6.6-stable patches

added patches:
	ext4-filesystems-without-casefold-feature-cannot-be-mounted-with-siphash.patch

diff --git a/queue-6.6/ext4-filesystems-without-casefold-feature-cannot-be-mounted-with-siphash.patch b/queue-6.6/ext4-filesystems-without-casefold-feature-cannot-be-mounted-with-siphash.patch
new file mode 100644 (file)
index 0000000..a4d4f28
--- /dev/null
+++ b/queue-6.6/ext4-filesystems-without-casefold-feature-cannot-be-mounted-with-siphash.patch
@@ -0,0 +1,43 @@
+From stable+bounces-206360-greg=kroah.com@vger.kernel.org Thu Jan  8 16:14:10 2026
+From: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
+Date: Thu,  8 Jan 2026 12:03:49 -0300
+Subject: ext4: filesystems without casefold feature cannot be mounted with siphash
+To: stable@vger.kernel.org
+Cc: Gabriel Krisman Bertazi <krisman@suse.de>, Lizhi Xu <lizhi.xu@windriver.com>, syzbot+340581ba9dceb7e06fb3@syzkaller.appspotmail.com, Theodore Ts'o <tytso@mit.edu>, Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
+Message-ID: <20260108150350.3354622-1-cascardo@igalia.com>
+
+From: Lizhi Xu <lizhi.xu@windriver.com>
+
+commit 985b67cd86392310d9e9326de941c22fc9340eec upstream.
+
+When mounting the ext4 filesystem, if the default hash version is set to
+DX_HASH_SIPHASH but the casefold feature is not set, exit the mounting.
+
+Reported-by: syzbot+340581ba9dceb7e06fb3@syzkaller.appspotmail.com
+Signed-off-by: Lizhi Xu <lizhi.xu@windriver.com>
+Link: https://patch.msgid.link/20240605012335.44086-1-lizhi.xu@windriver.com
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+[cascardo: small conflict fixup]
+Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ fs/ext4/super.c |    8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+--- a/fs/ext4/super.c
++++ b/fs/ext4/super.c
+@@ -3632,6 +3632,14 @@ int ext4_feature_set_ok(struct super_blo
+       }
+ #endif
+ 
++      if (EXT4_SB(sb)->s_es->s_def_hash_version == DX_HASH_SIPHASH &&
++          !ext4_has_feature_casefold(sb)) {
++              ext4_msg(sb, KERN_ERR,
++                       "Filesystem without casefold feature cannot be "
++                       "mounted with siphash");
++              return 0;
++      }
++
+       if (readonly)
+               return 1;
+ 

diff --git a/queue-6.6/series b/queue-6.6/series
index 5c0a2567abccbed50962022967d85378e46c624e..8d0737e6660b79a12d7766086ecc4140487b5c91 100644 (file)
--- a/queue-6.6/series
+++ b/queue-6.6/series
@@ -728,3 +728,4 @@ mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.p
 mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch
 mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch
 virtio_console-fix-order-of-fields-cols-and-rows.patch
+ext4-filesystems-without-casefold-feature-cannot-be-mounted-with-siphash.patch