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@@ -1,59 +0,0 @@
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-From ab51d587bb9b229b1fade1afd02e1574c1ba5c76 Mon Sep 17 00:00:00 2001
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-From: Lukas Czerner <lczerner@redhat.com>
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-Date: Thu, 21 Apr 2022 19:31:48 +0200
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-Subject: libext2fs: add sanity check to extent manipulation
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-
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-It is possible to have a corrupted extent tree in such a way that a leaf
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-node contains zero extents in it. Currently if that happens and we try
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-to traverse the tree we can end up accessing wrong data, or possibly
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-even uninitialized memory. Make sure we don't do that.
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-
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-Additionally make sure that we have a sane number of bytes passed to
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-memmove() in ext2fs_extent_delete().
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-
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-Note that e2fsck is currently unable to spot and fix such corruption in
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-pass1.
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-
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-Signed-off-by: Lukas Czerner <lczerner@redhat.com>
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-Reported-by: Nils Bars <nils_bars@t-online.de>
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-Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=2068113
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-Addresses: CVE-2022-1304
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-Addresses-Debian-Bug: #1010263
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-Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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-
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-[Retrieved from:
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-https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/commit/?h=maint&id=ab51d587bb9b229b1fade1afd02e1574c1ba5c76]
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-Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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----
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- lib/ext2fs/extent.c | 8 ++++++++
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- 1 file changed, 8 insertions(+)
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-
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-diff --git a/lib/ext2fs/extent.c b/lib/ext2fs/extent.c
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-index b324c7b0..1a206a16 100644
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---- a/lib/ext2fs/extent.c
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-+++ b/lib/ext2fs/extent.c
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-@@ -495,6 +495,10 @@ retry:
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- ext2fs_le16_to_cpu(eh->eh_entries);
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- newpath->max_entries = ext2fs_le16_to_cpu(eh->eh_max);
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-
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-+ /* Make sure there is at least one extent present */
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-+ if (newpath->left <= 0)
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-+ return EXT2_ET_EXTENT_NO_DOWN;
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-+
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- if (path->left > 0) {
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- ix++;
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- newpath->end_blk = ext2fs_le32_to_cpu(ix->ei_block);
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-@@ -1630,6 +1634,10 @@ errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags)
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-
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- cp = path->curr;
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-
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-+ /* Sanity check before memmove() */
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-+ if (path->left < 0)
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-+ return EXT2_ET_EXTENT_LEAF_BAD;
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-+
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- if (path->left) {
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- memmove(cp, cp + sizeof(struct ext3_extent_idx),
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- path->left * sizeof(struct ext3_extent_idx));
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---
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-cgit
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-
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Bernd Kuhls