VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: Tianjia Zhang <tianjia.zhang@linux.alibaba.com> 2023-06-01 14:42:44 +0800 committer: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2023-07-19 16:36:53 +0200 commit: fd768cc263f3983e7abb40530b3026ada9a37250 parent: d363ac7bd4bb57c3eab458f4c22c0839e1830b34
Commit Summary:
integrity: Fix possible multiple allocation in integrity_inode_get()
Diffstat:
1 file changed, 9 insertions, 6 deletions
diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index c73858e8c6d5..a462df827de2 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -43,12 +43,10 @@ static struct integrity_iint_cache *__integrity_iint_find(struct inode *inode)
 		else if (inode > iint->inode)
 			n = n->rb_right;
 		else
-			break;
+			return iint;
 	}
-	if (!n)
-		return NULL;
 
-	return iint;
+	return NULL;
 }
 
 /*
@@ -113,10 +111,15 @@ struct integrity_iint_cache *integrity_inode_get(struct inode *inode)
 		parent = *p;
 		test_iint = rb_entry(parent, struct integrity_iint_cache,
 				     rb_node);
-		if (inode < test_iint->inode)
+		if (inode < test_iint->inode) {
 			p = &(*p)->rb_left;
-		else
+		} else if (inode > test_iint->inode) {
 			p = &(*p)->rb_right;
+		} else {
+			write_unlock(&integrity_iint_lock);
+			kmem_cache_free(iint_cache, iint);
+			return test_iint;
+		}
 	}
 
 	iint->inode = inode;