From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 04219313298; Mon, 13 Apr 2026 16:49:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098983; cv=none; b=Vl5oEpaHWsg1QZhVn+JTG/xErw1yrxlQHUBK/AzyqedZc+n2YnGkyX0AssSwrOnmSUzL67rcRejz782z0yRyeqJ3hoBXvSF7x41nw/dbai4bDGzI+cBeR7c4sC6kCjIlB8ed9lQYvK7QvXDNYAtopd0SbjDaBdeFW34klROJrR4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098983; c=relaxed/simple; bh=1EC87uYLW1YIcAsw94SWl81h2e8cORqJ22+j92TcTd0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QCy1/mcogorBfIHU+ygHdHUyGDaG0wotj2T6+OpVYrlMiYIAM7ED7rRlW6Ljo7g2P9cFOAXueKh1WTaqtuw470HGt43ZUrvsNPreumG/YwD263dpD86L2jveDElK4ofjUl0dvhwvfsuNwTdyCLiqfpAJ7kJVAkERt5/7a5Q0PqY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=khkFkCrG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="khkFkCrG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8F177C2BCAF; Mon, 13 Apr 2026 16:49:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776098982; bh=1EC87uYLW1YIcAsw94SWl81h2e8cORqJ22+j92TcTd0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=khkFkCrGnBf7XMb+s3mu/gC8A6oS+HpyuWP7ef93ImcgMXY8oSqnEm22nD37sPMTn +Dht3cwrA7TNXpq7zc2tqJeMu9yiB9y+6DUZ7eEfZdDpe/o7BWp7oYBuBM+I0Wk2CZ VvqYVfQzgTWPN3HIvLHmoJxu/PbOqZASR+SfvBcQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Daniil Dulov , Johannes Berg , Sasha Levin Subject: [PATCH 5.10 164/491] wifi: cfg80211: cancel rfkill_block work in wiphy_unregister() Date: Mon, 13 Apr 2026 17:56:49 +0200 Message-ID: <20260413155825.178972796@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155819.042779211@linuxfoundation.org> References: <20260413155819.042779211@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniil Dulov [ Upstream commit 767d23ade706d5fa51c36168e92a9c5533c351a1 ] There is a use-after-free error in cfg80211_shutdown_all_interfaces found by syzkaller: BUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220 Read of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326 CPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: events cfg80211_rfkill_block_work Call Trace: dump_stack_lvl+0x116/0x1f0 print_report+0xcd/0x630 kasan_report+0xe0/0x110 cfg80211_shutdown_all_interfaces+0x213/0x220 cfg80211_rfkill_block_work+0x1e/0x30 process_one_work+0x9cf/0x1b70 worker_thread+0x6c8/0xf10 kthread+0x3c5/0x780 ret_from_fork+0x56d/0x700 ret_from_fork_asm+0x1a/0x30 The problem arises due to the rfkill_block work is not cancelled when wiphy is being unregistered. In order to fix the issue cancel the corresponding work in wiphy_unregister(). Found by Linux Verification Center (linuxtesting.org) with Syzkaller. Fixes: 1f87f7d3a3b4 ("cfg80211: add rfkill support") Cc: stable@vger.kernel.org Signed-off-by: Daniil Dulov Link: https://patch.msgid.link/20260211082024.1967588-1-d.dulov@aladdin.ru Signed-off-by: Johannes Berg [ Context ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- net/wireless/core.c | 1 + 1 file changed, 1 insertion(+) --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -1046,6 +1046,7 @@ void wiphy_unregister(struct wiphy *wiph rtnl_unlock(); flush_work(&rdev->scan_done_wk); + cancel_work_sync(&rdev->rfkill_block); cancel_work_sync(&rdev->conn_work); flush_work(&rdev->event_work); cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);