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(-) -- 2.40.1
