						fprintf(fp,
@@ -9010,7 +9010,7 @@ dump_vmap_area(struct meminfo *vi)
 				    (vi->spec_addr < (paddr+PAGESIZE()))) {
 					if (vi->flags & GET_PHYS_TO_VMALLOC) {
 						vi->retval = pcheck +
-						    PAGEOFFSET(paddr);
+						    PAGEOFFSET(vi->spec_addr);
 						FREEBUF(ld->list_ptr);
 						return;
 				        } else
-- 
2.33.1