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xfstests generic/013 and generic/476 reported WARNING as follows:
WARNING: lock held when returning to user space!
6.1.0-rc5+ #4 Not tainted
------------------------------------------------
fsstress/504233 is leaving the kernel with locks still held!
2 locks held by fsstress/504233:
#0: ffff888054c38850 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at:
lock_two_nondirectories+0xcf/0xf0
#1: ffff8880b8fec750 (&sb->s_type->i_mutex_key#21/4){+.+.}-{3:3}, at:
lock_two_nondirectories+0xb7/0xf0
This will lead to deadlock and hungtask.
Fix this by releasing locks when failed to write out on a file range in
cifs_file_copychunk_range().
Fixes: 3e3761f1ec7d ("smb3: use filemap_write_and_wait_range instead of filemap_write_and_wait")
Cc: stable@vger.kernel.org # 6.0
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5024878477