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authorTrond Myklebust <trond.myklebust@primarydata.com>2017-09-09 22:31:28 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2017-09-09 22:36:40 +0300
commit8b77484f2b3d8f1096a2231d513fc589e4857a73 (patch)
treee3da966ad54bc63f5a62d1ded3e17603395e7b0e /fs/nfs/write.c
parent5d2a9d9dac902f438daa1334540398aec6c8dcfa (diff)
downloadlinux-8b77484f2b3d8f1096a2231d513fc589e4857a73.tar.xz
NFS: Don't hold the group lock when calling nfs_release_request()
That can deadlock if this is the last reference since nfs_page_group_destroy() calls nfs_page_group_sync_on_bit(). Note that even if the page was removed from the subpage list, the req->wb_head could still be pointing to the old head. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/write.c')
-rw-r--r--fs/nfs/write.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 121218d4e5ed..36d34a4c86bd 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -532,9 +532,9 @@ try_again:
} else if (WARN_ON_ONCE(subreq->wb_offset < head->wb_offset ||
((subreq->wb_offset + subreq->wb_bytes) >
(head->wb_offset + total_bytes)))) {
+ nfs_page_group_unlock(head);
nfs_unroll_locks(inode, head, subreq);
nfs_unlock_and_release_request(subreq);
- nfs_page_group_unlock(head);
nfs_unlock_and_release_request(head);
return ERR_PTR(-EIO);
}