If from cifs_revalidate_dentry_attr() the SMB2/QUERY_INFO call fails with an error, such as STATUS_SESSION_EXPIRED, causing the session to be reconnected it is possible we will leak -EAGAIN back to the application even for system calls such as stat() where this is not a valid error. Fix this by re-trying the operation from within cifs_revalidate_dentry_attr() if cifs_get_inode_info*() returns -EAGAIN. This fixes stat() and possibly also other system calls that uses cifs_revalidate_dentry*(). Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx> --- fs/cifs/inode.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index b5e6635c578e..cf36dcd9dafd 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -2073,7 +2073,9 @@ int cifs_revalidate_dentry_attr(struct dentry *dentry) struct inode *inode = d_inode(dentry); struct super_block *sb = dentry->d_sb; char *full_path = NULL; + int count = 0; +again: if (inode == NULL) return -ENOENT; @@ -2099,6 +2101,8 @@ int cifs_revalidate_dentry_attr(struct dentry *dentry) else rc = cifs_get_inode_info(&inode, full_path, NULL, sb, xid, NULL); + if (rc == -EAGAIN && count++ < 10) + goto again; out: kfree(full_path); -- 2.13.6
