lib: fix uninitialized memory access on handling %J string formats

When parsing the padding size specification of a `J` format, e.g. `%.4J`,
the internally called `atoi()` function might read beyond the end of the
initialized memory within the format buffer, leading to non-deterministic
results.

Avoid overreading the initialized memory by parsing the padding length
manually digit-by-digit.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

0 files changed, 0 insertions, 0 deletions