Bug#948550: buster-pu: package e2fsprogs/1.44.5-1+deb10u2
Package: release.debian.org
Severity: normal
Tags: buster
User: release.debian.org@packages.debian.org
Usertags: pu
The reason is to fix two security issues which are fixed in 1.45.5. The
debdiff is attached. Let me know if this looks good for uploading.
Thanks!!
diff -Nru e2fsprogs-1.44.5/debian/changelog e2fsprogs-1.44.5/debian/changelog
--- e2fsprogs-1.44.5/debian/changelog 2019-09-25 13:37:44.000000000 -0400
+++ e2fsprogs-1.44.5/debian/changelog 2020-01-09 20:19:57.000000000 -0500
@@ -1,3 +1,10 @@
+e2fsprogs (1.44.5-1+deb10u3) buster; urgency=medium
+
+ * Fix CVE-2019-5188: potential stack underflow in e2fsck (Closes: #948508)
+ * Fix use after free in e2fsck (Closes: #948517)
+
+ -- Theodore Y. Ts'o <tytso@mit.edu> Thu, 09 Jan 2020 20:19:57 -0500
+
e2fsprogs (1.44.5-1+deb10u2) buster-security; urgency=high
* Fix CVE-2019-5094: potential buffer overrun in e2fsck (Closes: #941139)
diff -Nru e2fsprogs-1.44.5/debian/patches/e2fsck-abort-if-there-is-a-corrupted-directory-block.patch e2fsprogs-1.44.5/debian/patches/e2fsck-abort-if-there-is-a-corrupted-directory-block.patch
--- e2fsprogs-1.44.5/debian/patches/e2fsck-abort-if-there-is-a-corrupted-directory-block.patch 1969-12-31 19:00:00.000000000 -0500
+++ e2fsprogs-1.44.5/debian/patches/e2fsck-abort-if-there-is-a-corrupted-directory-block.patch 2020-01-09 20:19:57.000000000 -0500
@@ -0,0 +1,53 @@
+From: Theodore Ts'o <tytso@mit.edu>
+Date: Thu, 19 Dec 2019 19:37:34 -0500
+Subject: e2fsck: abort if there is a corrupted directory block when rehashing
+
+In e2fsck pass 3a, when we are rehashing directories, at least in
+theory, all of the directories should have had corruptions with
+respect to directory entry structure fixed. However, it's possible
+(for example, if the user declined a fix) that we can reach this stage
+of processing with a corrupted directory entries.
+
+So check for that case and don't try to process a corrupted directory
+block so we don't run into trouble in mutate_name() if there is a
+zero-length file name.
+
+Addresses-Debian-Bug: 948508
+Addresses: TALOS-2019-0973
+Addresses: CVE-2019-5188
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+(cherry picked from commit 8dd73c149f418238f19791f9d666089ef9734dff)
+---
+ e2fsck/rehash.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
+index 7c4ab083..27e1429b 100644
+--- a/e2fsck/rehash.c
++++ b/e2fsck/rehash.c
+@@ -159,6 +159,10 @@ static int fill_dir_block(ext2_filsys fs,
+ dir_offset += rec_len;
+ if (dirent->inode == 0)
+ continue;
++ if ((name_len) == 0) {
++ fd->err = EXT2_ET_DIR_CORRUPTED;
++ return BLOCK_ABORT;
++ }
+ if (!fd->compress && (name_len == 1) &&
+ (dirent->name[0] == '.'))
+ continue;
+@@ -398,6 +402,11 @@ static int duplicate_search_and_fix(e2fsck_t ctx, ext2_filsys fs,
+ continue;
+ }
+ new_len = ext2fs_dirent_name_len(ent->dir);
++ if (new_len == 0) {
++ /* should never happen */
++ ext2fs_unmark_valid(fs);
++ continue;
++ }
+ memcpy(new_name, ent->dir->name, new_len);
+ mutate_name(new_name, &new_len);
+ for (j=0; j < fd->num_array; j++) {
+--
+2.24.1
+
diff -Nru e2fsprogs-1.44.5/debian/patches/e2fsck-don-t-try-to-rehash-a-deleted-directory.patch e2fsprogs-1.44.5/debian/patches/e2fsck-don-t-try-to-rehash-a-deleted-directory.patch
--- e2fsprogs-1.44.5/debian/patches/e2fsck-don-t-try-to-rehash-a-deleted-directory.patch 1969-12-31 19:00:00.000000000 -0500
+++ e2fsprogs-1.44.5/debian/patches/e2fsck-don-t-try-to-rehash-a-deleted-directory.patch 2020-01-09 20:19:57.000000000 -0500
@@ -0,0 +1,47 @@
+From: Theodore Ts'o <tytso@mit.edu>
+Date: Thu, 19 Dec 2019 19:45:06 -0500
+Subject: e2fsck: don't try to rehash a deleted directory
+
+If directory has been deleted in pass1[bcd] processing, then we
+shouldn't try to rehash the directory in pass 3a when we try to
+rehash/reoptimize directories.
+
+Addresses-Debian-Bug: 948508
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+(cherry picked from commit 71ba13755337e19c9a826dfc874562a36e1b24d3)
+---
+ e2fsck/pass1b.c | 4 ++++
+ e2fsck/rehash.c | 2 ++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/e2fsck/pass1b.c b/e2fsck/pass1b.c
+index 5693b9cf..bca701ca 100644
+--- a/e2fsck/pass1b.c
++++ b/e2fsck/pass1b.c
+@@ -705,6 +705,10 @@ static void delete_file(e2fsck_t ctx, ext2_ino_t ino,
+ fix_problem(ctx, PR_1B_BLOCK_ITERATE, &pctx);
+ if (ctx->inode_bad_map)
+ ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
++ if (ctx->inode_reg_map)
++ ext2fs_unmark_inode_bitmap2(ctx->inode_reg_map, ino);
++ ext2fs_unmark_inode_bitmap2(ctx->inode_dir_map, ino);
++ ext2fs_unmark_inode_bitmap2(ctx->inode_used_map, ino);
+ ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(dp->inode.i_mode));
+ quota_data_sub(ctx->qctx, &dp->inode, ino,
+ pb.dup_blocks * fs->blocksize);
+diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
+index 27e1429b..0a5888a9 100644
+--- a/e2fsck/rehash.c
++++ b/e2fsck/rehash.c
+@@ -1024,6 +1024,8 @@ void e2fsck_rehash_directories(e2fsck_t ctx)
+ if (!ext2fs_u32_list_iterate(iter, &ino))
+ break;
+ }
++ if (!ext2fs_test_inode_bitmap2(ctx->inode_dir_map, ino))
++ continue;
+
+ pctx.dir = ino;
+ if (first) {
+--
+2.24.1
+
diff -Nru e2fsprogs-1.44.5/debian/patches/e2fsck-fix-use-after-free-in-calculate_tree.patch e2fsprogs-1.44.5/debian/patches/e2fsck-fix-use-after-free-in-calculate_tree.patch
--- e2fsprogs-1.44.5/debian/patches/e2fsck-fix-use-after-free-in-calculate_tree.patch 1969-12-31 19:00:00.000000000 -0500
+++ e2fsprogs-1.44.5/debian/patches/e2fsck-fix-use-after-free-in-calculate_tree.patch 2020-01-09 20:19:57.000000000 -0500
@@ -0,0 +1,73 @@
+From: Wang Shilong <wshilong@ddn.com>
+Date: Mon, 30 Dec 2019 19:52:39 -0500
+Subject: e2fsck: fix use after free in calculate_tree()
+
+The problem is alloc_blocks() will call get_next_block() which might
+reallocate outdir->buf, and memory address could be changed after
+this. To fix this, pointers that point into outdir->buf, such as
+int_limit and root need to be recaulated based on the new starting
+address of outdir->buf.
+
+[ Changed to correctly recalculate int_limit, and to optimize how we
+ reallocate outdir->buf. -TYT ]
+
+Addresses-Debian-Bug: 948517
+Signed-off-by: Wang Shilong <wshilong@ddn.com>
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+(cherry picked from commit 101e73e99ccafa0403fcb27dd7413033b587ca01)
+---
+ e2fsck/rehash.c | 17 ++++++++++++++++-
+ 1 file changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
+index 0a5888a9..2574e151 100644
+--- a/e2fsck/rehash.c
++++ b/e2fsck/rehash.c
+@@ -295,7 +295,11 @@ static errcode_t get_next_block(ext2_filsys fs, struct out_dir *outdir,
+ errcode_t retval;
+
+ if (outdir->num >= outdir->max) {
+- retval = alloc_size_dir(fs, outdir, outdir->max + 50);
++ int increment = outdir->max / 10;
++
++ if (increment < 50)
++ increment = 50;
++ retval = alloc_size_dir(fs, outdir, outdir->max + increment);
+ if (retval)
+ return retval;
+ }
+@@ -637,6 +641,9 @@ static int alloc_blocks(ext2_filsys fs,
+ if (retval)
+ return retval;
+
++ /* outdir->buf might be reallocated */
++ *prev_ent = (struct ext2_dx_entry *) (outdir->buf + *prev_offset);
++
+ *next_ent = set_int_node(fs, block_start);
+ *limit = (struct ext2_dx_countlimit *)(*next_ent);
+ if (next_offset)
+@@ -726,6 +733,9 @@ static errcode_t calculate_tree(ext2_filsys fs,
+ return retval;
+ }
+ if (c3 == 0) {
++ int delta1 = (char *)int_limit - outdir->buf;
++ int delta2 = (char *)root - outdir->buf;
++
+ retval = alloc_blocks(fs, &limit, &int_ent,
+ &dx_ent, &int_offset,
+ NULL, outdir, i, &c2,
+@@ -733,6 +743,11 @@ static errcode_t calculate_tree(ext2_filsys fs,
+ if (retval)
+ return retval;
+
++ /* outdir->buf might be reallocated */
++ int_limit = (struct ext2_dx_countlimit *)
++ (outdir->buf + delta1);
++ root = (struct ext2_dx_entry *)
++ (outdir->buf + delta2);
+ }
+ dx_ent->block = ext2fs_cpu_to_le32(i);
+ if (c3 != limit->limit)
+--
+2.24.1
+
diff -Nru e2fsprogs-1.44.5/debian/patches/series e2fsprogs-1.44.5/debian/patches/series
--- e2fsprogs-1.44.5/debian/patches/series 2019-09-25 13:37:44.000000000 -0400
+++ e2fsprogs-1.44.5/debian/patches/series 2020-01-09 20:19:57.000000000 -0500
@@ -1,2 +1,5 @@
revert-e4defrag-use-64-bit-counters-to-t.patch
libsupport-add-checks-to-prevent-buffer-.patch
+e2fsck-abort-if-there-is-a-corrupted-directory-block.patch
+e2fsck-don-t-try-to-rehash-a-deleted-directory.patch
+e2fsck-fix-use-after-free-in-calculate_tree.patch
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