linux-kernel - syz test

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Message-ID: <20250423112029.189032-1-contact@arnaud-lcm.com>
Date: Wed, 23 Apr 2025 13:20:29 +0200
From: Arnaud Lecomte <contact@...aud-lcm.com>
To: syzbot+ac3c79181f6aecc5120c@...kaller.appspotmail.com
Cc: johan.hedberg@...il.com,
	linux-bluetooth@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	luiz.dentz@...il.com,
	marcel@...tmann.org,
	syzkaller-bugs@...glegroups.com
Subject: syz test

#syz test

--- a/net/bluetooth/coredump.c
+++ b/net/bluetooth/coredump.c
@@ -249,6 +249,11 @@ static void hci_devcd_dump(struct hci_dev *hdev)
 
        size = hdev->dump.tail - hdev->dump.head;
 
+       if (size >SKB_MAX_ALLOC) {
+               bt_dev_err(hdev, "Dump too large (%u bytes)", size);
+               return;
+       }
+
        /* Emit a devcoredump with the available data */
        dev_coredumpv(&hdev->dev, hdev->dump.head, size, GFP_KERNEL);

--