tree 249253d72c6915fc5523bbb3336a2a932c430245
parent 888e2b03ef56694290e58bd9ac23f8033bf6369f
author Al Viro <viro@zeniv.linux.org.uk> 1528435031 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1528435031 -0400

fix proc_fill_cache() in case of d_alloc_parallel() failure

If d_alloc_parallel() returns ERR_PTR(...), we don't want to dput()
that.  Small reorganization allows to have all error-in-lookup
cases rejoin the main codepath after dput(child), avoiding the
entire problem.

Spotted-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Fixes: 0168b9e38c42 "procfs: switch instantiate_t to d_splice_alias()"
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>