diff -Nru makedumpfile-1.6.6/debian/changelog makedumpfile-1.6.6/debian/changelog
--- makedumpfile-1.6.6/debian/changelog	2019-12-18 14:38:51.000000000 -0300
+++ makedumpfile-1.6.6/debian/changelog	2020-01-03 16:58:16.000000000 -0300
@@ -1,3 +1,11 @@
+makedumpfile (1:1.6.6-4ubuntu2) focal; urgency=medium
+
+  * x86_64: Fix an error due to makedumpfile being out-of-sync with recent
+    kernels. To achieve that, add the following patch: "Increase
+    SECTION_MAP_LAST_BIT to 4". (LP: #1857616)
+
+ -- Guilherme G. Piccoli <gpiccoli@canonical.com>  Fri, 03 Jan 2020 16:57:00 -0300
+
 makedumpfile (1:1.6.6-4ubuntu1) focal; urgency=medium
 
   [ Thadeu Lima de Souza Cascardo ]
diff -Nru makedumpfile-1.6.6/debian/patches/0003-Increase-SECTION_MAP_LAST_BIT-to-4.patch makedumpfile-1.6.6/debian/patches/0003-Increase-SECTION_MAP_LAST_BIT-to-4.patch
--- makedumpfile-1.6.6/debian/patches/0003-Increase-SECTION_MAP_LAST_BIT-to-4.patch	1969-12-31 21:00:00.000000000 -0300
+++ makedumpfile-1.6.6/debian/patches/0003-Increase-SECTION_MAP_LAST_BIT-to-4.patch	2020-01-03 16:55:52.000000000 -0300
@@ -0,0 +1,37 @@
+Author: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
+Date: Tue, 23 Jul 2019 12:24:47 -0400
+Subject: Increase SECTION_MAP_LAST_BIT to 4
+
+kernel commit 326e1b8f83a4 ("mm/sparsemem: introduce a SECTION_IS_EARLY
+flag") added the flag to mem_section->section_mem_map value, and it caused
+makedumpfile an error like the following:
+
+  readmem: Can't convert a virtual address(fffffc97d1000000) to physical address.
+  readmem: type_addr: 0, addr:fffffc97d1000000, size:32768
+  __exclude_unnecessary_pages: Can't read the buffer of struct page.
+  create_2nd_bitmap: Can't exclude unnecessary pages.
+
+To fix this, SECTION_MAP_LAST_BIT needs to be updated. The bit has not
+been used until the addition, so we can just increase the value.
+
+Signed-off-by: Kazuhito Hagio <k-hagio@ab.jp.nec.com>
+---
+ makedumpfile.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/makedumpfile.h b/makedumpfile.h
+index 24b2f69..df745b9 100644
+--- a/makedumpfile.h
++++ b/makedumpfile.h
+@@ -195,7 +195,7 @@ isAnon(unsigned long mapping)
+  *  2. it has been verified that (1UL<<2) was never set, so it is
+  *     safe to mask that bit off even in old kernels.
+  */
+-#define SECTION_MAP_LAST_BIT	(1UL<<3)
++#define SECTION_MAP_LAST_BIT	(1UL<<4)
+ #define SECTION_MAP_MASK	(~(SECTION_MAP_LAST_BIT-1))
+ #define NR_SECTION_ROOTS()	divideup(num_section, SECTIONS_PER_ROOT())
+ #define SECTION_NR_TO_PFN(sec)	((sec) << PFN_SECTION_SHIFT())
+-- 
+2.24.0
+
diff -Nru makedumpfile-1.6.6/debian/patches/series makedumpfile-1.6.6/debian/patches/series
--- makedumpfile-1.6.6/debian/patches/series	2019-12-18 14:38:51.000000000 -0300
+++ makedumpfile-1.6.6/debian/patches/series	2020-01-03 16:55:52.000000000 -0300
@@ -1,2 +1,3 @@
 0001-Remove-libebl-linkage.patch
 0002-adapt-makefile-to-debian.patch
+0003-Increase-SECTION_MAP_LAST_BIT-to-4.patch