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 6215536B059; Tue, 10 Mar 2026 22:26:35 +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=1773181595; cv=none; b=mbra+PHpKH59RiAAUVmRN0HXNCq/YLoF+TTCcTNUha6LQayQ2/2F8JC/htDj/J1ycBTpWLN8uFg72yqLesnH6xbqFGF4/RrQC62Ny/Pgo0NmJqI0L9y+h9heHETKStLzIXodCKOi49+P1VX6Dw3GHvXAqQbfgXZMqfyuZ1T+icY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773181595; c=relaxed/simple; bh=MiJVL62qsCyYZ8Q9hg91dFKxbXDSYJtJCUMeT8RSe5o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ZzltQDOc+47yBPp0UPHlO4i4FKpoaSqmmNkaeaCq7fGV62QgBj/UT60LKHRQJ4KJuS+AFPzUKqOrzuWo62c7UAPa3BxDf75geRITydfZqPiUgTuZoEZANJea6V7XcwAERW2lTJrWOeNyB8zcvoJTpb2UxeNYLgIsouekBdCwpsM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tMy2nOqh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="tMy2nOqh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6F8FBC19423; Tue, 10 Mar 2026 22:26:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773181595; bh=MiJVL62qsCyYZ8Q9hg91dFKxbXDSYJtJCUMeT8RSe5o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tMy2nOqh+lVisv69GNVkSEJt9g1Qr03MTTHGiOse6QUzZ53kMuiZ9S3G/hr+PrjWV WXXccBj9JrPQmy+65UMvGxFAzUZGCzx+HL+lsh9m3ng4XtJEjlbzkcehgnVDGbr2jf H7401RW21twx1DfnOyOgWcLmrhAwXMDz+aPc0CjPkfj0bQd1FAXpGtXdwVCf7MXT2W qK+qK1HU5qRHWQyisgFCoJkoMB443UUFJwY0t765rBOzGtuwhhRck7uNrNws1O+Ezh /MPIXuSi4KPVpBWwO5VDi42YtNab2U1otLRJr4Smmely+UMIFs/EU8EnVUrIQv+lhO Xb0W5tD+XouiA== Date: Tue, 10 Mar 2026 23:26:32 +0100 From: Frederic Weisbecker To: Christian Brauner Cc: Linus Torvalds , linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org, linux-nfs@vger.kernel.org, bpf@vger.kernel.org, kunit-dev@googlegroups.com, linux-doc@vger.kernel.org, linux-trace-kernel@vger.kernel.org, netfs@lists.linux.dev, io-uring@vger.kernel.org, audit@vger.kernel.org, rcu@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux.dev, netdev@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, Christian Loehle , linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v2 1/2] kthread: remove kthread_exit() Message-ID: References: <20260310-work-kernel-exit-v2-0-30711759d87b@kernel.org> <20260310-work-kernel-exit-v2-1-30711759d87b@kernel.org> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260310-work-kernel-exit-v2-1-30711759d87b@kernel.org> Le Tue, Mar 10, 2026 at 03:56:09PM +0100, Christian Brauner a écrit : > In 28aaa9c39945 ("kthread: consolidate kthread exit paths to prevent use-after-free") > we folded kthread_exit() into do_exit() when we fixed a nasty UAF bug. > We left kthread_exit() around as an alias to do_exit(). Remove it > completely. Thanks for fixing that UAF! I unfortunately missed it. > > Reported-by: Christian Loehle > Link: https://lore.kernel.org/1ff1bce2-8bb4-463c-a631-16e14f4ea7e2@arm.com > Signed-off-by: Christian Brauner Reviewed-by: Frederic Weisbecker -- Frederic Weisbecker SUSE Labs