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-next>] [day] [month] [year] [list]
Date: Thu, 14 Mar 2024 16:36:56 +0300
From: Nikita Kiryushin <kiryushin@...ud.ru>
To: Jan Kara <jack@...e.cz>
Cc: Amir Goldstein <amir73il@...il.com>, Matthew Bobrowski
 <repnop@...gle.com>, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: [PATCH] fanotify: remove unneeded sub-zero check for unsigned value


Unsigned size_t len in copy_fid_info_to_user is checked
for negative value. This check is redundant as it is
always false.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 5e469c830fdb ("fanotify: copy event fid info to user")
Signed-off-by: Nikita Kiryushin <kiryushin@...ud.ru>
---
  fs/notify/fanotify/fanotify_user.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index fbdc63cc10d9..4201723357cf 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -502,7 +502,7 @@ static int copy_fid_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
  	}
  
  	/* Pad with 0's */
-	WARN_ON_ONCE(len < 0 || len >= FANOTIFY_EVENT_ALIGN);
+	WARN_ON_ONCE(len >= FANOTIFY_EVENT_ALIGN);
  	if (len > 0 && clear_user(buf, len))
  		return -EFAULT;
  
-- 
2.34.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ