[dpdk-dev] [PATCH] fbarray: fix uninitialized variable usage

[Anatoly Burakov]

When file truncation fails, the log message attempts to print a path of
file we failed to truncate, but this path was never set to anything and,
what's worse, was uninitialized. Fix it by passing path from the caller.

Fixes: c44d09811b40 ("eal: add shared indexed file-backed array")
Cc: stable at dpdk.org
Coverity ID: 366122

Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
---
 lib/librte_eal/common/eal_common_fbarray.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_fbarray.c b/lib/librte_eal/common/eal_common_fbarray.c
index d974f3dab7..592ec58594 100644
--- a/lib/librte_eal/common/eal_common_fbarray.c
+++ b/lib/librte_eal/common/eal_common_fbarray.c
@@ -81,9 +81,8 @@ get_used_mask(void *data, unsigned int elt_sz, unsigned int len)
 }
 
 static int
-resize_and_map(int fd, void *addr, size_t len)
+resize_and_map(int fd, const char *path, void *addr, size_t len)
 {
-	char path[PATH_MAX];
 	void *map_addr;
 
 	if (eal_file_truncate(fd, len)) {
@@ -792,7 +791,7 @@ rte_fbarray_init(struct rte_fbarray *arr, const char *name, unsigned int len,
 		if (eal_file_lock(fd, EAL_FLOCK_SHARED, EAL_FLOCK_RETURN))
 			goto fail;
 
-		if (resize_and_map(fd, data, mmap_len))
+		if (resize_and_map(fd, path, data, mmap_len))
 			goto fail;
 	}
 	ma->addr = data;
@@ -895,7 +894,7 @@ rte_fbarray_attach(struct rte_fbarray *arr)
 	if (eal_file_lock(fd, EAL_FLOCK_SHARED, EAL_FLOCK_RETURN))
 		goto fail;
 
-	if (resize_and_map(fd, data, mmap_len))
+	if (resize_and_map(fd, path, data, mmap_len))
 		goto fail;
 
 	/* store our new memory area */
-- 
2.25.1