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Thu, 27 Aug 2026 02:23:15 -0700 (PDT) From: Jeffin Philip To: syzbot+d632e93ffcd1452bc61e@syzkaller.appspotmail.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: KASAN: slab-use-after-free Read in roccat_open Date: Thu, 27 Aug 2026 14:53:01 +0530 Message-ID: <20260827092301.19883-1-jeffinphilip14@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <6a8fd9c8.50659fcc.60cd.000e.GAE@google.com> References: <6a8fd9c8.50659fcc.60cd.000e.GAE@google.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test: upstream 903c1cf6dff9 diff --git a/drivers/hid/hid-roccat.c b/drivers/hid/hid-roccat.c index 4f15eb951039..505844890ed3 100644 --- a/drivers/hid/hid-roccat.c +++ b/drivers/hid/hid-roccat.c @@ -236,6 +236,7 @@ static int roccat_release(struct inode *inode, struct file *file) hid_hw_close(device->hid); } else { roccat_free_device(device); + devices[minor] = NULL; } } diff --git a/drivers/hid/hid-roccat.c b/drivers/hid/hid-roccat.c index 505844890ed3..220666bdd13d 100644 --- a/drivers/hid/hid-roccat.c +++ b/drivers/hid/hid-roccat.c @@ -370,8 +370,11 @@ void roccat_disconnect(int minor) mutex_lock(&devices_lock); device = devices[minor]; + if (!device) { + mutex_unlock(&devices_lock); + return; + } mutex_unlock(&devices_lock); - device->exist = 0; /* TODO exist maybe not needed */ device_destroy(device->dev->class, MKDEV(roccat_major, minor));