linux-ext4 - [PATCH v2 1/2] ext4: wipe filename upon file deletion

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed,  7 Apr 2021 15:42:01 +0000
From:   Leah Rumancik <leah.rumancik@...il.com>
To:     linux-ext4@...r.kernel.org
Cc:     Leah Rumancik <leah.rumancik@...il.com>
Subject: [PATCH v2 1/2] ext4: wipe filename upon file deletion

Zero out filename and file type fields when file is deleted.

Signed-off-by: Leah Rumancik <leah.rumancik@...il.com>
---
 fs/ext4/namei.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 883e2a7cd4ab..0147c86de99e 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2492,6 +2492,10 @@ int ext4_generic_delete_entry(struct inode *dir,
 			else
 				de->inode = 0;
 			inode_inc_iversion(dir);
+
+			memset(de_del->name, 0, de_del->name_len);
+			memset(&de_del->file_type, 0, sizeof(__u8));
+
 			return 0;
 		}
 		i += ext4_rec_len_from_disk(de->rec_len, blocksize);
-- 
2.31.0.208.g409f899ff0-goog