linux-kernel - [PATCH] usb: storage: sddr55: avoid integer overflow

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 for Android: free password hash cracker in your pocket

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

Date:   Fri, 3 Feb 2023 23:18:21 +0300
From:   Karina Yankevich <k.yankevich@....ru>
To:     Alan Stern <stern@...land.harvard.edu>
CC:     Karina Yankevich <k.yankevich@....ru>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>,
        <usb-storage@...ts.one-eyed-alien.net>,
        <linux-kernel@...r.kernel.org>, <lvc-project@...uxtesting.org>
Subject: [PATCH] usb: storage: sddr55: avoid integer overflow

We're possibly losing information by shifting an int.
Fix it by adding the necessary cast.

Found by OMP on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Karina Yankevich <k.yankevich@....ru>
---
 drivers/usb/storage/sddr55.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c
index 15dc25801cdc..4aeff73de147 100644
--- a/drivers/usb/storage/sddr55.c
+++ b/drivers/usb/storage/sddr55.c
@@ -236,7 +236,7 @@ static int sddr55_read_data(struct us_data *us,
 			memset (buffer, 0, len);
 		} else {
 
-			address = (pba << info->blockshift) + page;
+			address = ((unsigned long)pba << info->blockshift) + page;
 
 			command[0] = 0;
 			command[1] = LSB_of(address>>16);
@@ -411,7 +411,7 @@ static int sddr55_write_data(struct us_data *us,
 			command[4] = 0x40;
 		}
 
-		address = (pba << info->blockshift) + page;
+		address = ((unsigned long)pba << info->blockshift) + page;
 
 		command[1] = LSB_of(address>>16);
 		command[2] = LSB_of(address>>8); 
-- 
2.39.1