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

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

2020-12-19 Thread Qiuhao Li
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 0x881coutl 0xcf8 0x0 outb 0xcfc 0xc3