22 lines
567 B
Diff
22 lines
567 B
Diff
openssl: avoid NULL pointer dereference in EVP_DigestInit_ex()
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We should avoid accessing the type pointer if it's NULL,
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this could happen if ctx->digest is not NULL.
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Upstream-Status: Submitted
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http://www.mail-archive.com/openssl-dev@openssl.org/msg32860.html
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Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com>
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---
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--- a/crypto/evp/digest.c
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+++ b/crypto/evp/digest.c
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@@ -199,7 +199,7 @@
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return 0;
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}
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#endif
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- if (ctx->digest != type)
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+ if (type && (ctx->digest != type))
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{
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if (ctx->digest && ctx->digest->ctx_size)
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OPENSSL_free(ctx->md_data);
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