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=1794061870; b=g25AOhcbLfzXNHo8/0EvRucsZhWr0Sw4Taf5GBjx3Z2R0z2aMWdo1lW7/c87AvRavwDU tIbZPYH38odLRZkn+dJn7fnmXTs/X+B9KiuiOckQwLRFGtiC5gwdpR5qJtbHxLOvrW+88 qHVLlxqOAjFkw2ilUoSSr2zq3ZCsLg2shWVAntuxEG/tgUUL4VdJK15NOHAxO/8p8yZVE mfdgIN2Td0hZjkrn0+RJmStwLcgddha9y9drUzaB3Dz1J84RRWEb6ArYPGlkyrDVG+YQs LhXmbv3xT/ADlZncMHk4/GJYFSrLFPZ+ViiwDomhgfhjpnpexNGLp9mMpRpJ4vbEVvw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794061870; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=/YH2+vlv0GQWOBIvlaM1gpz0YUzJrhXVVMdDwsFhBb4=; b=jNjyLpQR0fb6geC8K8CsbbzCMeyJ2tyGjJrTU8VeFvrx3Gm+nr40p8soX88XNflCpGKt v4qyD+6kNz8P+Bqvq8Ett3t6cFfFzStHqn2Du1zoF3JUab0Qsk9nVfbNt2mDZmnEp7do/ gllqRGa9ewkFR3DQ/XoOMyplCrQXal37FAu/Mw5/TpRkioHkcWU3kVtE6NXOnSupOwFNZ k1F/tHuEGF6zOH1I4KIRVXqaezNpg0+IbYmT5LoB7UCCun0CM2sFz8yvCqIqXdxNBHEiN r8gBlQ0e1flb8CRu7w70nh5sE02aEBUSRSRu3NwyC44X9jpYrWGOs3eXeDbt0e8BuVA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=vBGuTpzW; 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 7CAAC606A32E; Sat, 7 Nov 2026 14:31:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=vBGuTpzW Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A2811F0089F; Sat, 7 Nov 2026 14:31:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794061870; bh=/YH2+vlv0GQWOBIvlaM1gpz0YUzJrhXVVMdDwsFhBb4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=vBGuTpzWkwmB7UfBWJcQtJcyv8AfV+flw5vQfidM5dez19pe+4oWykXbETUPfmB6H zkQ3estl81HpufkBg0IEzSsZY078svLv9ikGukJjJgMJvLmhZIJbya1dxuyarU1vyQ 9kYoHNOEwJ/FEX1Z5NAXB6yTXSanVfI+m3z+1J34= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sean Young , Hans Verkuil , Sasha Levin Subject: [PATCH 6.12 0885/1536] media: rc: Fix race between bpf(BPG_PROG_ATTACH) and device unregister Date: Sat, 7 Nov 2026 08:48:21 -0500 Message-ID: <20261107135022.482465087@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134957.653319350@linuxfoundation.org> References: <20261107134957.653319350@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore 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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ 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 fb52ed2d4ef6b..eb19ee6765dfb 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