Gilles Peskine c8a9177110 mbedtls_mpi_sub_abs: fix buffer overflow in error case ...

Fix a buffer overflow in mbedtls_mpi_sub_abs() when calculating
|A| - |B| where |B| is larger than |A| and has more limbs (so the
function should return MBEDTLS_ERR_MPI_NEGATIVE_VALUE).

Fix #4042

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

2021-02-01 17:28:03 +01:00

77 KiB

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