49 lines
1.5 KiB
Diff
49 lines
1.5 KiB
Diff
From 045aae8fe7238aabc217700df4d17d83b7d891f3 Mon Sep 17 00:00:00 2001
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From: Michael Chang <mchang@suse.com>
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Date: Tue, 23 Jan 2024 12:46:16 +0800
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Subject: [PATCH] fs/xfs: always verify the total number of entries is not zero
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---
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grub-core/fs/xfs.c | 12 ++++++------
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1 file changed, 6 insertions(+), 6 deletions(-)
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diff --git a/grub-core/fs/xfs.c b/grub-core/fs/xfs.c
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index bc2224dbb..1ce5fa4fc 100644
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--- a/grub-core/fs/xfs.c
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+++ b/grub-core/fs/xfs.c
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@@ -900,6 +900,8 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
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{
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struct grub_xfs_dir2_entry *direntry =
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grub_xfs_first_de(dir->data, dirblock);
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+ struct grub_xfs_dirblock_tail *tail = grub_xfs_dir_tail (dir->data, dirblock);
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+
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int entries = -1;
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char *end = dirblock + dirblk_size;
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@@ -918,18 +920,16 @@ grub_xfs_iterate_dir (grub_fshelp_node_t dir,
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*/
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if (dir->inode.nextents == grub_cpu_to_be32_compile_time (1))
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{
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- struct grub_xfs_dirblock_tail *tail = grub_xfs_dir_tail (dir->data, dirblock);
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-
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end = (char *) tail;
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/* Subtract the space used by leaf nodes. */
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end -= grub_be_to_cpu32 (tail->leaf_count) * sizeof (struct grub_xfs_dir_leaf_entry);
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+ }
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- entries = grub_be_to_cpu32 (tail->leaf_count) - grub_be_to_cpu32 (tail->leaf_stale);
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+ entries = grub_be_to_cpu32 (tail->leaf_count) - grub_be_to_cpu32 (tail->leaf_stale);
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- if (!entries)
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- continue;
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- }
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+ if (!entries)
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+ continue;
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/* Iterate over all entries within this block. */
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while ((char *) direntry < (char *) end)
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--
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2.43.0
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