On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().
keyctl_pkey_verify
asymmetric_key_verify_signature
verify_signature
public_key_verify_signature
This patch simply check this situation and fixes the crash
caused by NULL pointer.
Fixes: 2155256396 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Reported-by: Tobias Markus <[email protected]>
Signed-off-by: Tianjia Zhang <[email protected]>
Signed-off-by: David Howells <[email protected]>
Reviewed-and-tested-by: Toke Høiland-Jørgensen <[email protected]>
Tested-by: João Fonseca <[email protected]>
Acked-by: Jarkko Sakkinen <[email protected]>
Cc: [email protected] # v5.10+
Signed-off-by: Linus Torvalds <[email protected]>
Tianjia Zhang
7178a107f5