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2023-12-22crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_initTianjia Zhang1-0/+3
When the mpi_ec_ctx structure is initialized, some fields are not cleared, causing a crash when referencing the field when the structure was released. Initially, this issue was ignored because memory for mpi_ec_ctx is allocated with the __GFP_ZERO flag. For example, this error will be triggered when calculating the Za value for SM2 separately. Fixes: d58bb7e55a8a ("lib/mpi: Introduce ec implementation to MPI library") Cc: [email protected] # v6.5 Signed-off-by: Tianjia Zhang <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-08-11crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()Mark O'Donovan1-2/+6
During NVMeTCP Authentication a controller can trigger a kernel oops by specifying the 8192 bit Diffie Hellman group and passing a correctly sized, but zeroed Diffie Hellamn value. mpi_cmp_ui() was detecting this if the second parameter was 0, but 1 is passed from dh_is_pubkey_valid(). This causes the null pointer u->d to be dereferenced towards the end of mpi_cmp_ui() Signed-off-by: Mark O'Donovan <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
2023-08-11crypto: lib - Move mpi into lib/cryptoHerbert Xu26-0/+7298
As lib/mpi is mostly used by crypto code, move it under lib/crypto so that patches touching it get directed to the right mailing list. Signed-off-by: Herbert Xu <[email protected]> Reviewed-by: Mimi Zohar <[email protected]> Signed-off-by: Herbert Xu <[email protected]>