Re: [PATCH 4/4] fuzz: delay IO until they can't trigger the crash

2020-12-24 Thread Alexander Bulekov
On 201223 0920, Qiuhao Li wrote: > On Tue, 2020-12-22 at 13:30 -0500, Alexander Bulekov wrote: > > On 201222 1922, Qiuhao Li wrote: > > > On Mon, 2020-12-21 at 16:17 -0500, Alexander Bulekov wrote: > > > > On 201220 0256, Qiuhao Li wrote: > > > > > Since programmers usually trigger an IO just befor

Re: [PATCH 4/4] fuzz: delay IO until they can't trigger the crash

2020-12-23 Thread Qiuhao Li
On Tue, 2020-12-22 at 13:30 -0500, Alexander Bulekov wrote: > On 201222 1922, Qiuhao Li wrote: > > On Mon, 2020-12-21 at 16:17 -0500, Alexander Bulekov wrote: > > > On 201220 0256, Qiuhao Li wrote: > > > > Since programmers usually trigger an IO just before they need > > > > it. > > > > Try to > >

Re: [PATCH 4/4] fuzz: delay IO until they can't trigger the crash

2020-12-22 Thread Alexander Bulekov
On 201222 1922, Qiuhao Li wrote: > On Mon, 2020-12-21 at 16:17 -0500, Alexander Bulekov wrote: > > On 201220 0256, Qiuhao Li wrote: > > > Since programmers usually trigger an IO just before they need it. > > > Try to > > > delay some IO instructions may help us better understanding the > > > timing

Re: [PATCH 4/4] fuzz: delay IO until they can't trigger the crash

2020-12-22 Thread Qiuhao Li
On Mon, 2020-12-21 at 16:17 -0500, Alexander Bulekov wrote: > On 201220 0256, Qiuhao Li wrote: > > Since programmers usually trigger an IO just before they need it. > > Try to > > delay some IO instructions may help us better understanding the > > timing > > context when debug. > > > > Tested with

Re: [PATCH 4/4] fuzz: delay IO until they can't trigger the crash

2020-12-21 Thread Alexander Bulekov
On 201220 0256, Qiuhao Li wrote: > Since programmers usually trigger an IO just before they need it. Try to > delay some IO instructions may help us better understanding the timing > context when debug. > > Tested with Bug 1908062. Refined vs. Original result: > > outl 0xcf8 0x881c