[dpdk-dev] [PATCH] vfio: Fix overflow while assigning vfio BAR region offset and size

[Rahul Lakkireddy]

After the commit-id 90a1633b2 (eal/linux: allow to map BARs with MSI-X tables),
VFIO stopped working. On further debug, found that although BAR region
offset and size from vfio are read as u64, they are truncated when assigned to
uint32_t variables resulting in wrong offset being passed for mmap.

The fix is to use uint64_t for offset and size.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy at chelsio.com>
Signed-off-by: Kumar Sanghvi <kumaras at chelsio.com>
---
 lib/librte_eal/linuxapp/eal/eal_pci_vfio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c b/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c
index 426953a..d0385ff 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_vfio.c
@@ -728,7 +728,7 @@ pci_vfio_map_resource(struct rte_pci_device *dev)
 		struct vfio_region_info reg = { .argsz = sizeof(reg) };
 		void *bar_addr;
 		struct memreg {
-			uint32_t offset, size;
+			uint64_t offset, size;
 		} memreg[2] = {};
 
 		reg.index = i;
@@ -771,7 +771,7 @@ pci_vfio_map_resource(struct rte_pci_device *dev)
 				RTE_LOG(DEBUG, EAL,
 					"Trying to map BAR %d that contains the MSI-X "
 					"table. Trying offsets: "
-					"%04x:%04x, %04x:%04x\n", i,
+					"%04lx:%04lx, %04lx:%04lx\n", i,
 					memreg[0].offset, memreg[0].size,
 					memreg[1].offset, memreg[1].size);
 			}
-- 
2.4.1