[PATCH] ext4: EXT4_I(sbi->s_buddy_cache)->i_state_flags is not initialized

[Jiucheng Xu via B4 Relay]

From: Jiucheng Xu <jiucheng.xu@xxxxxxxxxxx>

The i_state_flags originates from an inode that was previously
destroyed and then allocated to s_buddy_cache; it requires
reinitialization.

The relevant log during umount is shown below:

EXT4-fs (mmcblk0p28): unmounting filesystem xxx-xxx
EXT4-fs (mmcblk0p28): Inode 1 (39878178): inode tracked as orphan!
39878178: 1411f3c7 e0182705 78cc454d ac11f000  .....'..ME.x....
da10433b: 1a2e0146 792e03d0 9c2a04d1 0c788ad3  F......y..*...x.
a91573cf: 44270388 4f4202ea 721a12ea 340cbce0  ..'D..BO...r...4
89cb2f37: 0d13f000 4f270414 1a0b01f0 4f880fe0  ......'O.......O
810e3bc2: 3f0c02f0 482b0009 02e048d0 83f43f2a  ...?..+H.H..*?..
3f37c9f7: 02880aaf 00000000 00000000 00000000  ................

Signed-off-by: Jiucheng Xu <jiucheng.xu@xxxxxxxxxxx>
---
 fs/ext4/mballoc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index dbc82b65f810fed89da7fa7149d3a05de6f107d6..20b07b2bea31ea81ffbd0b4ace3a7b218c8f4dd5 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3521,6 +3521,9 @@ static int ext4_mb_init_backend(struct super_block *sb)
 	sbi->s_buddy_cache->i_ino = EXT4_BAD_INO;
 	EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
 	ext4_set_inode_mapping_order(sbi->s_buddy_cache);
+#if (BITS_PER_LONG < 64)
+	ext4_clear_state_flags(EXT4_I(sbi->s_buddy_cache));
+#endif
 
 	for (i = 0; i < ngroups; i++) {
 		cond_resched();

---
base-commit: 4f5e8e6f012349a107531b02eed5b5ace6181449
change-id: 20260126-origin-dev-9f84135b9555

Best regards,
-- 
Jiucheng Xu <jiucheng.xu@xxxxxxxxxxx>