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From: Wei Huang <wei.huang@intel.com>
To: dev@dpdk.org, rosen.xu@intel.com, qi.z.zhang@intel.com
Cc: Wei Huang <wei.huang@intel.com>
Subject: [dpdk-dev] [PATCH v1 2/2] raw/ifpga: use trusted buffer to free
Date: Thu, 29 Oct 2020 03:19:26 -0400
Message-ID: <1603955966-29700-3-git-send-email-wei.huang@intel.com> (raw)
In-Reply-To: <1603955966-29700-1-git-send-email-wei.huang@intel.com>

In rte_fpga_do_pr, calling function read() may taints argument buffer
which turn to an untrusted value as argumen of rte_free().

Signed-off-by: Wei Huang <wei.huang@intel.com>
---
 drivers/raw/ifpga/ifpga_rawdev.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/raw/ifpga/ifpga_rawdev.c b/drivers/raw/ifpga/ifpga_rawdev.c
index bf0613e..357f07b 100644
--- a/drivers/raw/ifpga/ifpga_rawdev.c
+++ b/drivers/raw/ifpga/ifpga_rawdev.c
@@ -786,7 +786,7 @@ rte_fpga_do_pr(struct rte_rawdev *rawdev, int port_id,
 	int file_fd;
 	int ret = 0;
 	ssize_t buffer_size;
-	void *buffer;
+	void *buffer, *buf_to_free;
 	u64 pr_error;
 
 	if (!file_name)
@@ -818,6 +818,7 @@ rte_fpga_do_pr(struct rte_rawdev *rawdev, int port_id,
 		ret = -ENOMEM;
 		goto close_fd;
 	}
+	buf_to_free = buffer;
 
 	/*read the raw data*/
 	if (buffer_size != read(file_fd, (void *)buffer, buffer_size)) {
@@ -835,8 +836,8 @@ rte_fpga_do_pr(struct rte_rawdev *rawdev, int port_id,
 	}
 
 free_buffer:
-	if (buffer)
-		rte_free(buffer);
+	if (buf_to_free)
+		rte_free(buf_to_free);
 close_fd:
 	close(file_fd);
 	file_fd = 0;
-- 
2.7.3


      parent reply	other threads:[~2020-10-29  8:20 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-29  7:19 [dpdk-dev] [PATCH v1 0/2] raw/ifpga: Fix coverity defects Wei Huang
2020-10-29  7:19 ` [dpdk-dev] [PATCH v1 1/2] raw/ifpga: terminate string filled by readlink with null Wei Huang
2020-10-29  7:19 ` Wei Huang [this message]

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