X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=procprotect.c;h=1c3e8035e01f840e61fe6e1e74742835b3e6ed6e;hb=822cc14ef32049a10016bc8ff31d5f5d3652662f;hp=f8ab6e68236ea18bbbdbe48f1eb11081d3cfc2bb;hpb=a5436ade11545ec8b62879d2b9a46a5238dd6722;p=procprotect.git

diff --git a/procprotect.c b/procprotect.c
index f8ab6e6..1c3e803 100644
--- a/procprotect.c
+++ b/procprotect.c
@@ -91,8 +91,16 @@ static int lookup_fast_entry(struct kretprobe_instance *ri, struct pt_regs *regs
     int ret = -1;
     struct procprotect_ctx *ctx;
     struct nameidata *nd = (struct nameidata *) regs->di;
-    struct dentry *parent = nd->path.dentry;
-    struct inode *pinode = parent->d_inode;
+    struct dentry *parent;
+    struct inode *pinode;
+	
+	if (!nd) return ret;
+	parent = nd->path.dentry;
+
+	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) {	
@@ -132,9 +140,13 @@ static int lookup_slow_entry(struct kretprobe_instance *ri, struct pt_regs *regs
     struct procprotect_ctx *ctx;
     struct nameidata *nd = (struct nameidata *) regs->di;
     struct path *p = (struct path *) regs->si;
+    struct dentry *parent;
+	struct inode *pinode;
 
-    struct dentry *parent = nd->path.dentry;
-    struct inode *pinode = parent->d_inode;
+	if (!nd) return;
+	parent = nd->path.dentry;
+    if (!parent) return;
+	pinode= parent->d_inode;
 
     if (pinode->i_sb->s_magic == PROC_SUPER_MAGIC
             && current->nsproxy->mnt_ns!=init_task.nsproxy->mnt_ns) {