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36 lines
1.1 KiB
36 lines
1.1 KiB
1 year ago
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From cfb18410e8f706646adce2bd9f6cffecbd363d2b Mon Sep 17 00:00:00 2001
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From: Imran Desai <imran.desai@intel.com>
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Date: Thu, 21 Jul 2022 15:19:36 -0700
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Subject: [PATCH 08/17] lib/tpm2_alg_util.c: Fix potential null pointer
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dereference
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Must test ext_alg_str before dereferencing in
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tpm2_alg_util_handle_rsa_ext_alg
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char *ext_alg_str = calloc(1, strlen(alg_spec) + strlen("rsa") +
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RSA_KEYBITS_STRLEN)
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Signed-off-by: Imran Desai <imran.desai@intel.com>
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---
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lib/tpm2_alg_util.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/lib/tpm2_alg_util.c b/lib/tpm2_alg_util.c
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index 1e984d74..580f41cb 100644
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--- a/lib/tpm2_alg_util.c
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+++ b/lib/tpm2_alg_util.c
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@@ -601,6 +601,10 @@ tool_rc tpm2_alg_util_handle_rsa_ext_alg(const char *alg_spec,
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#define RSA_KEYBITS_STRLEN 6
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char *ext_alg_str = calloc(1, strlen(alg_spec) + strlen("rsa") +
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RSA_KEYBITS_STRLEN);
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+ if (ext_alg_str == NULL) {
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+ LOG_ERR("oom");
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+ return tool_rc_general_error;
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+ }
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strcat(ext_alg_str, "rsa");
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switch(public->publicArea.parameters.rsaDetail.keyBits) {
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--
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2.40.1
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