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Subject[PATCH linu-next] samples/bpf: use absolute path for dd
Date
From: Xu Panda <xu.panda@zte.com.cn>

Not using absolute path when invoking dd can lead to serious security
issues.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Xu Panda <xu.panda@zte.com.cn>
---
samples/bpf/trace_event_user.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c
index 9664749bf618..d841918accc9 100644
--- a/samples/bpf/trace_event_user.c
+++ b/samples/bpf/trace_event_user.c
@@ -126,7 +126,7 @@ static void print_stacks(void)

static inline int generate_load(void)
{
- if (system("dd if=/dev/zero of=/dev/null count=5000k status=none") < 0) {
+ if (system("/usr/bin/dd if=/dev/zero of=/dev/null count=5000k status=none") < 0) {
printf("failed to generate some load with dd: %s\n", strerror(errno));
return -1;
}
--
2.15.2
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