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From: Vasileios Almpanis <vasilisalmpanis@gmail.com>
To: syzbot+23ad911c819b923238b7@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: i2c: core: fix debugfs UAF on adapter removal
Date: Wed, 12 Aug 2026 09:27:55 +0200	[thread overview]
Message-ID: <20260812072756.2026495-1-vasilisalmpanis@gmail.com> (raw)
In-Reply-To: <6a6aac38.79190830.3d7c75.0018.GAE@google.com>

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 0131b508c0e2489eac6e121135988f6eeb716f19

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 3ec04787a737..17cf3d225268 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1815,6 +1815,12 @@ void i2c_del_adapter(struct i2c_adapter *adap)
 		return;
 	}
 
+	/*
+	 * This drains any in-flight writers, so all
+	 * clients will be caught by i2c_deregister_clients().
+	 */
+	device_remove_file(&adap->dev, &dev_attr_new_device);
+
 	i2c_acpi_remove_space_handler(adap);
 
 	i2c_deregister_clients(adap);

  parent reply	other threads:[~2026-08-12  7:27 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-30  1:43 [syzbot] [fs?] KASAN: slab-use-after-free Read in lookup_noperm_common syzbot
2026-07-30  7:49 ` Hillf Danton
2026-07-30  9:33   ` syzbot
2026-08-01  0:00 ` syzbot
2026-08-01  8:03 ` Forwarded: [PATCH] i2c: core: fix debugfs UAF on adapter removal syzbot
2026-08-01 10:15 ` syzbot
2026-08-12  7:27 ` Vasileios Almpanis [this message]
2026-08-12  9:08   ` [syzbot] [fs?] KASAN: slab-use-after-free Read in lookup_noperm_common syzbot

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