From nobody Sun Jul 26 00:54:07 2026 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4DF0D20C00C for ; Fri, 10 Jul 2026 19:33:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783711991; cv=none; b=jMWHEjsdOBQJHtTeHxmFCi1zTeH3kef1g+GENySy3COzszclyWEuddG2q8k93Ow1Byo7LgV7rFoG0Zv7xpm+MKRupgwMREUgqndFI68bU55Isn2k+ijRGzQgG+z8deFhYk+XaZLJdAvnmXTkgAl0/Vb/W6UYdNFqMwhVhXlGCyY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783711991; c=relaxed/simple; bh=lbV3sJ/85dO8wq2/UpU64tsZQkIPnBNx1RuUmpYOFzg=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=BrF0WZkTJrIN3WT1zv+FYbRQ2lWvhN7XlaroimUtWzviPapwRXC0gvFoctg6pdgNtd3ydKQdYAgN41Gg1eX8tSuRvAMdi+DNyXZKH56Q9b4t49sKXvkxsQ68zvRZY1j8RF3LnoLGMT2aHyTgVEV/yFWgxqmVThsakrUu15v8N+Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--rkaruna.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=NxEb3iUb; arc=none smtp.client-ip=209.85.216.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--rkaruna.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="NxEb3iUb" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-384419c6c74so1883437a91.1 for ; Fri, 10 Jul 2026 12:33:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1783711990; x=1784316790; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:mime-version:date:from :to:cc:subject:date:message-id:reply-to:content-type; bh=CcU03WFNoXU4OUw3PgctfeWuJo6VWxELKV1T8zyFLTc=; b=NxEb3iUbHILJVsuZncDnXgoWYQZQvb11LORmoVlG96ymy69diYkspQ/irlsw8aFFW0 ikU7QGuNFvQU439c1ugc3f1fHSx197FE5juhLbOSVe8HrsodZOHzxWBwSKTNTPZVMkHP t81t1jFyLOTZDd3ZqyDFhMicCGycoGkgBL+6LU8Q/vAn1iobCgElwpZ0jYZ7wEZA1fdy GUg9riVj8MUYsOX/Qjuq/PmhfnP7tw/ULjH1eE5bgcsy0UCd8hbr9wk/QXdm7oI6lIb+ lv+PPLyTR5fzype1U/75wtV6U2yui93DSYDGqH8jiTR8cunP2WwryTBqiKh5jPUNcK2c nfWQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783711990; x=1784316790; h=content-type:cc:to:from:subject:message-id:mime-version:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=CcU03WFNoXU4OUw3PgctfeWuJo6VWxELKV1T8zyFLTc=; b=fole23OP1KFrv/7ZSFEqOPfLCJIxtpTS6xZLw9cxgoCMeR8CFxMF7r5t0ZiFPfjSm6 HCn2L5j/RvZuOPNJf/GcSja4C1wdobJPNWf+L0lSlPUOdJnfNi1QttUxWFU4zLuXngaE xSNLgeQOVSYC3GGI14Y+kN/ZgUa6mOdFQRBvTN5WXco6JrrY4rzv0RguDLe9/D3JylaZ F9zDCpQSUnuEc87EhqViPLUQKnRsJOHqnsrpHkBXkeezEFBNlKv23PjXIzyzr5sthGTp knD0Mpv6fmpXRs3D3M5HrtTiU/Mat63HyrDQgBIOl7Z/IFeNyk3vxVS9oxODkgxii4X/ ANaQ== X-Forwarded-Encrypted: i=1; AHgh+RriRaW/5fUW0qlQ+RsyRVAgvMHXeS/XX8+rdHSs8vqId7NH2FTDwX9Qs04rUeGyAwcqIHZXRPbt6SFKrNk=@vger.kernel.org X-Gm-Message-State: AOJu0YzVR6F1dcMBcj3Q0fdhmxeLdfEETxUAt3E7dUmEBfUTsDg40/7D 1TCBliKDvrDg7VqzUnMMNBMuoIdSoroAV9vJMQnV1cQCUncCctMWcB1ntl7oHhfFgLcSK2zQx20 876mvZwDA9Q== X-Received: from dycmx8.prod.google.com ([2002:a05:693c:2888:b0:30f:45f6:de06]) (user=rkaruna job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:560f:b0:37f:c22a:c188 with SMTP id 98e67ed59e1d1-38dc74c2803mr330801a91.4.1783711989618; Fri, 10 Jul 2026 12:33:09 -0700 (PDT) Date: Fri, 10 Jul 2026 19:32:35 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.795.g602f6c329a-goog Message-ID: <20260710193235.334782-1-rkaruna@google.com> Subject: [PATCH] ata: libata-scsi: add out-of-bounds checks in ata_scsiop_inq_b9 From: Karuna Ramkumar To: Damien Le Moal , Niklas Cassel Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, ipylypiv@google.com, tadamsjr@google.com, Karuna Ramkumar Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The function ata_scsiop_inq_b9() currently attempts to write 64 + nr_cpr * 32 number of bytes. If nr_cpr crosses 62, this can cause a buffer overflow since rbuf is 2048 bytes (ATA_SCSI_RBUF_SIZE) in size. Fix this by adding bounds check before writing to rbuf. If the total bytes are greater than ATA_SCSI_RBUF_SIZE, then fail the command with ABORTED_COMMAND error and exit the function. Tested this flow by modifying nr_cpr and confirming that the function exits early, avoiding performing an out-of-bounds write. Fixes: fe22e1c2f705 ("libata: support concurrent positioning ranges log") Link: https://lore.kernel.org/all/0E78BE5F-B4EE-460A-A6D5-F0CE47BFC7DF@kern= el.org/ Assisted-by: Antigravity:gemini-3.5-flash Signed-off-by: Karuna Ramkumar --- drivers/ata/libata-scsi.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 5868526301a2..6f54e23a586c 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2361,15 +2361,22 @@ static unsigned int ata_scsiop_inq_b9(struct ata_de= vice *dev, struct ata_cpr_log *cpr_log =3D dev->cpr_log; u8 *desc =3D &rbuf[64]; int i; + int page_len; =20 if (!cpr_log) { ata_scsi_set_invalid_field(dev, cmd, 2, 0xff); return 0; } =20 + page_len =3D 64 + (int)cpr_log->nr_cpr * 32; + if (page_len > ATA_SCSI_RBUF_SIZE) { + ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0); + return 0; + } + /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */ rbuf[1] =3D 0xb9; - put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]); + put_unaligned_be16(page_len - 4, &rbuf[2]); =20 for (i =3D 0; i < cpr_log->nr_cpr; i++, desc +=3D 32) { desc[0] =3D cpr_log->cpr[i].num; --=20 2.55.0.795.g602f6c329a-goog