libubox/tests/cram/test_blob_buflen.t

check that blob buffer cannot exceed maximum buffer length:

  $ [ -n "$TEST_BIN_DIR" ] && export PATH="$TEST_BIN_DIR:$PATH"

  $ valgrind --quiet --leak-check=full test-blob-buflen
  SUCCESS: failed to allocate attribute

  $ test-blob-buflen-san
  SUCCESS: failed to allocate attribute
tests: add blob-buffer overflow test The blob buffer has no limitation in place to prevent buflen to exceed maximum size. This commit adds a test to demonstrate how a blob increases past the maximum allowd size of 16MB. It continuously adds chunks of 64KB and with the 255th one blob_add() returns a valid attribute pointer but the blob's buflen does not increase. The test is used to demonstrate the failure, which is fixed with a follow-up commit. Signed-off-by: Zefir Kurtisi <zefir.kurtisi@gmail.com> [adjusted test case for cram usage] Signed-off-by: Petr Štetiar <ynezz@true.cz> 2021-04-23 19:48:00 +02:00			`check that blob buffer cannot exceed maximum buffer length:`

			`$ [ -n "$TEST_BIN_DIR" ] && export PATH="$TEST_BIN_DIR:$PATH"`

			`$ valgrind --quiet --leak-check=full test-blob-buflen`
			`SUCCESS: failed to allocate attribute`

			`$ test-blob-buflen-san`
			`SUCCESS: failed to allocate attribute`