From: Wei Huang <wei.huang@intel.com>
Date: Wed, 17 Mar 2021 08:21:35 +0000 (-0400)
Subject: raw/ifpga/base: check file length
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=bf95921a01acc341442cb42c4764c05334e4412b;p=dpdk.git

raw/ifpga/base: check file length

In fpga_update_flash(), "smgr->rsu_length" is passed to a
parameter that cannot be negative. So return value of
function "lseek" should be checked before being assigned
to "smgr->rsu_length".

Coverity issue: 367481
Fixes: a05bd1b40bde ("raw/ifpga: add FPGA RSU APIs")

Signed-off-by: Wei Huang <wei.huang@intel.com>
Acked-by: Tianfei Zhang <tianfei.zhang@intel.com>
Acked-by: Rosen Xu <rosen.xu@intel.com>
---

diff --git a/drivers/raw/ifpga/base/ifpga_fme_rsu.c b/drivers/raw/ifpga/base/ifpga_fme_rsu.c
index b5e018d3e7..f147aaa1e8 100644
--- a/drivers/raw/ifpga/base/ifpga_fme_rsu.c
+++ b/drivers/raw/ifpga/base/ifpga_fme_rsu.c
@@ -275,6 +275,7 @@ int fpga_update_flash(struct ifpga_fme_hw *fme, const char *image,
 	struct ifpga_sec_mgr *smgr = NULL;
 	uint32_t rsu_stat = 0;
 	int fd = -1;
+	off_t len = 0;
 	struct sigaction old_sigint_action;
 	struct sigaction sa;
 	time_t start;
@@ -318,9 +319,21 @@ int fpga_update_flash(struct ifpga_fme_hw *fme, const char *image,
 			image, strerror(errno));
 		return -EIO;
 	}
-	smgr->rsu_length = lseek(fd, 0, SEEK_END);
+	len = lseek(fd, 0, SEEK_END);
 	close(fd);
 
+	if (len < 0) {
+		dev_err(smgr,
+			"Failed to get file length of \'%s\' [e:%s]\n",
+			image, strerror(errno));
+		return -EIO;
+	}
+	if (len == 0) {
+		dev_err(smgr, "Length of file \'%s\' is invalid\n", image);
+		return -EINVAL;
+	}
+	smgr->rsu_length = len;
+
 	if (smgr->max10_dev->staging_area_size < smgr->rsu_length) {
 		dev_err(dev, "Size of staging area is small than image length "
 			"[%u<%u]\n", smgr->max10_dev->staging_area_size,