[PATCH 2/3] proc: change proc_sys_evict_inode() to check inode->i_op

[Oleg Nesterov]

Change proc_sys_evict_inode() to verify that this inode is really
a /proc/sys inode before using ->sysctl.

---
 fs/proc/proc_sysctl.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 2fa67e7..863aaee 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -268,6 +268,10 @@ void proc_sys_evict_inode(struct inode *inode)
 {
 	struct ctl_table_header *head;
 
+	if (inode->i_op != &proc_sys_inode_operations &&
+	    inode->i_op != &proc_sys_dir_operations)
+		return;
+
 	head = PROC_I(inode)->sysctl;
 	if (head) {
 		RCU_INIT_POINTER(PROC_I(inode)->sysctl, NULL);
-- 
1.5.5.1