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Fix a memory leak in ec_key_simple_oct2priv
This is reproducible with my error injection patch. The test vector has been validated on the 1.1.1 branch but the issue is of course identical in all branches. $ ERROR_INJECT=1652710284 ../util/shlib_wrap.sh ./server-test ./corpora/server/4e48da8aecce6b9b58e8e4dbbf0523e6d2dd56dc 140587884632000:error:03078041:bignum routines:bn_expand_internal:malloc failure:crypto/bn/bn_lib.c:282: 140587884632000:error:10103003:elliptic curve routines:ec_key_simple_oct2priv:BN lib:crypto/ec/ec_key.c:662: 140587884632000:error:100DE08E:elliptic curve routines:old_ec_priv_decode:decode error:crypto/ec/ec_ameth.c:464: 140587884632000:error:0D0680A8:asn1 encoding routines:asn1_check_tlen:wrong tag:crypto/asn1/tasn_dec.c:1149: 140587884632000:error:0D07803A:asn1 encoding routines:asn1_item_embed_d2i:nested asn1 error:crypto/asn1/tasn_dec.c:309:Type=X509_ALGOR 140587884632000:error:0D08303A:asn1 encoding routines:asn1_template_noexp_d2i:nested asn1 error:crypto/asn1/tasn_dec.c:646:Field=pkeyalg, Type=PKCS8_PRIV_KEY_INFO 140587884632000:error:0907B00D:PEM routines:PEM_read_bio_PrivateKey:ASN1 lib:crypto/pem/pem_pkey.c:88: ================================================================= ==19676==ERROR: LeakSanitizer: detected memory leaks Direct leak of 24 byte(s) in 1 object(s) allocated from: #0 0x7fdd2a6bb09f in __interceptor_malloc ../../../../gcc-trunk/libsanitizer/asan/asan_malloc_linux.cpp:69 #1 0x7fdd2a2fa430 in CRYPTO_zalloc crypto/mem.c:230 #2 0x7fdd2a15df11 in BN_new crypto/bn/bn_lib.c:246 #3 0x7fdd2a15df88 in BN_secure_new crypto/bn/bn_lib.c:257 #4 0x7fdd2a247390 in ec_key_simple_oct2priv crypto/ec/ec_key.c:655 #5 0x7fdd2a241fc5 in d2i_ECPrivateKey crypto/ec/ec_asn1.c:1030 #6 0x7fdd2a23dac5 in old_ec_priv_decode crypto/ec/ec_ameth.c:463 #7 0x7fdd2a109db7 in d2i_PrivateKey crypto/asn1/d2i_pr.c:46 #8 0x7fdd2a33ab16 in PEM_read_bio_PrivateKey crypto/pem/pem_pkey.c:84 #9 0x7fdd2a3330b6 in PEM_read_bio_ECPrivateKey crypto/pem/pem_all.c:151 #10 0x402dba in FuzzerTestOneInput fuzz/server.c:592 #11 0x40370b in testfile fuzz/test-corpus.c:182 #12 0x402846 in main fuzz/test-corpus.c:226 #13 0x7fdd297b9f44 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21f44) SUMMARY: AddressSanitizer: 24 byte(s) leaked in 1 allocation(s). Reviewed-by: Tomas Mraz <[email protected]> Reviewed-by: Matt Caswell <[email protected]> (Merged from openssl#18366) (cherry picked from commit 22a96c6)
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