linux-kernel - KASAN: use-after-free Read in corrupted (4)

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Message-ID: <000000000000c1925305ac997812@google.com>
Date:   Tue, 11 Aug 2020 05:47:19 -0700
From:   syzbot <syzbot+48135e34de22e3a82c99@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, mingo@...hat.com,
        peterz@...radead.org, syzkaller-bugs@...glegroups.com,
        will@...nel.org
Subject: KASAN: use-after-free Read in corrupted (4)

Hello,

syzbot found the following issue on:

HEAD commit:    d6efb3ac Merge tag 'tty-5.9-rc1' of git://git.kernel.org/p..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=172b6976900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ff87594cecb7e666
dashboard link: https://syzkaller.appspot.com/bug?extid=48135e34de22e3a82c99
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1373613a900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+48135e34de22e3a82c99@...kaller.appspotmail.com

netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x41d0/0x5640 kernel/locking/lockdep.c:4296
Read of size 8 at addr ffff8880936320a0 by task syz-executor.0/6858

CPU: 1 PID: 6858 Comm: syz-executor.0 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 dump_sta

---
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