On Sun, Feb 02, 2020 at 02:19:18PM +0100, Daniel Vetter wrote: > On Fri, Jan 31, 2020 at 11:28 PM syzbot > <syzbot+0dc4444774d419e916c8@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 39bed42d Merge tag 'for-linus-hmm' of git://git.kernel.org.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=179465bee00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=2646535f8818ae25 > > dashboard link: https://syzkaller.appspot.com/bug?extid=0dc4444774d419e916c8 > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16251279e00000 > > > > The bug was bisected to: > > > > commit 7611750784664db46d0db95631e322aeb263dde7 > > Author: Alex Deucher <alexander.deucher@xxxxxxx> > > Date: Wed Jun 21 16:31:41 2017 +0000 > > > > drm/amdgpu: use kernel is_power_of_2 rather than local version > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11628df1e00000 > > final crash: https://syzkaller.appspot.com/x/report.txt?x=13628df1e00000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=15628df1e00000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > Reported-by: syzbot+0dc4444774d419e916c8@xxxxxxxxxxxxxxxxxxxxxxxxx > > Fixes: 761175078466 ("drm/amdgpu: use kernel is_power_of_2 rather than local version") > > Aside: This bisect line is complete nonsense ... I'm kinda at the > point where I'm assuming that syzbot bisect results are garbage, which > is maybe not what we want. I guess much stricter filtering for noise > is needed, dunno. > -Danile With race conditions the git bisect is often nonsense. regards, dan carpenter
