Potential use-after-free in ____call_usermodehelper

2013-08-21 Thread Dmitry Vyukov
Hi, I'm working on a memory error detector AddressSanitizer for Linux kernel (https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel), it can detect use-after-free and buffer-overflow errors. Currently the tool is in very early stage and it can contain bugs. Here is one of th

Re: Potential use-after-free in ____call_usermodehelper

2013-08-23 Thread Dmitry Vyukov
On Wed, Aug 21, 2013 at 8:35 PM, Dmitry Vyukov wrote: > Hi, > > I'm working on a memory error detector AddressSanitizer for Linux > kernel > (https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel), > it can detect use-after-free and buffer-overflow errors. Currently the > too

Re: Potential use-after-free in ____call_usermodehelper

2013-09-03 Thread Dmitry Vyukov
Hi, Is anybody reading this? Is it a correct place to post such things? Maybe there is a more appropriate place? I am hitting basically thousands of this use-after-free bug. Here is a more detailed report with line numbers: [ 107.292348] ERROR: AddressSanitizer: heap-use-after-free on address f

Re: Potential use-after-free in ____call_usermodehelper

2013-09-03 Thread Dmitry Vyukov
On Wed, Sep 4, 2013 at 12:27 AM, Dan Aloni wrote: > On Tue, Sep 03, 2013 at 05:49:03PM +0400, Dmitry Vyukov wrote: >> Is anybody reading this? Is it a correct place to post such things? >> Maybe there is a more appropriate place? > > This is the correct place, and people are reading this. However,

Re: Potential use-after-free in ____call_usermodehelper

2013-09-03 Thread Dan Aloni
On Tue, Sep 03, 2013 at 05:49:03PM +0400, Dmitry Vyukov wrote: > Is anybody reading this? Is it a correct place to post such things? > Maybe there is a more appropriate place? This is the correct place, and people are reading this. However, the bug is not an obvious one, and you mentioned that thi

Re: Potential use-after-free in ____call_usermodehelper

2013-09-03 Thread Lucas De Marchi
On Tue, Sep 3, 2013 at 5:49 PM, Dmitry Vyukov wrote: > On Wed, Sep 4, 2013 at 12:27 AM, Dan Aloni wrote: >> On Tue, Sep 03, 2013 at 05:49:03PM +0400, Dmitry Vyukov wrote: >>> Is anybody reading this? Is it a correct place to post such things? >>> Maybe there is a more appropriate place? >> >> Thi

Re: Potential use-after-free in ____call_usermodehelper

2013-09-03 Thread Dan Aloni
On Wed, Sep 04, 2013 at 12:49:58AM +0400, Dmitry Vyukov wrote: > On Wed, Sep 4, 2013 at 12:27 AM, Dan Aloni wrote: > > Your work and contribution is appreciated nonetheless, but your bug > > report needs to pertain closer to the work the core kernel hackers > > are doing. > > What exactly do you