Re: KASAN: use-after-free Read in path_lookupat

[syzbot]

syzbot has bisected this bug to:

commit a435393acafbf0ecff4deb3e3cb554b34f0d0664
Author: Sagi Grimberg <sagi@xxxxxxxxxxx>
Date:   Thu Jul 13 08:09:40 2017 +0000

    mlx5: move affinity hints assignments to generic code

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12df1ba3200000
start commit:   442b8cea Add linux-next specific files for 20181109
git tree:       linux-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=11df1ba3200000
console output: https://syzkaller.appspot.com/x/log.txt?x=16df1ba3200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2f72bdb11df9fbe8
dashboard link: https://syzkaller.appspot.com/bug?extid=7a8ba368b47fdefca61e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=132815f5400000

Reported-by: syzbot+7a8ba368b47fdefca61e@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: a435393acafb ("mlx5: move affinity hints assignments to generic  
code")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection