The Close() macro uses the passed in expression three times, which
leads to repeated execution in case it has side effects. That is,
Close(i--) would decrement i three times.
ASAN caught a stack-buffer-undeflow error at a point where this was
overlooked. Fix it.
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
---
tools/testing/selftests/bpf/prog_tests/fd_array.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/fd_array.c b/tools/testing/selftests/bpf/prog_tests/fd_array.c
index c534b4d5f9da..3078d8264deb 100644
--- a/tools/testing/selftests/bpf/prog_tests/fd_array.c
+++ b/tools/testing/selftests/bpf/prog_tests/fd_array.c
@@ -412,8 +412,8 @@ static void check_fd_array_cnt__fd_array_too_big(void)
ASSERT_EQ(prog_fd, -E2BIG, "prog should have been rejected with -E2BIG");
cleanup_fds:
- while (i > 0)
- Close(extra_fds[--i]);
+ while (i-- > 0)
+ Close(extra_fds[i]);
}
void test_fd_array_cnt(void)
--
2.53.0