[dpdk-stable] [PATCH 2/4] bus/pci: fix size of driver name buffer
Andy Green
andy at warmcat.com
Fri May 18 14:16:06 CEST 2018
Variable dri_name is a pointer and it is incorrect to use its
size as the buffer size. Caller knows the buffer size and
it is safer to pass it explicitly.
Fixes: fe5f777b5383 ("bus/pci: replace strncpy by strlcpy")
Cc: stable at dpdk.org
Signed-off-by: Andy Green <andy at warmcat.com>
Reviewed-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
lib/librte_eal/linuxapp/eal/eal_pci.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index 876ba3819..f9fde3f07 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -94,7 +94,8 @@ pci_unbind_kernel_driver(struct rte_pci_device *dev)
}
static int
-pci_get_kernel_driver_by_path(const char *filename, char *dri_name)
+pci_get_kernel_driver_by_path(const char *filename, char *dri_name,
+ size_t len)
{
int count;
char path[PATH_MAX];
@@ -115,7 +116,7 @@ pci_get_kernel_driver_by_path(const char *filename, char *dri_name)
name = strrchr(path, '/');
if (name) {
- strncpy(dri_name, name + 1, strlen(name + 1) + 1);
+ strlcpy(dri_name, name + 1, len);
return 0;
}
@@ -369,7 +370,7 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
/* parse driver */
snprintf(filename, sizeof(filename), "%s/driver", dirname);
- ret = pci_get_kernel_driver_by_path(filename, driver);
+ ret = pci_get_kernel_driver_by_path(filename, driver, sizeof(driver));
if (ret < 0) {
RTE_LOG(ERR, EAL, "Fail to get kernel driver\n");
free(dev);
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