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From: Hashim Aziz <hashaziz@hotmail.com>
To: cygwin <cygwin@cygwin.com>
Subject: DD bug fails to wipe last 48 sectors of a disk
Date: Fri, 19 Jun 2020 18:19:28 +0000	[thread overview]
Message-ID: <DB7PR01MB5193A18F1D947ED4C276CD25D5980@DB7PR01MB5193.eurprd01.prod.exchangelabs.com> (raw)

I first came across this bug last year, and wrote up my findings in a detailed answer to the StackExchange network:

https://superuser.com/questions/1505715/why-does-dd-give-me-an-error-at-the-end-of-zero-writing-a-disk

I didn’t then have the time to report it to this mailing list, but have just tested it using the latest version of Cygwin on the same two disks as I did then, and can confirm that the problem still persists. It’s also of note that I was running Windows 7 back then and am currently running 10, so this is now confirmed to manifest on both of the last two Windows OSes. I’m happy to work with the team to get this fixed, as I frequently need to make use of Cygwin dd to zero out drives for both security and regulatory compliance reasons, and failing to wipe the last 48 sectors of all drives is a pretty significant security risk.

Thanks,
Hashim



             reply	other threads:[~2020-06-19 18:19 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-19 18:19 Hashim Aziz [this message]
     [not found] ` <1d1801d64677$bea56050$3bf020f0$@pdinc.us>
2020-06-20 17:31   ` [cygwin] " Hashim Aziz
2020-06-20 20:26     ` Eliot Moss
2020-06-23 15:28       ` Hashim Aziz
2020-06-23 15:29         ` Eliot Moss
2020-06-23 16:06         ` Nicholas Clark
2020-06-23 19:46           ` Hashim Aziz
2020-06-24 10:21             ` Andrey Repin
2020-06-25 12:08               ` Hashim Aziz
2020-06-25 13:25                 ` Brian Inglis
2020-06-28 14:34               ` Christian Franke
2020-06-28 17:50                 ` Jason Pyeron
2020-06-28 20:28                   ` Brian Inglis
2020-06-23 19:33         ` Brian Inglis
2020-12-29  0:46           ` Hashim Aziz
2020-12-29  2:41             ` Jason Pyeron
2020-12-29 17:54               ` Brian Inglis
2020-12-30  1:35                 ` Jason Pyeron
     [not found]                   ` <DB7PR01MB5193B13815933B913D11DDC2D5D20@DB7PR01MB5193.eurprd01.prod.exchangelabs.com>
2021-01-04 21:08                     ` Jason Pyeron
2020-08-04 22:42 ` Hashim Aziz
2020-09-14 15:44 Hamish McIntyre-Bhatty
2020-09-14 15:55 ` Erik Soderquist

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