Guarded against some hypothetically possible errors

[procprotect.git] / procprotect.c

diff --git a/procprotect.c b/procprotect.c
index 741a799..1c3e803 100644 (file)
--- a/procprotect.c
+++ b/procprotect.c
@@ -94,12 +94,14 @@ static int lookup_fast_entry(struct kretprobe_instance *ri, struct pt_regs *regs
     struct dentry *parent;
     struct inode *pinode;
        
-       if (!nd) return;
+       if (!nd) return ret;
        parent = nd->path.dentry;
 
-       if (!parent) return;
+       if (!parent) return ret;
        pinode = parent->d_inode;
 
+       if (!pinode || !pinode->i_sb || !current || !current->nsproxy) return ret;
+
     if (pinode->i_sb->s_magic == PROC_SUPER_MAGIC
             && current->nsproxy->mnt_ns!=init_task.nsproxy->mnt_ns) {  
         ctx = (struct procprotect_ctx *) ri->data;