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WARNING: lock held when returning to user space!
4.18.0+ #103 Not tainted
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syz-executor6/13829 is leaving the kernel with locks still held!
1 lock held by syz-executor6/13829:
 #0: 00000000dc9e8aa4 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:363