Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-23 Thread Fam Zheng
On 2021-02-23 17:01, Max Reitz wrote: > On 23.02.21 10:21, Fam Zheng wrote: > > On 2021-02-22 18:55, Philippe Mathieu-Daudé wrote: > > > On 2/22/21 6:35 PM, Fam Zheng wrote: > > > > On 2021-02-19 15:09, Philippe Mathieu-Daudé wrote: > > > > > On 2/19/21 12:07 PM, Max Reitz wrote: > > > > > > On

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-23 Thread Max Reitz
On 23.02.21 10:21, Fam Zheng wrote: On 2021-02-22 18:55, Philippe Mathieu-Daudé wrote: On 2/22/21 6:35 PM, Fam Zheng wrote: On 2021-02-19 15:09, Philippe Mathieu-Daudé wrote: On 2/19/21 12:07 PM, Max Reitz wrote: On 13.02.21 22:54, Fam Zheng wrote: On 2021-02-11 15:26, Philippe

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-23 Thread Daniel P . Berrangé
On Tue, Feb 23, 2021 at 09:44:51AM +0100, Max Reitz wrote: > On 22.02.21 19:15, Daniel P. Berrangé wrote: > > On Fri, Feb 19, 2021 at 03:09:43PM +0100, Philippe Mathieu-Daudé wrote: > > > On 2/19/21 12:07 PM, Max Reitz wrote: > > > > On 13.02.21 22:54, Fam Zheng wrote: > > > > > On 2021-02-11

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-23 Thread Fam Zheng
On 2021-02-22 18:55, Philippe Mathieu-Daudé wrote: > On 2/22/21 6:35 PM, Fam Zheng wrote: > > On 2021-02-19 15:09, Philippe Mathieu-Daudé wrote: > >> On 2/19/21 12:07 PM, Max Reitz wrote: > >>> On 13.02.21 22:54, Fam Zheng wrote: > On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: > >

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-23 Thread Max Reitz
On 22.02.21 19:15, Daniel P. Berrangé wrote: On Fri, Feb 19, 2021 at 03:09:43PM +0100, Philippe Mathieu-Daudé wrote: On 2/19/21 12:07 PM, Max Reitz wrote: On 13.02.21 22:54, Fam Zheng wrote: On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: The null-co driver doesn't zeroize buffer in its

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-22 Thread Philippe Mathieu-Daudé
On 2/22/21 7:15 PM, Daniel P. Berrangé wrote: > On Fri, Feb 19, 2021 at 03:09:43PM +0100, Philippe Mathieu-Daudé wrote: >> On 2/19/21 12:07 PM, Max Reitz wrote: >>> On 13.02.21 22:54, Fam Zheng wrote: On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: > The null-co driver doesn't zeroize

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-22 Thread Daniel P . Berrangé
On Fri, Feb 19, 2021 at 03:09:43PM +0100, Philippe Mathieu-Daudé wrote: > On 2/19/21 12:07 PM, Max Reitz wrote: > > On 13.02.21 22:54, Fam Zheng wrote: > >> On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: > >>> The null-co driver doesn't zeroize buffer in its default config, > >>> because it is

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-22 Thread Philippe Mathieu-Daudé
On 2/22/21 6:35 PM, Fam Zheng wrote: > On 2021-02-19 15:09, Philippe Mathieu-Daudé wrote: >> On 2/19/21 12:07 PM, Max Reitz wrote: >>> On 13.02.21 22:54, Fam Zheng wrote: On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: > The null-co driver doesn't zeroize buffer in its default config,

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-22 Thread Fam Zheng
On 2021-02-19 15:09, Philippe Mathieu-Daudé wrote: > On 2/19/21 12:07 PM, Max Reitz wrote: > > On 13.02.21 22:54, Fam Zheng wrote: > >> On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: > >>> The null-co driver doesn't zeroize buffer in its default config, > >>> because it is designed for testing

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-19 Thread Philippe Mathieu-Daudé
On 2/19/21 12:07 PM, Max Reitz wrote: > On 13.02.21 22:54, Fam Zheng wrote: >> On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: >>> The null-co driver doesn't zeroize buffer in its default config, >>> because it is designed for testing and tests want to run fast. >>> However this confuses

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-19 Thread Max Reitz
On 13.02.21 22:54, Fam Zheng wrote: On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: The null-co driver doesn't zeroize buffer in its default config, because it is designed for testing and tests want to run fast. However this confuses security researchers (access to uninit buffers). I'm a

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-13 Thread Fam Zheng
On 2021-02-11 15:26, Philippe Mathieu-Daudé wrote: > The null-co driver doesn't zeroize buffer in its default config, > because it is designed for testing and tests want to run fast. > However this confuses security researchers (access to uninit > buffers). I'm a little surprised. Is changing

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-12 Thread Philippe Mathieu-Daudé
On 2/11/21 4:42 PM, Alexander Bulekov wrote: > On 210211 1526, Philippe Mathieu-Daudé wrote: >> The null-co driver doesn't zeroize buffer in its default config, >> because it is designed for testing and tests want to run fast. >> However this confuses security researchers (access to uninit >>

Re: [PATCH v2 0/2] block: Use 'read-zeroes=true' mode by default with 'null-co' driver

2021-02-11 Thread Alexander Bulekov
On 210211 1526, Philippe Mathieu-Daudé wrote: > The null-co driver doesn't zeroize buffer in its default config, > because it is designed for testing and tests want to run fast. > However this confuses security researchers (access to uninit > buffers). > Interesting.. Is there an example bug