diff options
| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-07-19 10:06:36 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-08-15 11:54:47 -0400 |
| commit | 5b2b5187fa85665f0c47029ecaf49186ec138d9b (patch) | |
| tree | 76778f77607f3229f9e950139857bce9dc856437 /fs/nfs/nfstrace.c | |
| parent | 74a6d4b5ae4ec7e93c72a92decb2f8c16c812416 (diff) | |
| download | op-kernel-dev-5b2b5187fa85665f0c47029ecaf49186ec138d9b.zip op-kernel-dev-5b2b5187fa85665f0c47029ecaf49186ec138d9b.tar.gz | |
NFS: Fix nfs_page_group_destroy() and nfs_lock_and_join_requests() race cases
Since nfs_page_group_destroy() does not take any locks on the requests
to be freed, we need to ensure that we don't inadvertently free the
request in nfs_destroy_unlinked_subrequests() while the last reference
is being released elsewhere.
Do this by:
1) Taking a reference to the request unless it is already being freed
2) Checking (under the page group lock) if PG_TEARDOWN is already set before
freeing an unreferenced request in nfs_destroy_unlinked_subrequests()
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/nfstrace.c')
0 files changed, 0 insertions, 0 deletions
