From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793840714; b=1djQVTi0FKCqXQBMmI8ozN+FObewsmvwMYhcLhWeUn70NhoWSRII0PRvM/8D4DzIDeRa AcUyM6AseL5/hGokCtrpH5d9HmeOZzCESzV7elf7SOZGh7ddD4UA25pqlt8awTTrbvryW yTBWRz0wSlJqRCZ6fJ24wBOPdsUoiWH0dKuMok0H3wTbgP4ThlSiV1Oko9sehIt6rnwOq 5jzNMe2yCHtMSpoZAikHQLa7FgZLihdbKnVGSEmtM1lKKmpEU2ck/wI4PJJRgRJaX/qVI 0jX4xeVwXMhfW6iDik76TqrWCY7ZC6590tRZDjK0Y1+VVcP047TEsghEhObXwVnna/g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793840714; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=6TMe2Ccnv5qjbtBbc8Ely43sy+kQVkJJ/fNbvF1VPYQ=; b=GGgIVctuMCOxl4C9ZX4HyAXAF1MJD9CuJ1U90Y2/iepJkne7Z/x2vU+6Lglz/uL8TpD3 9rBcw3skuG5KibD9gBfgvUnHGDwFwXx+jbX7sjPS7yl9rk4VREPt8hqL9BplTEnI0qbfa n2Z7NcQwiu7DUg5GYhhY6OfKGdz+CgHdBLEfc4UX72LXckcJB9JyAuWZcYVRKcN20b+vW lHIHgUmLLVdU/2vgzNdjBTOlr0M1qf0rBxAxpSSE6gSc+vp21oqETFkXG9t5yyH+NEMGo ybZNaMTuUtw2ELDNb8RoY9/Vdt4+Fweb0JF9OC9iU5ZdhsObR2vot3mw3ShtaKao2Bw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=oHHNdrsv; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D65EA606A333 for ; Thu, 5 Nov 2026 01:05:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=oHHNdrsv Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3FB281F00A02; Thu, 5 Nov 2026 01:05:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793840713; bh=6TMe2Ccnv5qjbtBbc8Ely43sy+kQVkJJ/fNbvF1VPYQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oHHNdrsvp98TUgJ7TqiS6Ro2ABwaAx/wTu4G+7Ij9LOnSz+RfV9OK4CJJDO1Lbzbl xOL9J0PpDFvIqTptqp/TgJi0lHLcbi629XoiaQmYeUG1/+s2+L6TbZDEJ+iBLr9D7W iO33D62K1RJUGTTni7hJIesGEI3yZ9n3A98sbErWmk6AGZ0Vw9MwLLwBj5IYygXOOu S1fnTuvQJy2ecq4xzwerFZLLMYqaCBzhLY5qQjt5fq1m6U53mlzBtYniVFWBff8oTD EA2nu0afHnoXWr+F7vbRx0iVZZfBCxGta7DtFtQEbiXpSElAaOigDp+CQeRs8lVOqQ WKh10J5FRQ8Og== From: Sasha Levin To: stable@vger.kernel.org Cc: Sean Young , Hans Verkuil , Sasha Levin Subject: [PATCH 6.6.y] media: rc: Fix race between bpf(BPG_PROG_ATTACH) and device unregister Date: Wed, 4 Nov 2026 20:05:12 -0500 Message-ID: <20261105010459.1096550-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026110455-abacus-sitting-9c3b@gregkh> References: <2026110455-abacus-sitting-9c3b@gregkh> X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Sean Young [ Upstream commit b3f5daf3222999d3f92f606a4eb5e35ab90fd0e4 ] Mark the device as unregistered before tearing down raw IR/bpf state, so that racing bpf(BPF_PROG_{ATTACH,DETACH,QUERY}) calls cannot slip in between ir_raw_event_unregister() completing and dev->registered being cleared. Fixes: dccc0c3ddf8f ("media: rc: fix race between unregister and urb/irq callbacks") Signed-off-by: Sean Young Cc: stable@vger.kernel.org Acked-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/rc/rc-main.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c index 2eaacfa1e29eb..9ee1ea13550bd 100644 --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -2030,18 +2030,18 @@ void rc_unregister_device(struct rc_dev *dev) if (!dev) return; + mutex_lock(&dev->lock); + dev->registered = false; + if (dev->users && dev->close) + dev->close(dev); + mutex_unlock(&dev->lock); + if (dev->driver_type == RC_DRIVER_IR_RAW) ir_raw_event_unregister(dev); del_timer_sync(&dev->timer_keyup); del_timer_sync(&dev->timer_repeat); - mutex_lock(&dev->lock); - if (dev->users && dev->close) - dev->close(dev); - dev->registered = false; - mutex_unlock(&dev->lock); - rc_free_rx_device(dev); /* -- 2.53.0