linux-kernel - Re: [syzbot] Re: [syzbot] [fs?] KASAN: slab-use-after-free Read in debugfs_u32

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Message-ID: <676e01e6.050a0220.226966.008e.GAE@google.com>
Date: Thu, 26 Dec 2024 17:24:54 -0800
From: syzbot <syzbot+d59601b9136ebc356300@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [fs?] KASAN: slab-use-after-free Read in debugfs_u32_get

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Subject: Re: [syzbot] [fs?] KASAN: slab-use-after-free Read in debugfs_u32_get
Author: lizhi.xu@...driver.com

#syz test

diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 3e0b61202f0c..01810508ac1e 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -1650,7 +1650,7 @@ static void nsim_dev_reload_destroy(struct nsim_dev *nsim_dev)
 
 	if (devlink_is_reload_failed(devlink))
 		return;
-	debugfs_remove(nsim_dev->take_snapshot);
+	nsim_dev_debugfs_exit(nsim_dev);
 
 	if (nsim_dev_get_vfs(nsim_dev)) {
 		nsim_bus_dev_set_vfs(nsim_dev->nsim_bus_dev, 0);