linux-kernel - Re: [syzbot] Re: [syzbot] [acpi?] KASAN: slab-use-after-free Read in software_node_notify

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Message-ID: <67f7176c.050a0220.258fea.0026.GAE@google.com>
Date: Wed, 09 Apr 2025 17:57:16 -0700
From: syzbot <syzbot+2ff22910687ee0dfd48e@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [acpi?] KASAN: slab-use-after-free Read in software_node_notify_remove

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org.

***

Subject: Re: [syzbot] [acpi?] KASAN: slab-use-after-free Read in software_node_notify_remove
Author: lizhi.xu@...driver.com

no register no remove

#syz test

diff --git a/drivers/base/core.c b/drivers/base/core.c
index d2f9d3a59d6b..a4b9fe99aa28 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2384,7 +2384,8 @@ static void device_platform_notify(struct device *dev)
 
 static void device_platform_notify_remove(struct device *dev)
 {
-	software_node_notify_remove(dev);
+	if (device_is_registered(dev))
+		software_node_notify_remove(dev);
 
 	acpi_device_notify_remove(dev);
 }