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 D5E0D41C2EB; Wed, 4 Feb 2026 14:58:36 +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=1770217116; cv=none; b=Qg3i/ejb+dwueaf76l+1cdKr3wzgR6cCRy0dvIupdk6cEpX1XiihHOZNs36JP5xKyTH/F3J9F7Ps2DvlpPnFjyrGEg4V63+z3nZlnf9HK8zFgfx8Gm8CGmPVFo2yp9PVkUi7u57qu4pUsxYqvd0KK3qlNHGxzyw6FRaBVGW7fuQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770217116; c=relaxed/simple; bh=jEJbnaCcZOB+MnAjQwKLxUtRmt6SG17kWIZG0qpp434=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LYzyL/HYgC38fVWDpno1GuBBljSPfWCQjm7PKWsumUCr/F0CgNunL7exk4b7FFjszKmFXfqZ08EIY8LKSgASfzYsTxHSCC+gUPALleNAlTLGZoakgdF0NS8VWDOwWcbCi0BhUs6Y/8S7c1UxOrgXhfKJX001oCetLCsFGXTyGss= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=o98BoGQj; 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="o98BoGQj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F1718C4CEF7; Wed, 4 Feb 2026 14:58:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770217116; bh=jEJbnaCcZOB+MnAjQwKLxUtRmt6SG17kWIZG0qpp434=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o98BoGQjAzmTrS5oIUQI/KNl146hk+ehIpQlqhDGOif5jwNlbLR3QKyDlAcHmdaal EdRrP5t2jYQqXsZhBBggD8GRIAOwYZYgiGNU5IAfQSEeG32FDbdrgvLvUohChPwkic 55PVTx1q9nIkMHFq0GxJT0K4EwwkME5oeaWd5098= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arnd Bergmann , Thomas Gleixner , Marc Zyngier Subject: [PATCH 5.15 127/206] irqchip/gic-v3-its: Avoid truncating memory addresses Date: Wed, 4 Feb 2026 15:39:18 +0100 Message-ID: <20260204143902.774929570@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260204143858.193781818@linuxfoundation.org> References: <20260204143858.193781818@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arnd Bergmann commit 8d76a7d89c12d08382b66e2f21f20d0627d14859 upstream. On 32-bit machines with CONFIG_ARM_LPAE, it is possible for lowmem allocations to be backed by addresses physical memory above the 32-bit address limit, as found while experimenting with larger VMSPLIT configurations. This caused the qemu virt model to crash in the GICv3 driver, which allocates the 'itt' object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in ZONE_DMA in this configuration, kmalloc() defaults to higher addresses for ZONE_NORMAL, and the ITS driver stores the physical address in a 32-bit 'unsigned long' variable. Change the itt_addr variable to the correct phys_addr_t type instead, along with all other variables in this driver that hold a physical address. The gicv5 driver correctly uses u64 variables, while all other irqchip drivers don't call virt_to_phys or similar interfaces. It's expected that other device drivers have similar issues, but fixing this one is sufficient for booting a virtio based guest. Fixes: cc2d3216f53c ("irqchip: GICv3: ITS command queue") Signed-off-by: Arnd Bergmann Signed-off-by: Thomas Gleixner Reviewed-by: Marc Zyngier Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260119201603.2713066-1-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/irqchip/irq-gic-v3-its.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -609,7 +609,7 @@ static struct its_collection *its_build_ struct its_cmd_block *cmd, struct its_cmd_desc *desc) { - unsigned long itt_addr; + phys_addr_t itt_addr; u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); @@ -780,7 +780,7 @@ static struct its_vpe *its_build_vmapp_c struct its_cmd_desc *desc) { struct its_vpe *vpe = valid_vpe(its, desc->its_vmapp_cmd.vpe); - unsigned long vpt_addr, vconf_addr; + phys_addr_t vpt_addr, vconf_addr; u64 target; bool alloc; @@ -2413,10 +2413,10 @@ retry_baser: baser->psz = psz; tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; - pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", + pr_info("ITS@%pa: allocated %d %s @%llx (%s, esz %d, psz %dK, shr %d)\n", &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), its_base_type_string[type], - (unsigned long)virt_to_phys(base), + (u64)virt_to_phys(base), indirect ? "indirect" : "flat", (int)esz, psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT);