Fix disk sector size computation

Signed-off-by: Robbie Harwood <rharwood@redhat.com>

0319-osdep-linux-hostdisk-Modify-sector-by-sysfs-as-disk-.patch

@@ -0,0 +1,70 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mukesh Kumar Chaurasiya <mchauras@linux.vnet.ibm.com>
+Date: Thu, 9 Feb 2023 13:09:16 +0530
+Subject: [PATCH] osdep/linux/hostdisk: Modify sector by sysfs as disk sector
+
+The disk sector size provided by sysfs file system considers the sector
+size of 512 irrespective of disk sector size, thus causing the read by
+the GRUB to an incorrect offset from what was originally intended.
+
+Considering the 512 sector size of sysfs data the actual sector needs to
+be modified corresponding to disk sector size.
+
+Signed-off-by: Mukesh Kumar Chaurasiya <mchauras@linux.vnet.ibm.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+(cherry picked from commit f7564844f82b57078d601befadc438b5bc1fa01b)
+---
+ grub-core/osdep/linux/hostdisk.c | 7 ++++---
+ include/grub/disk.h              | 7 +++++++
+ 2 files changed, 11 insertions(+), 3 deletions(-)
+
+diff --git a/grub-core/osdep/linux/hostdisk.c b/grub-core/osdep/linux/hostdisk.c
+index 7bc99ac1c1..a9ea0bb465 100644
+--- a/grub-core/osdep/linux/hostdisk.c
++++ b/grub-core/osdep/linux/hostdisk.c
+@@ -240,7 +240,8 @@ have_devfs (void)
+ #pragma GCC diagnostic ignored "-Wformat-nonliteral"
+ 
+ static int
+-grub_hostdisk_linux_find_partition (char *dev, grub_disk_addr_t sector)
++grub_hostdisk_linux_find_partition (const grub_disk_t disk, char *dev,
++                                    grub_disk_addr_t sector)
+ {
+   size_t len = strlen (dev);
+   const char *format;
+@@ -305,7 +306,7 @@ grub_hostdisk_linux_find_partition (char *dev, grub_disk_addr_t sector)
+       if (fstat (fd, &st) < 0
+ 	  || !grub_util_device_is_mapped_stat (&st)
+ 	  || !grub_util_get_dm_node_linear_info (st.st_rdev, 0, 0, &start))
+-	start = grub_util_find_partition_start_os (real_dev);
++	start = grub_disk_to_native_sector (disk, grub_util_find_partition_start_os (real_dev));
+       /* We don't care about errors here.  */
+       grub_errno = GRUB_ERR_NONE;
+ 
+@@ -386,7 +387,7 @@ grub_util_fd_open_device (const grub_disk_t disk, grub_disk_addr_t sector, int f
+ 	&& strncmp (dev, "/dev/", 5) == 0)
+       {
+ 	if (sector >= part_start)
+-	  is_partition = grub_hostdisk_linux_find_partition (dev, part_start);
++	  is_partition = grub_hostdisk_linux_find_partition (disk, dev, part_start);
+ 	else
+ 	  *max = part_start - sector;
+       }
+diff --git a/include/grub/disk.h b/include/grub/disk.h
+index 06210a7049..881addcc77 100644
+--- a/include/grub/disk.h
++++ b/include/grub/disk.h
+@@ -208,6 +208,13 @@ grub_disk_from_native_sector (grub_disk_t disk, grub_disk_addr_t sector)
+   return sector << (disk->log_sector_size - GRUB_DISK_SECTOR_BITS);
+ }
+ 
++/* Convert from GRUB native disk sized sector to disk sized sector. */
++static inline grub_disk_addr_t
++grub_disk_to_native_sector (grub_disk_t disk, grub_disk_addr_t sector)
++{
++  return sector >> (disk->log_sector_size - GRUB_DISK_SECTOR_BITS);
++}
++
+ /* This is called from the memory manager.  */
+ void grub_disk_cache_invalidate_all (void);
+ 

grub.patches

@@ -316,3 +316,4 @@ Patch0315: 0315-ieee1275-support-runtime-memory-claiming.patch
 Patch0316: 0316-ieee1275-implement-vec5-for-cas-negotiation.patch
 Patch0317: 0317-ibmvtpm-Add-support-for-trusted-boot-using-a-vTPM-2..patch
 Patch0318: 0318-powerpc-Drop-Open-Hack-Ware.patch
+Patch0319: 0319-osdep-linux-hostdisk-Modify-sector-by-sysfs-as-disk-.patch

grub2.spec

@@ -17,7 +17,7 @@
 Name:		grub2
 Epoch:		1
 Version:	2.06
-Release:	86%{?dist}
+Release:	87%{?dist}
 Summary:	Bootloader with support for Linux, Multiboot and more
 License:	GPLv3+
 URL:		http://www.gnu.org/software/grub/
@@ -544,6 +544,9 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
 %endif
 
 %changelog
+* Thu Feb 16 2023 Robbie Harwood <rharwood@redhat.com> - 2.06-87
+- Fix disk sector size computation
+
 * Fri Feb 10 2023 Robbie Harwood <rharwood@redhat.com> - 2.06-86
 - Override the linker and force nonexecutable stacks