[dpdk-dev] [PATCH v2 3/6] eal: Fix memory leaks and needless increment of pci_map_addr
Tetsuya Mukawa
mukawa at igel.co.jp
Tue Mar 24 05:18:34 CET 2015
This patch fixes following memory leaks.
- When pci_map_resource() is failed but path is allocated correctly,
path won't be freed in pci_uio_map_recource().
- When open() is failed, uio_res won't be freed in
pci_uio_map_resource().
- When pci_uio_unmap() is called, path should be freed.
Also, fixes below.
- When pci_map_resource() is failed, mapaddr will be MAP_FAILED.
In this case, pci_map_addr should not be incremented in
pci_uio_map_resource().
- To shrink code, move close().
- Remove fail variable.
Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp>
---
lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 35 ++++++++++++++++++-------------
1 file changed, 20 insertions(+), 15 deletions(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
index f0277be..0128cec 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
@@ -333,7 +333,6 @@ pci_uio_map_resource(struct rte_pci_device *dev)
maps = uio_res->maps;
for (i = 0, map_idx = 0; i != PCI_MAX_RESOURCE; i++) {
int fd;
- int fail = 0;
/* skip empty BAR */
phaddr = dev->mem_resource[i].phys_addr;
@@ -347,6 +346,11 @@ pci_uio_map_resource(struct rte_pci_device *dev)
loc->domain, loc->bus, loc->devid, loc->function,
i);
+ /* allocate memory to keep path */
+ maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
+ if (maps[map_idx].path == NULL)
+ goto fail0;
+
/*
* open resource file, to mmap it
*/
@@ -354,7 +358,7 @@ pci_uio_map_resource(struct rte_pci_device *dev)
if (fd < 0) {
RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
devname, strerror(errno));
- return -1;
+ goto fail1;
}
/* try mapping somewhere close to the end of hugepages */
@@ -363,23 +367,13 @@ pci_uio_map_resource(struct rte_pci_device *dev)
mapaddr = pci_map_resource(pci_map_addr, fd, 0,
(size_t)dev->mem_resource[i].len, 0);
+ close(fd);
if (mapaddr == MAP_FAILED)
- fail = 1;
+ goto fail1;
pci_map_addr = RTE_PTR_ADD(mapaddr,
(size_t)dev->mem_resource[i].len);
- maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
- if (maps[map_idx].path == NULL)
- fail = 1;
-
- if (fail) {
- rte_free(uio_res);
- close(fd);
- return -1;
- }
- close(fd);
-
maps[map_idx].phaddr = dev->mem_resource[i].phys_addr;
maps[map_idx].size = dev->mem_resource[i].len;
maps[map_idx].addr = mapaddr;
@@ -394,6 +388,15 @@ pci_uio_map_resource(struct rte_pci_device *dev)
TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
return 0;
+
+fail1:
+ rte_free(maps[map_idx].path);
+fail0:
+ for (i = 0; i < map_idx; i++)
+ rte_free(maps[i].path);
+ rte_free(uio_res);
+
+ return -1;
}
#ifdef RTE_LIBRTE_EAL_HOTPLUG
@@ -405,9 +408,11 @@ pci_uio_unmap(struct mapped_pci_resource *uio_res)
if (uio_res == NULL)
return;
- for (i = 0; i != uio_res->nb_maps; i++)
+ for (i = 0; i != uio_res->nb_maps; i++) {
pci_unmap_resource(uio_res->maps[i].addr,
(size_t)uio_res->maps[i].size);
+ rte_free(uio_res->maps[i].path);
+ }
}
static struct mapped_pci_resource *
--
1.9.1
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