From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA6F8277026; Sat, 17 Oct 2026 16:49:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792255764; cv=none; b=mRQMSmnKRvaTb5QN7OgKo6K+d+Da03lEFaeyZeNQANVPK3rD5msHpKCFDa67RvUxTvsyEslHo2EaT7r+XL2osRvg+zAKWB5u9geMJRpLDLMp+c8gPB1m+vNlpo/Z/qyoUJZrHEwbYZunt9BbOVERKijUUlLMSokuokQpHFoElu0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792255764; c=relaxed/simple; bh=M7GrTTF0hKCWu5oQtHGK3sOLG7ydpqsHy4vVV2xEmKg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jbBHZpffzw7azrBb9LuS0bhNyNjzKMc0n7cqbqCtUJr6mejmwKARJ3Z0jwyBB+Wa4/GLdDT+bWeaTtpzVAcojpMillN1NTYill21/FvlTGRvlu1+SsdhZK3W+EXsK82uxFc3vfI6H4Th0FdiSDMnNa2SWglo7OkmaK/DJbx6h+0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=t+7mt1xz; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="t+7mt1xz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC42F1F000C4; Sat, 17 Oct 2026 16:49:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792255762; bh=HKWioMd9R9KbQSYhxl/yP0XOEED9+4kyCorrJo941Qs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=t+7mt1xz5QOMCH/OsTNzmuJBjV1MDt+BVtDQgEea3IGjWj6ARJh0ZDaURZfSe1f+b 75DsvLXkakA2unF1kWmMtklp3PawO7MgeSbsSCAj6Aa0fOnGdeqBxWaYy1nKJjeJew HuOJ1CHxL1SXuWKKez+ORMR1etHlW31sNflxGj+8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Doruk Tan Ozturk , Jiri Kosina , Sasha Levin Subject: [PATCH 6.6 0014/1674] HID: sony: fix UAF of ghl_poke_timer / ghl_urb at driver unbind Date: Sat, 17 Oct 2026 17:38:06 +0200 Message-ID: <20261017160431.507038485@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160431.119607952@linuxfoundation.org> References: <20261017160431.119607952@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Doruk Tan Ozturk [ Upstream commit a26705bd2e2728833e7a538ce91e58a5eeff496a ] For GHL (Guitar Hero Live) dongles, sony_probe() arms a periodic timer: ghl_magic_poke() (the timer callback) submits sc->ghl_urb, and the URB completion ghl_magic_poke_cb() re-arms the timer with mod_timer(). sony_remove() drained the timer with timer_delete_sync() and then freed the URB with usb_free_urb(): timer_delete_sync(&sc->ghl_poke_timer); usb_free_urb(sc->ghl_urb); timer_delete_sync() does not block re-arming, and while the URB is in flight the timer is not pending, so the sync delete is a no-op. A URB completion that runs after the delete re-arms the timer, and usb_free_urb() only drops a reference -- it does not kill an in-flight URB. sc is allocated with devm_kzalloc() and freed once sony_remove() returns, so the re-armed ghl_poke_timer (embedded in sc) then fires on freed memory, a use-after-free from timer softirq. This is a disconnect/rmmod race. Poison the URB first, then shut the timer down, before freeing the URB. usb_poison_urb() kills any in-flight URB and permanently rejects further submissions, so a poke timer that is still pending cannot re-submit the URB from ghl_magic_poke() in the window before timer_shutdown_sync() runs. usb_kill_urb() would not suffice: it only cancels the in-flight URB and leaves it submittable once it returns, so the pending timer could re-submit it and put a fresh URB in flight over the freed sc. timer_shutdown_sync() then drains any last callback and blocks re-arming. The probe error path is unaffected: it is only reached before the timer is armed. Reproduced under KASAN on next-20260710 via dummy_hcd + raw-gadget emulation of the GHL PS4 dongle (VID 0x1430 / PID 0x07bb): hid-sony binds and arms the poke timer, the poke URB is held in flight, the driver is unbound (freeing sc), then the URB is released. The completion re-arms the timer on the freed sc, and the re-armed timer fires ~8 s later: BUG: KASAN: slab-use-after-free in ghl_magic_poke+0x98/0xb0 Read of size 8 at addr ffff88810b02fd50 by task swapper/0/0 ghl_magic_poke+0x98/0xb0 call_timer_fn+0x35/0x2b0 __run_timers+0x69c/0x9a0 run_timer_softirq+0x173/0x2a0 Allocated by task 169: sony_probe Freed by task 338: devres_release_group <- hid_device_remove (sony_remove) Found by 0sec (https://0sec.ai) using automated source analysis. Fixes: cc894ac55360 ("HID: sony: support for ghlive ps3/wii u dongles") Cc: stable@vger.kernel.org Assisted-by: 0sec:multi-model Signed-off-by: Doruk Tan Ozturk Signed-off-by: Jiri Kosina [ changed the old del_timer_sync() call to timer_shutdown_sync() ] Signed-off-by: Sasha Levin --- drivers/hid/hid-sony.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index ebc0aa4e4345f..e4b5d202c6637 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -2166,7 +2166,9 @@ static void sony_remove(struct hid_device *hdev) struct sony_sc *sc = hid_get_drvdata(hdev); if (sc->quirks & (GHL_GUITAR_PS3WIIU | GHL_GUITAR_PS4)) { - del_timer_sync(&sc->ghl_poke_timer); + /* poison, not kill: a pending timer must not re-submit during teardown */ + usb_poison_urb(sc->ghl_urb); + timer_shutdown_sync(&sc->ghl_poke_timer); usb_free_urb(sc->ghl_urb); } -- 2.53.0