[PATCH 2/2] KEYS: trusted: Use common error handling code in tpm_unseal()
From: SF Markus Elfring <hidden>
Date: 2017-11-10 20:30:45
Also in:
kernel-janitors, keyrings, linux-integrity, lkml
Subsystem:
keys/keyrings, security subsystem, the rest · Maintainers:
David Howells, Jarkko Sakkinen, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
From: Markus Elfring <redacted> Date: Fri, 10 Nov 2017 21:15:53 +0100 * Add a jump target so that a specific error message is stored only once at the end of this function implementation. * Replace two calls of the macro "pr_info" by goto statements. * Adjust two condition checks. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <redacted> --- security/keys/trusted.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/security/keys/trusted.c b/security/keys/trusted.c
index fd06d0c5323b..a295eaae40ba 100644
--- a/security/keys/trusted.c
+++ b/security/keys/trusted.c@@ -591,15 +591,12 @@ static int tpm_unseal(struct tpm_buf *tb, /* sessions for unsealing key and data */ ret = oiap(tb, &authhandle1, enonce1); - if (ret < 0) { - pr_info("trusted_key: oiap failed (%d)\n", ret); - return ret; - } + if (ret) + goto report_failure; + ret = oiap(tb, &authhandle2, enonce2); - if (ret < 0) { - pr_info("trusted_key: oiap failed (%d)\n", ret); - return ret; - } + if (ret) + goto report_failure; ordinal = htonl(TPM_ORD_UNSEAL); keyhndl = htonl(SRKHANDLE);
@@ -654,6 +651,10 @@ static int tpm_unseal(struct tpm_buf *tb, } memcpy(data, tb->data + TPM_DATA_OFFSET + sizeof(uint32_t), *datalen); return 0; + +report_failure: + pr_info("trusted_key: oiap failed (%d)\n", ret); + return ret; } /*
--
2.15.0
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