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eabdullin 2024-04-30 15:37:38 +00:00
parent 8672b06550
commit 45b4e899b8
6 changed files with 7478 additions and 4 deletions
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.e2fsprogs.metadata
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ac1bc5da111dd37bd3e6e4783a753b33853034f6 SOURCES/e2fsprogs-1.46.5.tar.sign
9ff30a21d653e75728127ab165bda1749f157be0 SOURCES/e2fsprogs-1.46.5.tar.xz
e3d3e09e9dceeb7eaa5ecec3a7ba51cc4d936b6d SOURCES/tytso-key.asc
cdfef2589798e1ffe2c1aeddc09597181ebe4ecc SOURCES/signed_hash_image.gz
6bd4d0a8c4d4f61545c39c2a8f575b5c31329bdd SOURCES/unsigned_hash_image.gz

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.gitignore vendored
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SOURCES/e2fsprogs-1.46.5.tar.sign
SOURCES/e2fsprogs-1.46.5.tar.xz
SOURCES/tytso-key.asc
SOURCES/signed_hash_image.gz
SOURCES/unsigned_hash_image.gz

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SOURCES/e2fsprogs-1.46.6-Change-the-xattr-entry-hash-to-use-an-unsighed-char-.patch Normal file
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From 38e988643a085ee804b5274fc39bc8a4befe6106 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Sat, 28 Jan 2023 01:22:29 -0500
Subject: [PATCH] Change the xattr entry hash to use an unsighed char by
default
Starting in Linux 6.2, char is forced to always unsigned when
compiling the kernel, even on those platforms (such as x86) where char
was traditionally signed. This exposed a bug in ext4, where when
calculating the extended attribute entry hash, we used a char value
from the extended attribute name. This resulted with the entry hash,
which is stored on-disk, to variable depending on whether the plaform
used a signed or unsigned char.
Fortunately, the xattr names tend to be ASCII characters with the 8th
bit zero, so it wasn't noticed two decades (this bugs dates back to
the introduction of extended attribute support to ext2 in 2.5.46).
However, when this change was made in v6.2-rc1, the inconsistency
between the extended attribute hash calculated by e2fsprogs (which was
still using a signed char on x86) was different from an x86 kernel,
and this triggered a test failure in generic/454.
This was fixed in kernel commit f3bbac32475b (" ext4: deal with legacy
signed xattr name hash values"), where Linus decreed that it wasn't
worth it to fix this the same way we had addressed has used by the
dir_index feature. Instead, starting in the 6.2 kernel, ext4 will
accept both the hash calculated using signed and unsigned chars, but
set the entry hash using the unsigned char. This commit makes
e2fsprogs follow suit.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
---
e2fsck/pass1.c | 15 ++++--
lib/ext2fs/ext2fs.h | 6 +++
lib/ext2fs/ext_attr.c | 78 +++++++++++++++++++++++++-----
tests/f_ea_signed_hash/expect.1 | 7 +++
tests/f_ea_signed_hash/image.gz | Bin 0 -> 1128 bytes
tests/f_ea_signed_hash/script | 2 +
tests/f_ea_unsigned_hash/expect.1 | 7 +++
tests/f_ea_unsigned_hash/image.gz | Bin 0 -> 1321 bytes
tests/f_ea_unsigned_hash/script | 2 +
9 files changed, 102 insertions(+), 15 deletions(-)
create mode 100644 tests/f_ea_signed_hash/expect.1
create mode 100644 tests/f_ea_signed_hash/image.gz
create mode 100644 tests/f_ea_signed_hash/script
create mode 100644 tests/f_ea_unsigned_hash/expect.1
create mode 100644 tests/f_ea_unsigned_hash/image.gz
create mode 100644 tests/f_ea_unsigned_hash/script
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index bcf337c2..78540119 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -331,7 +331,7 @@ static problem_t check_large_ea_inode(e2fsck_t ctx,
blk64_t *quota_blocks)
{
struct ext2_inode inode;
- __u32 hash;
+ __u32 hash, signed_hash;
errcode_t retval;
/* Check if inode is within valid range */
@@ -343,7 +343,8 @@ static problem_t check_large_ea_inode(e2fsck_t ctx,
e2fsck_read_inode(ctx, entry->e_value_inum, &inode, "pass1");
- retval = ext2fs_ext_attr_hash_entry2(ctx->fs, entry, NULL, &hash);
+ retval = ext2fs_ext_attr_hash_entry3(ctx->fs, entry, NULL, &hash,
+ &signed_hash);
if (retval) {
com_err("check_large_ea_inode", retval,
_("while hashing entry with e_value_inum = %u"),
@@ -351,7 +352,7 @@ static problem_t check_large_ea_inode(e2fsck_t ctx,
fatal_error(ctx, 0);
}
- if (hash == entry->e_hash) {
+ if ((hash == entry->e_hash) || (signed_hash == entry->e_hash)) {
*quota_blocks = size_to_quota_blocks(ctx->fs,
entry->e_value_size);
} else {
@@ -495,7 +496,10 @@ static void check_ea_in_inode(e2fsck_t ctx, struct problem_context *pctx,
}
hash = ext2fs_ext_attr_hash_entry(entry,
- start + entry->e_value_offs);
+ start + entry->e_value_offs);
+ if (entry->e_hash != 0 && entry->e_hash != hash)
+ hash = ext2fs_ext_attr_hash_entry_signed(entry,
+ start + entry->e_value_offs);
/* e_hash may be 0 in older inode's ea */
if (entry->e_hash != 0 && entry->e_hash != hash) {
@@ -2573,6 +2577,9 @@ static int check_ext_attr(e2fsck_t ctx, struct problem_context *pctx,
hash = ext2fs_ext_attr_hash_entry(entry, block_buf +
entry->e_value_offs);
+ if (entry->e_hash != hash)
+ hash = ext2fs_ext_attr_hash_entry_signed(entry,
+ block_buf + entry->e_value_offs);
if (entry->e_hash != hash) {
pctx->num = entry->e_hash;
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 59f24ca9..b5477c10 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -1263,9 +1263,15 @@ extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);
/* ext_attr.c */
extern __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry,
void *data);
+extern __u32 ext2fs_ext_attr_hash_entry_signed(struct ext2_ext_attr_entry *entry,
+ void *data);
extern errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs,
struct ext2_ext_attr_entry *entry,
void *data, __u32 *hash);
+extern errcode_t ext2fs_ext_attr_hash_entry3(ext2_filsys fs,
+ struct ext2_ext_attr_entry *entry,
+ void *data, __u32 *hash,
+ __u32 *signed_hash);
extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
extern errcode_t ext2fs_read_ext_attr2(ext2_filsys fs, blk64_t block,
void *buf);
diff --git a/lib/ext2fs/ext_attr.c b/lib/ext2fs/ext_attr.c
index efe4d29f..5525045c 100644
--- a/lib/ext2fs/ext_attr.c
+++ b/lib/ext2fs/ext_attr.c
@@ -48,7 +48,8 @@ static errcode_t read_ea_inode_hash(ext2_filsys fs, ext2_ino_t ino, __u32 *hash)
__u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry, void *data)
{
__u32 hash = 0;
- char *name = ((char *) entry) + sizeof(struct ext2_ext_attr_entry);
+ unsigned char *name = (((unsigned char *) entry) +
+ sizeof(struct ext2_ext_attr_entry));
int n;
for (n = 0; n < entry->e_name_len; n++) {
@@ -71,18 +72,51 @@ __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry, void *data)
return hash;
}
+__u32 ext2fs_ext_attr_hash_entry_signed(struct ext2_ext_attr_entry *entry,
+ void *data)
+{
+ __u32 hash = 0;
+ signed char *name = (((signed char *) entry) +
+ sizeof(struct ext2_ext_attr_entry));
+ int n;
+
+ for (n = 0; n < entry->e_name_len; n++) {
+ hash = (hash << NAME_HASH_SHIFT) ^
+ (hash >> (8*sizeof(hash) - NAME_HASH_SHIFT)) ^
+ *name++;
+ }
+
+ /* The hash needs to be calculated on the data in little-endian. */
+ if (entry->e_value_inum == 0 && entry->e_value_size != 0) {
+ __u32 *value = (__u32 *)data;
+ for (n = (entry->e_value_size + EXT2_EXT_ATTR_ROUND) >>
+ EXT2_EXT_ATTR_PAD_BITS; n; n--) {
+ hash = (hash << VALUE_HASH_SHIFT) ^
+ (hash >> (8*sizeof(hash) - VALUE_HASH_SHIFT)) ^
+ ext2fs_le32_to_cpu(*value++);
+ }
+ }
+
+ return hash;
+}
+
+
/*
- * ext2fs_ext_attr_hash_entry2()
+ * ext2fs_ext_attr_hash_entry3()
*
- * Compute the hash of an extended attribute.
- * This version of the function supports hashing entries that reference
- * external inodes (ea_inode feature).
+ * Compute the hash of an extended attribute. This version of the
+ * function supports hashing entries that reference external inodes
+ * (ea_inode feature) as well as calculating the old legacy signed
+ * hash variant.
*/
-errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs,
+errcode_t ext2fs_ext_attr_hash_entry3(ext2_filsys fs,
struct ext2_ext_attr_entry *entry,
- void *data, __u32 *hash)
+ void *data, __u32 *hash,
+ __u32 *signed_hash)
{
*hash = ext2fs_ext_attr_hash_entry(entry, data);
+ if (signed_hash)
+ *signed_hash = ext2fs_ext_attr_hash_entry_signed(entry, data);
if (entry->e_value_inum) {
__u32 ea_inode_hash;
@@ -96,10 +130,29 @@ errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs,
*hash = (*hash << VALUE_HASH_SHIFT) ^
(*hash >> (8*sizeof(*hash) - VALUE_HASH_SHIFT)) ^
ea_inode_hash;
+ if (signed_hash)
+ *signed_hash = (*signed_hash << VALUE_HASH_SHIFT) ^
+ (*signed_hash >> (8*sizeof(*hash) -
+ VALUE_HASH_SHIFT)) ^
+ ea_inode_hash;
}
return 0;
}
+/*
+ * ext2fs_ext_attr_hash_entry2()
+ *
+ * Compute the hash of an extended attribute.
+ * This version of the function supports hashing entries that reference
+ * external inodes (ea_inode feature).
+ */
+errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs,
+ struct ext2_ext_attr_entry *entry,
+ void *data, __u32 *hash)
+{
+ return ext2fs_ext_attr_hash_entry3(fs, entry, data, hash, NULL);
+}
+
#undef NAME_HASH_SHIFT
#undef VALUE_HASH_SHIFT
@@ -940,15 +993,18 @@ static errcode_t read_xattrs_from_buffer(struct ext2_xattr_handle *handle,
/* e_hash may be 0 in older inode's ea */
if (entry->e_hash != 0) {
- __u32 hash;
+ __u32 hash, signed_hash;
+
void *data = (entry->e_value_inum != 0) ?
0 : value_start + entry->e_value_offs;
- err = ext2fs_ext_attr_hash_entry2(handle->fs, entry,
- data, &hash);
+ err = ext2fs_ext_attr_hash_entry3(handle->fs, entry,
+ data, &hash,
+ &signed_hash);
if (err)
return err;
- if (entry->e_hash != hash) {
+ if ((entry->e_hash != hash) &&
+ (entry->e_hash != signed_hash)) {
struct ext2_inode child;
/* Check whether this is an old Lustre-style
diff --git a/tests/f_ea_signed_hash/expect.1 b/tests/f_ea_signed_hash/expect.1
new file mode 100644
index 00000000..5f2b47ac
--- /dev/null
+++ b/tests/f_ea_signed_hash/expect.1
@@ -0,0 +1,7 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 16/24 files (0.0% non-contiguous), 29/200 blocks
+Exit status is 0
diff --git a/tests/f_ea_signed_hash/script b/tests/f_ea_signed_hash/script
new file mode 100644
index 00000000..8ab2b9c6
--- /dev/null
+++ b/tests/f_ea_signed_hash/script
@@ -0,0 +1,2 @@
+ONE_PASS_ONLY="true"
+. $cmd_dir/run_e2fsck
diff --git a/tests/f_ea_unsigned_hash/expect.1 b/tests/f_ea_unsigned_hash/expect.1
new file mode 100644
index 00000000..5f2b47ac
--- /dev/null
+++ b/tests/f_ea_unsigned_hash/expect.1
@@ -0,0 +1,7 @@
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 16/24 files (0.0% non-contiguous), 29/200 blocks
+Exit status is 0
diff --git a/tests/f_ea_unsigned_hash/script b/tests/f_ea_unsigned_hash/script
new file mode 100644
index 00000000..8ab2b9c6
--- /dev/null
+++ b/tests/f_ea_unsigned_hash/script
@@ -0,0 +1,2 @@
+ONE_PASS_ONLY="true"
+. $cmd_dir/run_e2fsck
--
2.39.3

7161
SOURCES/tytso-key.asc Normal file
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SPECS/e2fsprogs.spec
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@ -1,7 +1,7 @@
Summary: Utilities for managing ext2, ext3, and ext4 file systems
Name: e2fsprogs
Version: 1.46.5
Release: 3%{?dist}
Release: 5%{?dist}
# License tags based on COPYING file distinctions for various components
License: GPLv2
@ -14,6 +14,9 @@ Source1: https://www.kernel.org/pub/linux/kernel/people/tytso/%{name}/v%{version
# same as the above key ( http://web.mit.edu/tytso/www/home.html )
Source2: tytso-key.asc
Source3: signed_hash_image.gz
Source4: unsigned_hash_image.gz
Url: http://e2fsprogs.sourceforge.net/
Requires: e2fsprogs-libs%{?_isa} = %{version}-%{release}
Requires: libcom_err%{?_isa} = %{version}-%{release}
@ -41,7 +44,8 @@ BuildRequires: gnupg2 xz
Patch0: 0001-Remove-local-PATH.patch
Patch1: 0002-man-Add-note-about-RHEL9-supported-features-and-moun.patch
Patch2: 0003-mke2fs.conf-Introduce-rhel6-rhel7-and-rhel8-fs_type.patch
Patch3: e2fsprogs-libext2fs-add-sanity-check-to-extent-manipulation.patch
Patch3: e2fsprogs-libext2fs-add-sanity-check-to-extent-manipulation.patch
Patch4: e2fsprogs-1.46.6-Change-the-xattr-entry-hash-to-use-an-unsighed-char-.patch
%description
The e2fsprogs package contains a number of utilities for creating,
@ -175,9 +179,12 @@ xzcat '%{SOURCE0}' | %{gpgverify} --keyring='%{SOURCE2}' --signature='%{SOURCE1}
%patch1 -p1
%patch2 -p1
%patch3 -p1
%patch4 -p1
# Remove flawed tests
rm -rf tests/m_rootdir_acl
install -p -m 0644 %{SOURCE3} tests/f_ea_signed_hash/image.gz
install -p -m 0644 %{SOURCE4} tests/f_ea_unsigned_hash/image.gz
%global _udevdir %{_prefix}/lib/udev/rules.d
@ -345,6 +352,14 @@ make PRINT_FAILED=yes fullcheck
%{_udevdir}/96-e2scrub.rules
%changelog
* Wed Dec 13 2023 Carlos Maiolino <cmaiolino@redhat.com> - 1.46.5-5
- rebuild to incorporate libss-devel package
- Related: RHEL-19059
* Wed Oct 17 2023 Carlos Maiolino <cmaiolino@redhat.com> - 1.46.5-4
- Change the xattr entry hash to use an unsighed char by default
- Related: RHEL-10467
* Fri May 13 2022 Lukas Czerner <lczerner@redhat.com> 1.46.5-3
- Add sanity check to extent manipulation (#2073549)