From nobody Mon Nov 25 20:49:19 2024 Received: from smtpbgeu2.qq.com (smtpbgeu2.qq.com [18.194.254.142]) (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 9ADA71B0F17 for ; Thu, 24 Oct 2024 10:05:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=18.194.254.142 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729764341; cv=none; b=HjPqQ+8isAjE976705x5LHK0kSKpX8U19o0xULcBdF47bQ/HXGIyKil+kE/PIpwNbVKMXIEeCd1nXj5U3CiaiLi7BEkJ8V1uqiIVzsEHLfie9ngAnFhd0J115toMfobe46mOiovvqaE+AwZODV3linl9tWpaYEMa1+t8mk6JHRY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729764341; c=relaxed/simple; bh=vGOAPTgDXD6OlKz2rB+nrqQ8L0oc3EuH21gSyRvK0L4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=sxf98c1Y9ZDWLnH/OfiDr2x72UdcIePkv5QI905LUpm5QgSWtaNQnHZctBxn2+JII8pI2KNcORrO0guQq/wtVDlUFCfFRgI++DClyQQH+Q9+5JmTIcHCYGYDP6zUrClMVq/3o06YzdHEutTWgBgI9RiIewm2h3njFSHjR8Fu6F8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com; spf=pass smtp.mailfrom=uniontech.com; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b=RwlezK01; arc=none smtp.client-ip=18.194.254.142 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=uniontech.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b="RwlezK01" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1729764175; bh=f2WjcLcdL8RxAYChxq7AGqhitvjD8aR0+LWo3ujNpsg=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=RwlezK01at79gVAgkgdHZcpoFU99O0+4jfwcI3ydEmTzOd5YrFsHUbWip45v49h67 tUScNSuQiTmx+CkuLsMtkzrYTVd+TN22fysNQJRstR8EsC6/CC8/WCghuo+qvDsiCh 9eqRQBBPpJV7E2GEdZnCppF/7v7kWvHaPMUr6sxI= X-QQ-mid: bizesmtpsz4t1729764148tm3grhm X-QQ-Originating-IP: rByjvMv8Lwr8uaD9lyHKqg7Z8BHgt+KwZ6fTawVtrHw= Received: from localhost.localdomain ( [123.124.208.226]) by bizesmtp.qq.com (ESMTP) with id ; Thu, 24 Oct 2024 18:02:26 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 16089252503859937836 From: goutongchen To: linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Will Deacon , Robin Murphy , Joerg Roedel , Jason Gunthorpe , Rob Clark , Dmitry Baryshkov Cc: goutongchen , =?UTF-8?q?=E8=8B=9F=E6=B5=A9?= Subject: [PATCH] iommu/arm-smmu: Add judgment on the size and granule parameters passed in Date: Thu, 24 Oct 2024 18:02:24 +0800 Message-Id: <20241024100224.62942-1-goutongchen@uniontech.com> X-Mailer: git-send-email 2.20.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtpsz:uniontech.com:qybglogicsvrgz:qybglogicsvrgz8a-0 X-QQ-XMAILINFO: NR+Rloh0s0m6azLDCk6gU+FNOoNthJ/898WIcGUiDC26QAA0Omrbk2Mq /kIJh3QwkpF7VccpUo6rJHykyVyFW6w5thvEhJSdGXGv2GXUVB97xKsvDH5BzX97V2eGWW4 MxyscaBXKtelCVeE88Fom5zUEPV824lNaLsBMXae/mnByx9uoW+QZkb+wOrsXJUgL6IvH4M 1WkMIRf0N6F/EY6qCwTYRiZ4KGR1a82nv8PvqD2ZH2e2XgVhG/czFp7Ar5eQRTG8Q7+hzqM toMOnqrYRo0KBNyVx0Mb7ZIJVnKK05YsNhfnr4zq3oRcBKT3Y1VWRN7WKMQUHRQ/qBMs1mJ 1MDjPjO3V0B/5X34EB9thUsTwGWVpc3N8A3OpQwq936V60X73gSbvnIIoTCg9DggsA3MrWb UAtva2+ZyWcWnlm0tQLVVi0tTaE4HDtoH22rKHSWZtPCR98NFOpbYzFmCn6DE3sRkn403s5 6E/FIyxolas/ysG/TW51UeesgIBA3XLHsbyZDvApNqNE/nh6lU5XUIqQ7oK+g82fa3Vu3W6 yjRtXb6by94fJxcSsE+YxAIn1NN3c97DnA3gbQPYsBTIlQu2k1qnpb6rbtlhSu84Cb/JBjl UjcEt7GSJATT2LIUZ9dsZYcE+dBUPfPPTIHw/A+Wk8xVE3jKSQawTw5wJ86zZ15CT5oj3+r 247hx5ywFRNPf0ZuBCve9IpjRblddkjBtO8aHM/uHTUyefbEqVTjo3ULJokPfUhWfmAibPv 13YsZR1pnLdaxhrc23NvIMpQHBpTNdsuxdFRbd9lp0sVp6P/eXcuc9R1PKwr9a991ye+I8v BJQ/VVSvkv6MPkcEV0d1RjuBjJbBPTIqzh+la7aQGdFztxuPMpYsncZZ+41a3GvRq8N3iml r2F83XV4tzV2V9H/U6nduFlQejhDKAy5MuKLbPFoEusHVnzeJEFdMA+vw7V496pLfcerqA5 glFMbmt358vj2daPmX+2YqeuOHB56CTV4qTOwnZPFRx26rCXwoEzXyJw7GltW2G1q0JKS8t k3+AaKqvqESc2tBU+C X-QQ-XMRINFO: NyFYKkN4Ny6FSmKK/uo/jdU= X-QQ-RECHKSPAM: 0 Content-Type: text/plain; charset="utf-8" In the arm_smmu_tlb_inv_range_s1 and arm_smmu_tlb_inv_range_s2 functions, the size and granule passed in must be judged. It must be ensured that the passed in parameter is not 0 and the size is an integer multiple of the granule, otherwise it will cause an infinite while loop. This was encountered during testing, and was initially triggered by passing in a size value of 0, causing the kernel to crash. [ 8.214378][ T675] xhci_hcd 0000:0b:00.0: new USB bus registered, assig= ned bus number 1 [ 68.246185][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [ 68.246866][ C0] rcu: 0-....: (5999 ticks this GP) idle=3D796c/1/= 0x4000000000000000 softirq=3D161/161 fqs=3D2999 [ 68.247924][ C0] rcu: (t=3D6000 jiffies g=3D-699 q=3D1 ncpus=3D12= 8) [ 68.248452][ C0] CPU: 0 PID: 675 Comm: kworker/0:2 Not tainted 6.6.0-= 25.02.2500.002.uos25.aarch64 #1 [ 68.249237][ C0] Hardware name: Inspur CS5260F /CS5260F = , BIOS 4.0.16 05/31/22 16:53:51 [ 68.250029][ C0] Workqueue: events work_for_cpu_fn [ 68.250497][ C0] pstate: a0000005 (NzCv daif -PAN -UAO -TCO -DIT -SSB= S BTYPE=3D--) [ 68.251188][ C0] pc : arm_smmu_tlb_inv_range_s1+0xf0/0x158 [ 68.251704][ C0] lr : arm_smmu_tlb_inv_walk_s1+0x44/0x68 [ 68.252189][ C0] sp : ffff80008044b780 [ 68.252530][ C0] x29: ffff80008044b780 x28: 0000000000000000 x27: 000= 0000000001000 [ 68.253212][ C0] x26: 0000000000000600 x25: 0000000000000001 x24: 000= 0000000000600 [ 68.253857][ C0] x23: 0000000000000000 x22: 0000000000001000 x21: fff= ffc64e2e59000 [ 68.254544][ C0] x20: 0000000039c1d1a6 x19: ffff3fe944c40280 x18: 000= 0000000000000 [ 68.255240][ C0] x17: 626d756e20737562 x16: ffffb0e7e08c1008 x15: 000= 0000000000000 [ 68.255930][ C0] x14: ffff3ef8c1ea15cd x13: ffff3ef8c1ea15cb x12: fff= ffcfba30e3880 [ 68.256538][ C0] x11: 00000000ffff7fff x10: ffff80008044b6b0 x9 : fff= fb0e7decd1b5c [ 68.257126][ C0] x8 : 0000000000000dc0 x7 : ffff3ee8c4148000 x6 : fff= f3ee8c4148000 [ 68.257822][ C0] x5 : 0000000000000008 x4 : 0000000000000000 x3 : fff= f3fe944c40800 [ 68.258497][ C0] x2 : 0000000000000010 x1 : 0000000000000020 x0 : fff= fb0e7dfd6c3d0 [ 68.259185][ C0] Call trace: [ 68.259451][ C0] arm_smmu_tlb_inv_range_s1+0xf0/0x158 [ 68.259933][ C0] arm_smmu_tlb_inv_walk_s1+0x44/0x68 [ 68.260384][ C0] __arm_lpae_map+0x1f0/0x2c0 [ 68.260796][ C0] arm_lpae_map_pages+0xec/0x150 [ 68.261215][ C0] arm_smmu_map_pages+0x48/0x130 [ 68.261654][ C0] __iommu_map+0x134/0x2a8 [ 68.262098][ C0] iommu_map_sg+0xb8/0x1c8 [ 68.262500][ C0] __iommu_dma_alloc_noncontiguous.constprop.0+0x180/0= x270 [ 68.263145][ C0] iommu_dma_alloc+0x178/0x238 [ 68.263557][ C0] dma_alloc_attrs+0xf8/0x108 [ 68.263962][ C0] xhci_mem_init+0x1e8/0x6d0 [ 68.264372][ C0] xhci_init+0x88/0x1d0 [ 68.264736][ C0] xhci_gen_setup+0x284/0x468 [ 68.265121][ C0] xhci_pci_setup+0x60/0x1f8 [ 68.265506][ C0] usb_add_hcd+0x278/0x650 [ 68.265860][ C0] usb_hcd_pci_probe+0x218/0x458 [ 68.266256][ C0] xhci_pci_probe+0x7c/0x270 [ 68.266660][ C0] local_pci_probe+0x48/0xb8 [ 68.267074][ C0] work_for_cpu_fn+0x24/0x40 [ 68.267548][ C0] process_one_work+0x170/0x3c0 [ 68.267999][ C0] worker_thread+0x234/0x3b8 [ 68.268383][ C0] kthread+0xf0/0x108 [ 68.268704][ C0] ret_from_fork+0x10/0x20 Signed-off-by: goutongchen --- drivers/iommu/arm/arm-smmu/arm-smmu.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-= smmu/arm-smmu.c index 8321962b3714..16b2e9ec0e60 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -282,6 +282,13 @@ static void arm_smmu_tlb_inv_range_s1(unsigned long io= va, size_t size, struct arm_smmu_cfg *cfg =3D &smmu_domain->cfg; int idx =3D cfg->cbndx; =20 + if (size =3D=3D 0 || granule =3D=3D 0 || (size % granule) !=3D 0) { + dev_err(smmu->dev, + "The size or granule passed in is err. size=3D%lu, granule=3D%lu\n", + size, granule); + return; + } + if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) wmb(); =20 @@ -309,6 +316,13 @@ static void arm_smmu_tlb_inv_range_s2(unsigned long io= va, size_t size, struct arm_smmu_device *smmu =3D smmu_domain->smmu; int idx =3D smmu_domain->cfg.cbndx; =20 + if (size =3D=3D 0 || granule =3D=3D 0 || (size % granule) !=3D 0) { + dev_err(smmu->dev, + "The size or granule passed in is err. size=3D%lu, granule=3D%lu\n", + size, granule); + return; + } + if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) wmb(); =20 --=20 2.20.1