# \[iproute PATCH v3 5/6\] netem/maketable: Check return value of fstat()

- From: Phil Sutter \<phil@nwl.cc\>
- Date: 2017-08-21 09:27:48 
- List: netdev
- Page: https://ratatoskr.run/netdev/2017/08/11063516
- Thread: https://ratatoskr.run/netdev/2017/08/11063512/t.md

```text
Otherwise info.st_size may contain garbage.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 netem/maketable.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/netem/maketable.c b/netem/maketable.c
index 6aff927be7040..ad660e7d457f0 100644
--- a/netem/maketable.c
+++ b/netem/maketable.c
@@ -24,8 +24,8 @@ readdoubles(FILE *fp, int *number)
 	int limit;
 	int n=0, i;
 
-	fstat(fileno(fp), &info);
-	if (info.st_size > 0) {
+	if (!fstat(fileno(fp), &info) &&
+	    info.st_size > 0) {
 		limit = 2*info.st_size/sizeof(double);	/* @@ approximate */
 	} else {
 		limit = 10000;
-- 
2.13.1
```