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* [dpdk-dev] [PATCH v2 0/2] raw/ifpga: fix coverity defects
@ 2020-10-30  7:35 Wei Huang
  2020-10-30  7:35 ` [dpdk-dev] [PATCH v3 1/2] raw/ifpga: terminate string filled by readlink with null Wei Huang
  2020-10-30  7:35 ` [dpdk-dev] [PATCH v3 2/2] raw/ifpga: use trusted buffer to free Wei Huang
  0 siblings, 2 replies; 3+ messages in thread
From: Wei Huang @ 2020-10-30  7:35 UTC (permalink / raw)
  To: dev, rosen.xu, qi.z.zhang; +Cc: stable, Wei Huang

These two patches fix defects found by coverity scan.

Main changes from v3:
- Add coverity issue number

Main changes from v2:
- Fix coding style issue

Wei Huang (2):
  raw/ifpga: terminate string filled by readlink with null
  raw/ifpga: use trusted buffer to free

 drivers/raw/ifpga/ifpga_rawdev.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

-- 
2.7.3


^ permalink raw reply	[flat|nested] 3+ messages in thread

* [dpdk-dev] [PATCH v3 1/2] raw/ifpga: terminate string filled by readlink with null
  2020-10-30  7:35 [dpdk-dev] [PATCH v2 0/2] raw/ifpga: fix coverity defects Wei Huang
@ 2020-10-30  7:35 ` Wei Huang
  2020-10-30  7:35 ` [dpdk-dev] [PATCH v3 2/2] raw/ifpga: use trusted buffer to free Wei Huang
  1 sibling, 0 replies; 3+ messages in thread
From: Wei Huang @ 2020-10-30  7:35 UTC (permalink / raw)
  To: dev, rosen.xu, qi.z.zhang; +Cc: stable, Wei Huang

readlink() does not terminate string, add a null character at the end
of the string if readlink() succeeds.

Coverity issue: 362820
Fixes: 9c006c45d0c5 ("raw/ifpga: scan PCIe BDF device tree")

Signed-off-by: Wei Huang <wei.huang@intel.com>
---
v2: fix coding style issue
v3: add coverity issue number
---
 drivers/raw/ifpga/ifpga_rawdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/raw/ifpga/ifpga_rawdev.c b/drivers/raw/ifpga/ifpga_rawdev.c
index 0385514..f9de167 100644
--- a/drivers/raw/ifpga/ifpga_rawdev.c
+++ b/drivers/raw/ifpga/ifpga_rawdev.c
@@ -230,8 +230,9 @@ static int ifpga_rawdev_fill_info(struct ifpga_rawdev *ifpga_dev,
 	memset(link, 0, sizeof(link));
 	memset(link1, 0, sizeof(link1));
 	ret = readlink(path, link, (sizeof(link)-1));
-	if (ret == -1)
+	if ((ret < 0) || ((unsigned int)ret > (sizeof(link)-1)))
 		return -1;
+	link[ret] = 0;   /* terminate string with null character */
 	strlcpy(link1, link, sizeof(link1));
 	memset(ifpga_dev->parent_bdf, 0, 16);
 	point = strlen(link);
-- 
2.7.3


^ permalink raw reply	[flat|nested] 3+ messages in thread

* [dpdk-dev] [PATCH v3 2/2] raw/ifpga: use trusted buffer to free
  2020-10-30  7:35 [dpdk-dev] [PATCH v2 0/2] raw/ifpga: fix coverity defects Wei Huang
  2020-10-30  7:35 ` [dpdk-dev] [PATCH v3 1/2] raw/ifpga: terminate string filled by readlink with null Wei Huang
@ 2020-10-30  7:35 ` Wei Huang
  1 sibling, 0 replies; 3+ messages in thread
From: Wei Huang @ 2020-10-30  7:35 UTC (permalink / raw)
  To: dev, rosen.xu, qi.z.zhang; +Cc: stable, Wei Huang

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

Coverity issue: 279449
Fixes: ef1e8ede3da5 ("raw/ifpga: add Intel FPGA bus rawdev driver")

Signed-off-by: Wei Huang <wei.huang@intel.com>
---
v2: add fixes information to log
v3: add coverity issue number
---
 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 f9de167..27129b1 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


^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2020-10-30  8:35 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-30  7:35 [dpdk-dev] [PATCH v2 0/2] raw/ifpga: fix coverity defects Wei Huang
2020-10-30  7:35 ` [dpdk-dev] [PATCH v3 1/2] raw/ifpga: terminate string filled by readlink with null Wei Huang
2020-10-30  7:35 ` [dpdk-dev] [PATCH v3 2/2] raw/ifpga: use trusted buffer to free Wei Huang

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