openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

NFSv4: Don't remove the delegation from the super_list more than once 

Add a check to ensure that we haven't already removed the delegation
from the inode after we take all the relevant locks.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-10-21 14:12:13 -04:00
parent b47e0e478c
commit f9e0cc9c97
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/nfs/delegation.c
View File

@ -298,6 +298,10 @@ nfs_detach_delegation_locked(struct nfs_inode *nfsi,
return NULL;
spin_lock(&delegation->lock);
if (!delegation->inode) {
spin_unlock(&delegation->lock);
return NULL;
}
set_bit(NFS_DELEGATION_RETURNING, &delegation->flags);
list_del_rcu(&delegation->super_list);
delegation->inode = NULL;