Re: [PATCH 6.1] ext4: fix uninitialized ratelimit_state->lock access in __ext4_fill_super()

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

The upstream commit SHA1 provided is correct: b4b4fda34e535756f9e774fb2d09c4537b7dfd1c

WARNING: Author mismatch between patch and upstream commit:
Backport author: bin.lan.cn@eng.windriver.com
Commit author: Baokun Li <libaokun1@huawei.com>


Status in newer kernel trees:
6.12.y | Present (exact SHA1)
6.6.y | Present (different SHA1: 23afcd52af06)
6.1.y | Not found

Note: The patch differs from the upstream commit:
---
1:  b4b4fda34e535 ! 1:  5f07a4e2bb575 ext4: fix uninitialized ratelimit_state->lock access in __ext4_fill_super()
    @@ Metadata
      ## Commit message ##
         ext4: fix uninitialized ratelimit_state->lock access in __ext4_fill_super()
     
    +    [ Upstream commit b4b4fda34e535756f9e774fb2d09c4537b7dfd1c ]
    +
         In the following concurrency we will access the uninitialized rs->lock:
     
         ext4_fill_super
    @@ Commit message
         Reviewed-by: Jan Kara <jack@suse.cz>
         Link: https://lore.kernel.org/r/20240102133730.1098120-1-libaokun1@huawei.com
         Signed-off-by: Theodore Ts'o <tytso@mit.edu>
    +    [ Resolve merge conflicts ]
    +    Signed-off-by: Bin Lan <bin.lan.cn@windriver.com>
     
      ## fs/ext4/super.c ##
     @@ fs/ext4/super.c: static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
    @@ fs/ext4/super.c: static int __ext4_fill_super(struct fs_context *fc, struct supe
      
     -failed_mount10:
     +failed_mount9:
    - 	ext4_quotas_off(sb, EXT4_MAXQUOTAS);
    + 	ext4_quota_off_umount(sb);
     -failed_mount9: __maybe_unused
     +failed_mount8: __maybe_unused
      	ext4_release_orphan_info(sb);
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.1.y        |  Success    |  Success   |