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

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Subject: Re: KASAN: use-after-free Read in add_uevent_var
From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 5 May 2019 17:44:22 +0900
Cc: airlied@xxxxxxxx, dmitry.torokhov@xxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, hpa@xxxxxxxxx, linux-input@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, mingo@xxxxxxxxxx, patrik.r.jakobsson@xxxxxxxxx, rydberg@xxxxxxxxxxx, tglx@xxxxxxxxxxxxx, wsa@xxxxxxxxxxxxx, x86@xxxxxxxxxx
In-reply-to: <000000000000559435058813dc8d@google.com>
User-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1

This seems to be triggered by "pkg/report: skip printk and other printing functions " on syzbot side.
The fix should be "kobject: Don't trigger kobject_uevent(KOBJ_REMOVE) twice." in linux-next.git.

#syz dup: KASAN: use-after-free Read in string

References:
- KASAN: use-after-free Read in add_uevent_var
  - From: syzbot

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