From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Greg KH <gregkh@linuxfoundation.org>,
syzbot <syzbot+28748250ab47a8f04100@syzkaller.appspotmail.com>,
bvanassche@acm.org, emilne@redhat.com,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
martin.petersen@oracle.com, nogikh@google.com,
syzkaller-bugs@googlegroups.com, tasos@tasossah.com,
usb-storage@lists.one-eyed-alien.net
Subject: Re: [PATCH] USB: usb-storage: Prevent divide-by-0 error in isd200_ata_command
Date: Thu, 29 Feb 2024 20:11:35 -0500 [thread overview]
Message-ID: <yq1frxazrgx.fsf@ca-mkp.ca.oracle.com> (raw)
In-Reply-To: <b1e605ea-333f-4ac0-9511-da04f411763e@rowland.harvard.edu> (Alan Stern's message of "Thu, 29 Feb 2024 14:30:06 -0500")
Alan,
> The isd200 sub-driver in usb-storage uses the HEADS and SECTORS values
> in the ATA ID information to calculate cylinder and head values when
> creating a CDB for READ or WRITE commands. The calculation involves
> division and modulus operations, which will cause a crash if either of
> these values is 0. While this never happens with a genuine device, it
> could happen with a flawed or subversive emulation, as reported by the
> syzbot fuzzer.
Looks good to me.
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2024-03-01 1:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-26 9:42 [syzbot] [usb-storage?] divide error in isd200_ata_command syzbot
2024-02-26 10:59 ` Oliver Neukum
2024-02-26 18:13 ` Alan Stern
2024-02-27 2:46 ` Martin K. Petersen
2024-02-27 3:05 ` Alan Stern
2024-02-28 16:20 ` Oliver Neukum
2024-02-28 19:23 ` Alan Stern
2024-02-27 19:36 ` Alan Stern
2024-02-28 5:20 ` syzbot
2024-02-28 16:12 ` Alan Stern
2024-02-28 16:13 ` syzbot
2024-02-28 16:52 ` Aleksandr Nogikh
2024-02-28 19:18 ` Alan Stern
2024-02-29 0:33 ` syzbot
2024-02-29 19:30 ` [PATCH] USB: usb-storage: Prevent divide-by-0 " Alan Stern
2024-03-01 1:11 ` Martin K. Petersen [this message]
2024-03-01 11:36 ` PrasannaKumar Muralidharan
2024-02-29 15:40 ` [syzbot] [usb-storage?] divide " Aleksandr Nogikh
2024-02-29 16:12 ` Alan Stern
2024-02-29 17:57 ` Aleksandr Nogikh
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