File 0001-fs-xfs-Incorrect-short-form-directory-data... of Package grub2

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File 0001-fs-xfs-Incorrect-short-form-directory-data-boundary-.patch of Package grub2 (Revision 1dac218436a6d596013e239f4ee7d9e4)

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From b541e93b4dab6f652941d086af4fe2da676d0ee3 Mon Sep 17 00:00:00 2001
From: Lidong Chen <lidong.chen@oracle.com>
Date: Thu, 28 Sep 2023 22:33:44 +0000
Subject: [PATCH 1/3] fs/xfs: Incorrect short form directory data boundary
 check

After parsing of the current entry, the entry pointer is advanced
to the next entry at the end of the "for" loop. In case where the
last entry is at the end of the data boundary, the advanced entry
pointer can point off the data boundary. The subsequent boundary
check for the advanced entry pointer can cause a failure.

The fix is to include the boundary check into the "for" loop
condition.

Signed-off-by: Lidong Chen <lidong.chen@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Tested-by: Marta Lewandowska <mlewando@redhat.com>
---
 grub-core/fs/xfs.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/grub-core/fs/xfs.c b/grub-core/fs/xfs.c
index b91cd32b4..ebf962793 100644
--- a/grub-core/fs/xfs.c
+++ b/grub-core/fs/xfs.c
@@ -810,7 +810,8 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
 	if (iterate_dir_call_hook (parent, "..", &ctx))
 	  return 1;
 
-	for (i = 0; i < head->count; i++)
+	for (i = 0; i < head->count &&
+	     (grub_uint8_t *) de < ((grub_uint8_t *) dir + grub_xfs_fshelp_size (dir->data)); i++)
 	  {
 	    grub_uint64_t ino;
 	    grub_uint8_t *inopos = grub_xfs_inline_de_inopos(dir->data, de);
@@ -845,10 +846,6 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
 	    de->name[de->len] = c;
 
 	    de = grub_xfs_inline_next_de(dir->data, head, de);
-
-	    if ((grub_uint8_t *) de >= (grub_uint8_t *) dir + grub_xfs_fshelp_size (dir->data))
-	      return grub_error (GRUB_ERR_BAD_FS, "invalid XFS directory entry");
-
 	  }
 	break;
       }
-- 
2.42.1

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File 0001-fs-xfs-Incorrect-short-form-directory-data-boundary-.patch of Package grub2 (Revision 1dac218436a6d596013e239f4ee7d9e4)

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