Re: [PATCH V5 0/9] null_blk: fix init/exit races and memleaks

[Zizhi Wo <wozizhi@huaweicloud.com>]

friendly ping...

在 2026/7/14 12:17, Zizhi Wo 写道:
> From: Zizhi Wo <wozizhi@huawei.com>
> 
> This series fixes several issues in null_blk around lock initialization,
> memory leaks, concurrent configfs access, and module init/exit.
> 
> No functional changes to patches 1-4, 6, and 8-9.
> 
> See the individual patch descriptions for details.
> 
> Changes since v4:
> - Modified patch 5 to fix the check-and-deref race on dev->zones in
>    zone_cond_store().
> - Simplified the fix in patch 7.
> https://lore.kernel.org/all/20260709100452.3520482-1-wozizhi@huaweicloud.com/
> 
> Changes since v3:
> - Added patch 5 (zones array memleak) and patch 6 (cleanup).
> - Added patch 7 (NULL-ptr-deref on shared tag_set queue shrink).
> - Patch 9: reworked the fix from v3's patch 6 to take the file-scope
>    lock in _store instead of scattering READ_ONCE/WRITE_ONCE.
> https://lore.kernel.org/all/20260708073917.2172392-1-wozizhi@huaweicloud.com/
> 
> Changes since v2:
> - Dropped the lock rename patch; the rename and locking rework will be
>    sent as a separate series (per Damien's suggestion).
> - Patch 3: fixed the tense in the commit message.
> - Patch 4: also update dev->NAME in the "!dev->nullb" path, which was
>    previously lost.
> https://lore.kernel.org/all/20260707025542.1299859-1-wozizhi@huaweicloud.com/
> 
> Changes since v1:
> - Added patches 4-6, and modify the lock name in patch 2.
> https://lore.kernel.org/all/20260706123507.3809871-1-wozizhi@huaweicloud.com/
> 
> Zizhi Wo (9):
>    null_blk: use DEFINE_MUTEX for the file-scope mutex
>    null_blk: register configfs subsystem after creating default devices
>    null_blk: move unregister_blkdev() after destroying dev in null_exit()
>    null_blk: free global tag_set on init error path
>    null_blk: free zones array on device power-off
>    null_blk: clean up null_del_dev() to use cached dev pointer
>    null_blk: reject per-device queue resize for shared tag set
>    null_blk: serialize configfs attribute stores with device setup
>    null_blk: serialize configfs attribute shows with the file-scope lock
> 
>   drivers/block/null_blk/main.c | 93 +++++++++++++++++++++--------------
>   1 file changed, 56 insertions(+), 37 deletions(-)
>