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Diffstat (limited to 'fs/nfs/dir.c')
-rw-r--r--fs/nfs/dir.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ea1ceffa1d3a..f7e4a88d5d92 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -2957,12 +2957,14 @@ static u64 nfs_access_login_time(const struct task_struct *task,
const struct cred *cred)
{
const struct task_struct *parent;
+ const struct cred *pcred;
u64 ret;
rcu_read_lock();
for (;;) {
parent = rcu_dereference(task->real_parent);
- if (parent == task || cred_fscmp(parent->cred, cred) != 0)
+ pcred = rcu_dereference(parent->cred);
+ if (parent == task || cred_fscmp(pcred, cred) != 0)
break;
task = parent;
}
@@ -3023,6 +3025,7 @@ static int nfs_access_get_cached_rcu(struct inode *inode, const struct cred *cre
* but do it without locking.
*/
struct nfs_inode *nfsi = NFS_I(inode);
+ u64 login_time = nfs_access_login_time(current, cred);
struct nfs_access_entry *cache;
int err = -ECHILD;
struct list_head *lh;
@@ -3037,6 +3040,8 @@ static int nfs_access_get_cached_rcu(struct inode *inode, const struct cred *cre
cache = NULL;
if (cache == NULL)
goto out;
+ if ((s64)(login_time - cache->timestamp) > 0)
+ goto out;
if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_ACCESS))
goto out;
*mask = cache->mask;