Hello.
I'm trying to debug openvpn test case, and I'm completely puzzled.
I've looked at it 10 time before noticed, but...
We have in code src/openvpn/crypto_openssl.c:
734 int
735 cipher_ctx_reset(EVP_CIPHER_CTX *ctx, uint8_t *iv_buf)
736 {
737 return EVP_CipherInit_ex(ctx, NULL, NULL, NULL, iv_buf, -1);
738 }
And test openvpn-2.4.3/tests/t_lpback.sh fails with
line 48: 21901: Memory fault(coredump)
-n Testing cipher AES-128-OFB...
OK
-n Testing cipher AES-192-CBC...
OK
-n Testing cipher AES-192-CFB...
OK
-n Testing cipher AES-192-CFB1...
OK
-n Testing cipher AES-192-CFB8...
OK
-n Testing cipher AES-192-GCM...
FAILED
If we look at core, we'll see
mdb core
Loading modules: [ libc.so.1 ld.so.1 ]
$C
08046378 libcrypto.so.1.0.0`aesni_gcm_init_key+0x117(8141d28, 0,
80463f0, 1)
080463a8 libcrypto.so.1.0.0`EVP_CipherInit_ex+0x48f(8141d28, 0, 0, 0,
80463f0, 1)
080463d8 cipher_ctx_reset+0x1c(8141d28, 80463f0, 4, 0)
08046448 openvpn_encrypt_aead+0x280(80464b0, 64c, 38, 4, 815f94c,
8046d20)
08046488 openvpn_encrypt+0x56(80464b0, 64c, 38, 0, 815f94c, 8046d20)
08046528 test_crypto+0x43b(8046d20, 8046bc8, 8046558, 80aa22b)
08046558 test_crypto_thread+0xa2(8046574, 80f173b, 80f8800, feffb0a8)
08046f08 do_test_crypto+0x98(8046f24, 80f8780, 80f8800, 80a7f6a)
080478a8 openvpn_main+0x210(6, 8047908, feef5315, 80eca4f)
080478c8 main+0x20(80478bc, fef6e688, 80478fc, 8070273, 6, 8047908)
080478fc _start+0x83(6, 8047a3c, 8047a53, 8047a61, 8047a6a, 8047a74)
Wait... Yes,
080463a8 libcrypto.so.1.0.0`EVP_CipherInit_ex+0x48f(8141d28, 0, 0, 0,
80463f0, 1)
cipher_ctx_reset+0x1c::dis
cipher_ctx_reset+1: movl %esp,%ebp
cipher_ctx_reset+3: subl $0x8,%esp
cipher_ctx_reset+6: subl $0x8,%esp
cipher_ctx_reset+9: pushl $-0x1 <0xffffffff>
<<<<<<<<<<<How does it become 1?
cipher_ctx_reset+0xb: pushl 0xc(%ebp)
cipher_ctx_reset+0xe: pushl $0x0
cipher_ctx_reset+0x10: pushl $0x0
cipher_ctx_reset+0x12: pushl $0x0
cipher_ctx_reset+0x14: pushl 0x8(%ebp)
cipher_ctx_reset+0x17: call -0xc0f4
<PLT=libcrypto.so.1.0.0`EVP_CipherInit_ex>
cipher_ctx_reset+0x1c: addl $0x20,%esp
cipher_ctx_reset+0x1f: leave
cipher_ctx_reset+0x20: ret
cipher_ctx_update_ad: pushl %ebp
cipher_ctx_update_ad+1: movl %esp,%ebp
cipher_ctx_update_ad+3: subl $0x18,%esp
cipher_ctx_update_ad+6: subl $0xc,%esp
cipher_ctx_update_ad+9: pushl 0x10(%ebp)
cipher_ctx_update_ad+0xc: pushl 0xc(%ebp)
cipher_ctx_update_ad+0xf: leal -0xc(%ebp),%eax
cipher_ctx_update_ad+0x12: pushl %eax
Do I misread mdb output? But how does -1 become 1 ????
--
System Administrator of Southern Federal University Computer Center
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