[PATCH] kselftests: dmabuf-heaps: Ensure the driver name is null-terminated

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Even if a vgem device is configured in, we will skip the import_vgem_fd()
test almost every time.

  TAP version 13
  1..11
  # Testing heap: system
  # =======================================
  # Testing allocation and importing:
  ok 1 # SKIP Could not open vgem -1

The problem is that we use the DRM_IOCTL_VERSION ioctl to query the driver
version information but leave the name field a non-null-terminated string.
Terminate it properly to actually test against the vgem device.

Signed-off-by: Zenghui Yu <yuzenghui@xxxxxxxxxx>
---
 tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
index 5f541522364f..2fcc74998fa9 100644
--- a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
+++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c
@@ -32,6 +32,8 @@ static int check_vgem(int fd)
 	if (ret)
 		return 0;
 
+	name[4] = '\0';
+
 	return !strcmp(name, "vgem");
 }
 
-- 
2.33.0




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