From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-101.freemail.mail.aliyun.com (out30-101.freemail.mail.aliyun.com [115.124.30.101]) (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 7BBDB2853F7 for ; Thu, 11 Dec 2025 03:43:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.101 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765424588; cv=none; b=GtBo2HGrgDvSjPy/n8yOrjoRE5DGa9nxMMoRcmiMj8oZDX2CWY+kmUTff6DUgq1QxKkxBX52EBH6gfANXt7CZS2OnpKXnRQI/aKQsAuiC/kjrHJemyBurwp5yGS926uYlI9Sb0GyJmqphED665lzozgQEUYDtvy2k3VHzvA49Y0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765424588; c=relaxed/simple; bh=7NBoJgh5OkyTPWq0At/G6wa5nFnDrZ8BNnT6Cqb4DS8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=HbGGspFmVtBVnSkCsGTrfpXXpf9c/qVOCODqV4bcB0rtTefkwnAMMDVDtHK1fp1HjZHiFsHCaLSQ4n5BO4pn3NvU7eOvddEl3p1hJ+1oK97WE3Gt4jT7Xz0iwz6EV+DJ5bgrLnEcIZ3xAQ5x7+zKXC9N5RIdscaX+eq6EgjiYOc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=xj3Qz++8; arc=none smtp.client-ip=115.124.30.101 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="xj3Qz++8" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1765424583; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=F0fQz+fKcYw2Lt8N26wFLWnRzzmmTax3KIFNNCIQb+g=; b=xj3Qz++8Rh9hqwYi8On+VUpO43UZTbo/AtlUwZ6rdt/uiy5+R8Xt+e22IKi2aZ7+OjZGi0sW/QkOAQ5DC/hi2mstpXnF0EXqFAN+tf6kqJdNMu/NHYsKwLjzDqxN1UuBkwQMfWbfKzeCLuh5N3wZEFas1s4hR9FQLIyA4ZHalms= Received: from localhost(mailfrom:kanie@linux.alibaba.com fp:SMTPD_---0WuYov8t_1765424261 cluster:ay36) by smtp.aliyun-inc.com; Thu, 11 Dec 2025 11:37:46 +0800 From: Guixin Liu To: Bjorn Helgaas , Andy Shevchenko , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Cc: linux-pci@vger.kernel.org Subject: [PATCH v7 0/2] PCI: Fix crash when access broken rom Date: Thu, 11 Dec 2025 11:37:39 +0800 Message-ID: <20251211033741.53072-1-kanie@linux.alibaba.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit v6 -> v7: - Put all named defines to a separate patch. - Change PCI_ROM_IMAGE_LEN_UNIT_BYTES to PCI_ROM_IMAGE_LEN_UNIT_SZ_512. - Named BIT(7) to PCI_ROM_LAST_IMAGE_INDICATOR_BIT. - Fix all other comments from Ilpo, such as including header files, and aligment fault, Thanks. v5 -> v6: - Convert some magic number to named defines, suggested by Ilpo, thanks. v4 -> v5: - Add Andy Shevchenko's rb tag, thanks. - Change u64 to unsigned long. - Change pci_rom_header_valid() to pci_rom_is_header_valid() and change pci_rom_data_struct_valid() to pci_rom_is_data_struct_valid(). - Change rom_end from rom+size to rom+size-1 for more readble, and also change header_end >= rom_end to header_end > rom_end, same as data structure end. - Change if(!last_image) to if (last_image).. - Use U16_MAX instead of 0xffff. - Split check_add_overflow() from data_len checking. - Remove !!() when reading last_image, and Use BIT(7) instead of 0x80. v3 -> v4: - Use "u64" instead of "uintptr_t". - Invert the if statement to avoid excessive indentation. - Add comment for alignment checking. - Change last_image's type from int to bool. v2 -> v3: - Add pci_rom_header_valid() helper for checking image addr and signature. - Add pci_rom_data_struct_valid() helper for checking data struct add and signature. - Handle overflow issue when adding addr with size. - Handle alignment fault when running on arm64. v1 -> v2: - Fix commit body problems, such as blank line in "Call Trace" both sides, thanks, (Andy Shevchenko). - Remove every step checking, just check the addr is in header or data struct. - Add Suggested-by: Guanghui Feng tag. Guixin Liu (2): PCI: Introduce named defines for pci rom PCI: Check rom header and data structure addr before accessing drivers/pci/rom.c | 130 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 108 insertions(+), 22 deletions(-) -- 2.43.0