From 8754fa5f60ac4fdb5127f2eded9c7bbe0651c880 Mon Sep 17 00:00:00 2001 From: Bernd Edlinger Date: Sat, 21 May 2022 07:50:46 +0200 Subject: Fix a memory leak in crl_set_issuers This can be reproduced 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=1653520461 ../util/shlib_wrap.sh ./cms-test ./corpora/cms/3eff1d2f1232bd66d5635db2c3f9e7f23830dfd1 log file: cms-3eff1d2f1232bd66d5635db2c3f9e7f23830dfd1-32454-test.out ERROR_INJECT=1653520461 #0 0x7fd5d8b8eeba in __sanitizer_print_stack_trace ../../../../gcc-trunk/libsanitizer/asan/asan_stack.cpp:87 #1 0x402fc4 in my_realloc fuzz/test-corpus.c:129 #2 0x7fd5d8893c49 in sk_reserve crypto/stack/stack.c:198 #3 0x7fd5d8893c49 in OPENSSL_sk_insert crypto/stack/stack.c:242 #4 0x7fd5d88d6d7f in sk_GENERAL_NAMES_push include/openssl/x509v3.h:168 #5 0x7fd5d88d6d7f in crl_set_issuers crypto/x509/x_crl.c:111 #6 0x7fd5d88d6d7f in crl_cb crypto/x509/x_crl.c:246 #7 0x7fd5d85dc032 in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:432 #8 0x7fd5d85dcaf5 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:643 #9 0x7fd5d85dd288 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:518 #10 0x7fd5d85db2b5 in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:259 #11 0x7fd5d85dc813 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:611 #12 0x7fd5d85dd288 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:518 #13 0x7fd5d85db9ce in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:382 #14 0x7fd5d85dca28 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:633 #15 0x7fd5d85dd288 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:518 #16 0x7fd5d85db9ce in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:382 #17 0x7fd5d85dcaf5 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:643 #18 0x7fd5d85dd7d3 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:494 #19 0x7fd5d85db9ce in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:382 #20 0x7fd5d85ddd1f in ASN1_item_ex_d2i crypto/asn1/tasn_dec.c:124 #21 0x7fd5d85dde35 in ASN1_item_d2i crypto/asn1/tasn_dec.c:114 #22 0x7fd5d85a77e0 in ASN1_item_d2i_bio crypto/asn1/a_d2i_fp.c:69 #23 0x402845 in FuzzerTestOneInput fuzz/cms.c:43 #24 0x402bbb in testfile fuzz/test-corpus.c:182 #25 0x402626 in main fuzz/test-corpus.c:226 #26 0x7fd5d7c81f44 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21f44) #27 0x402706 (/home/ed/OPC/openssl/fuzz/cms-test+0x402706) ================================================================= ==29625==ERROR: LeakSanitizer: detected memory leaks Direct leak of 32 byte(s) in 1 object(s) allocated from: #0 0x7fd5d8b8309f in __interceptor_malloc ../../../../gcc-trunk/libsanitizer/asan/asan_malloc_linux.cpp:69 #1 0x7fd5d87c2430 in CRYPTO_zalloc crypto/mem.c:230 #2 0x7fd5d889501f in OPENSSL_sk_new_reserve crypto/stack/stack.c:209 #3 0x7fd5d85dcbc3 in sk_ASN1_VALUE_new_null include/openssl/asn1t.h:928 #4 0x7fd5d85dcbc3 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:577 #5 0x7fd5d85dd288 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:518 #6 0x7fd5d85db104 in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:178 #7 0x7fd5d85ddd1f in ASN1_item_ex_d2i crypto/asn1/tasn_dec.c:124 #8 0x7fd5d85dde35 in ASN1_item_d2i crypto/asn1/tasn_dec.c:114 #9 0x7fd5d88f86d9 in X509V3_EXT_d2i crypto/x509v3/v3_lib.c:142 #10 0x7fd5d88d6d3c in crl_set_issuers crypto/x509/x_crl.c:97 #11 0x7fd5d88d6d3c in crl_cb crypto/x509/x_crl.c:246 #12 0x7fd5d85dc032 in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:432 #13 0x7fd5d85dcaf5 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:643 #14 0x7fd5d85dd288 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:518 #15 0x7fd5d85db2b5 in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:259 #16 0x7fd5d85dc813 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:611 #17 0x7fd5d85dd288 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:518 #18 0x7fd5d85db9ce in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:382 #19 0x7fd5d85dca28 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:633 #20 0x7fd5d85dd288 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:518 #21 0x7fd5d85db9ce in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:382 #22 0x7fd5d85dcaf5 in asn1_template_noexp_d2i crypto/asn1/tasn_dec.c:643 #23 0x7fd5d85dd7d3 in asn1_template_ex_d2i crypto/asn1/tasn_dec.c:494 #24 0x7fd5d85db9ce in asn1_item_embed_d2i crypto/asn1/tasn_dec.c:382 #25 0x7fd5d85ddd1f in ASN1_item_ex_d2i crypto/asn1/tasn_dec.c:124 #26 0x7fd5d85dde35 in ASN1_item_d2i crypto/asn1/tasn_dec.c:114 #27 0x7fd5d85a77e0 in ASN1_item_d2i_bio crypto/asn1/a_d2i_fp.c:69 #28 0x402845 in FuzzerTestOneInput fuzz/cms.c:43 #29 0x402bbb in testfile fuzz/test-corpus.c:182 #30 0x402626 in main fuzz/test-corpus.c:226 #31 0x7fd5d7c81f44 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21f44) SUMMARY: AddressSanitizer: 32 byte(s) leaked in 1 allocation(s). Reviewed-by: Paul Dale Reviewed-by: Tomas Mraz (Merged from https://github.com/openssl/openssl/pull/18391) (cherry picked from commit e9007e09792e3735d4973743634ff55d354fc7d8) --- crypto/x509/x_crl.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/crypto/x509/x_crl.c b/crypto/x509/x_crl.c index 9af39a45fc..a4e4a415de 100644 --- a/crypto/x509/x_crl.c +++ b/crypto/x509/x_crl.c @@ -103,13 +103,17 @@ static int crl_set_issuers(X509_CRL *crl) if (gtmp) { gens = gtmp; - if (!crl->issuers) { + if (crl->issuers == NULL) { crl->issuers = sk_GENERAL_NAMES_new_null(); - if (!crl->issuers) + if (crl->issuers == NULL) { + GENERAL_NAMES_free(gtmp); return 0; + } } - if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp)) + if (!sk_GENERAL_NAMES_push(crl->issuers, gtmp)) { + GENERAL_NAMES_free(gtmp); return 0; + } } rev->issuer = gens; -- cgit v1.2.3