[dpdk-dev] [PATCH] pci: fix parsing of address without function number

[Thomas Monjalon <thomas@monjalon.net>]

If the last part of the PCI address (function number) is missing,
the parsing was successful, assuming function 0.
The call to strtoul is not returning an error in such a case,
so an explicit check is inserted before.

This bug has always been there in older parsing macros:
	- GET_PCIADDR_FIELD
	- GET_BLACKLIST_FIELD

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

Reported-by: Wisam Jaddo <wisamm@mellanox.com>
Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 lib/librte_pci/rte_pci.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/librte_pci/rte_pci.c b/lib/librte_pci/rte_pci.c
index 530738dbd..f400178bb 100644
--- a/lib/librte_pci/rte_pci.c
+++ b/lib/librte_pci/rte_pci.c
@@ -30,6 +30,10 @@ get_u8_pciaddr_field(const char *in, void *_u8, char dlm)
 	uint8_t *u8 = _u8;
 	char *end;
 
+	/* empty string is an error though strtoul() returns 0 */
+	if (*in == '\0')
+		return NULL;
+
 	errno = 0;
 	val = strtoul(in, &end, 16);
 	if (errno != 0 || end[0] != dlm || val > UINT8_MAX) {
-- 
2.19.0