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| author | NeilBrown <neilb@suse.de> | 2014-09-11 16:19:37 +1000 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-09-12 13:10:53 -0400 |
| commit | f39c01047994e66e7f3d89ddb4c6141f23349d8d (patch) | |
| tree | f529a1bcb1a4c63d0396049e9444859dd3424fde /mm | |
| parent | 224ecbf5a674ec7da3a3b3ea21ca62e2853653fa (diff) | |
| download | linux-f39c01047994e66e7f3d89ddb4c6141f23349d8d.tar.bz2 | |
NFS: remove BUG possibility in nfs4_open_and_get_state
commit 4fa2c54b5198d09607a534e2fd436581064587ed
NFS: nfs4_do_open should add negative results to the dcache.
used "d_drop(); d_add();" to ensure that a dentry was hashed
as a negative cached entry.
This is not safe if the dentry has an non-NULL ->d_inode.
It will trigger a BUG_ON in d_instantiate().
In that case, d_delete() is needed.
Also, only d_add if the dentry is currently unhashed, it seems
pointless removed and re-adding it unchanged.
Reported-by: Christoph Hellwig <hch@infradead.org>
Fixes: 4fa2c54b5198d09607a534e2fd436581064587ed
Cc: Jeff Layton <jeff.layton@primarydata.com>
Link: http://lkml.kernel.org/r/20140908144525.GB19811@infradead.org
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions