From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 018C1C5AD5A for ; Wed, 12 Aug 2026 12:09:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=dXCVFy3Yiy0uZz31vPc+o0EnvztfwFk2wLhWfLPEQy0=; b=pZ73XxFzpbzgFITgHm3YWs4Bci x8qtEbAmvoD8LoZDAIqaWM6tKOLOU1Ncsr29n09Gxza8DnHaYA+LHBhyibGbPvLdGdfrFWqs24GSB /v62+zzl7/QgwNClk9TWMIwRedynUKI12/wDLk+6F8PrScLVGFpV6/RDiCqkjK+tS4Pr4Gk77SV9g H7RTRM1KHzeVVpECo+NAKsTdbFbjq98N4GFipUpM0yP7cRGd17EK/fcUdCDWfdmH8O7/D6PleQjDr FtFlQIkokDU2QThuuWH+gsEeMHUMFKUhu80KqCKvYrhQcpuhk5PYI9p5hT2HzB7E9GYU3lPkH1gNT VIWvcdUw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wu7lh-0000000G9mQ-0wCw; Wed, 12 Aug 2026 12:09:13 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wu7le-0000000G9m3-0ikJ for linux-arm-kernel@lists.infradead.org; Wed, 12 Aug 2026 12:09:10 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id B611142B32; Wed, 12 Aug 2026 12:09:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 174C01F000E9; Wed, 12 Aug 2026 12:09:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786536548; bh=dXCVFy3Yiy0uZz31vPc+o0EnvztfwFk2wLhWfLPEQy0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=FDAkffAB+OU34vurLIkM7zx4W46P8zSgyFFcth1g+LOWUw2hurxz3+MdYFjFueu6A W4ky5lwI5mHIFP4YDBgQtWxrzymuszFwphsvDYbbjTvldRzeS5T4ZX51zGer93RBn9 4s7Dnj+/OZAd9LsVAmvoFc3h9PQNuaMSiFyjIyZg29eqOhyIq9OGTWdq3EJrkCnn27 6jRH2Z5iir4/Ddj0ySN6FNhTxspMp9HcGvlU9rywFB1h7UHN+5q30/q0ma+x8KdEgC FdP/Y3eraKM7ixvqEj3SG9K5fMK67hRG0hiBLDIe0neXeqfCly5Pjp6EWMgq0IZpGk 7Uxew/bKgJSHg== From: Will Deacon To: linux-arm-kernel@lists.infradead.org, Will Deacon Cc: catalin.marinas@arm.com, kernel-team@android.com, linux-kernel@vger.kernel.org, Ard Biesheuvel , Gus Bourg Subject: Re: [PATCH] arm64/efi: Avoid voluntary preemption with efi_mm installed Date: Wed, 12 Aug 2026 13:09:01 +0100 Message-ID: <178653008050.3619485.9655082628156363695.b4-ty@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260811140430.22832-1-will@kernel.org> References: <20260811140430.22832-1-will@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 11 Aug 2026 15:04:29 +0100, Will Deacon wrote: > Gus reports a bad kernel memory access when using software PAN > (CONFIG_ARM64_SW_TTBR0_PAN=y) on a machine with support for EFI runtime > services: > > Unable to handle kernel access to user memory outside uaccess routines > at virtual address 00000000f322ff30 > Mem abort info: > ESR = 0x0000000096000004 > FSC = 0x04: level 0 translation fault > Internal error: Oops: 0000000096000004 [#1] SMP > Workqueue: efi_rts_wq efi_call_rts > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : efi_call_rts+0xd8/0x288 > Call trace: > efi_call_rts+0xd8/0x288 (P) > process_one_work+0x178/0x4f8 > worker_thread+0x194/0x328 > > [...] Applied to arm64 (for-next/mm), thanks! [1/1] arm64/efi: Avoid voluntary preemption with efi_mm installed https://git.kernel.org/arm64/c/e98a9d014637 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev