Re: [PATCH 5.4 0/5] CIFS DFS fixes for 5.4

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Rishabh Bhatnagar <risbhat@xxxxxxxxxx> writes:

> We are seeing deadlock in cifs code while updating volume in
> cifs_reconnect. There are few fixes available in stable trees
> already. This series backports some patches back to 5.4 stable.
>
>  __schedule+0x268/0x6e0
>  schedule+0x2f/0xa0
>  schedule_preempt_disabled+0xa/0x10
>  __mutex_lock.isra.7+0x20b/0x470
>  ? dfs_cache_update_vol+0x45/0x2a0 [cifs]
>  dfs_cache_update_vol+0x45/0x2a0 [cifs]
>  cifs_reconnect+0x6f2/0xef0 [cifs]
>  cifs_handle_standard+0x18d/0x1b0 [cifs]
>  cifs_demultiplex_thread+0xa5c/0xc90 [cifs]
>  ? cifs_handle_standard+0x1b0/0x1b0 [cifs]
>
> Paulo Alcantara (SUSE) (5):
>   cifs: Clean up DFS referral cache
>   cifs: Get rid of kstrdup_const()'d paths
>   cifs: Introduce helpers for finding TCP connection
>   cifs: Merge is_path_valid() into get_normalized_path()
>   cifs: Fix potential deadlock when updating vol in cifs_reconnect()
>
>  fs/cifs/dfs_cache.c | 701 +++++++++++++++++++++++---------------------
>  1 file changed, 372 insertions(+), 329 deletions(-)

Looks good, thanks.



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