netdev - [BUG] atm: idt77252: Found a bug when removing the module

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Date:   Sat, 21 May 2022 19:48:06 +0800
From:   Zheyu Ma <zheyuma97@...il.com>
To:     3chas3@...il.com
Cc:     linux-atm-general@...ts.sourceforge.net, netdev@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [BUG] atm: idt77252: Found a bug when removing the module

Hello,

I found a bug in the driver idt77252, when removing the module, I got
the following flaw:

[   14.576507] BUG: KASAN: use-after-free in
idt77252_interrupt+0xfde/0x13c0 [idt77252]
[   14.576980] Read of size 8 at addr ffff88800a428008 by task modprobe/292
[   14.578516] Call Trace:
[   14.580577]  idt77252_interrupt+0xfde/0x13c0 [idt77252]

The bug occurs in line 2770, I guess that the reason is that the
driver free the irq too late.

Zheyu Ma