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| author | Roberto Sassu <roberto.sassu@polito.it> | 2011-12-19 15:57:28 +0100 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2011-12-19 22:07:54 -0500 |
| commit | 7b7e5916aa2f46e57f8bd8cb89c34620ebfda5da (patch) | |
| tree | af324024e68047b9fff7ddf49c3e8f8e6024792e /security/integrity | |
| parent | 45fae7493970d7c45626ccd96d4a74f5f1eea5a9 (diff) | |
| download | linux-7b7e5916aa2f46e57f8bd8cb89c34620ebfda5da.tar.gz linux-7b7e5916aa2f46e57f8bd8cb89c34620ebfda5da.tar.bz2 linux-7b7e5916aa2f46e57f8bd8cb89c34620ebfda5da.zip | |
ima: fix invalid memory reference
Don't free a valid measurement entry on TPM PCR extend failure.
Signed-off-by: Roberto Sassu <roberto.sassu@polito.it>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'security/integrity')
| -rw-r--r-- | security/integrity/ima/ima_queue.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/security/integrity/ima/ima_queue.c b/security/integrity/ima/ima_queue.c index e1a5062b1f6a..55a6271bce7a 100644 --- a/security/integrity/ima/ima_queue.c +++ b/security/integrity/ima/ima_queue.c @@ -23,6 +23,8 @@ #include <linux/slab.h> #include "ima.h" +#define AUDIT_CAUSE_LEN_MAX 32 + LIST_HEAD(ima_measurements); /* list of all measurements */ /* key: inode (before secure-hashing a file) */ @@ -94,7 +96,8 @@ static int ima_pcr_extend(const u8 *hash) result = tpm_pcr_extend(TPM_ANY_NUM, CONFIG_IMA_MEASURE_PCR_IDX, hash); if (result != 0) - pr_err("IMA: Error Communicating to TPM chip\n"); + pr_err("IMA: Error Communicating to TPM chip, result: %d\n", + result); return result; } @@ -106,8 +109,9 @@ int ima_add_template_entry(struct ima_template_entry *entry, int violation, { u8 digest[IMA_DIGEST_SIZE]; const char *audit_cause = "hash_added"; + char tpm_audit_cause[AUDIT_CAUSE_LEN_MAX]; int audit_info = 1; - int result = 0; + int result = 0, tpmresult = 0; mutex_lock(&ima_extend_list_mutex); if (!violation) { @@ -129,9 +133,11 @@ int ima_add_template_entry(struct ima_template_entry *entry, int violation, if (violation) /* invalidate pcr */ memset(digest, 0xff, sizeof digest); - result = ima_pcr_extend(digest); - if (result != 0) { - audit_cause = "TPM error"; + tpmresult = ima_pcr_extend(digest); + if (tpmresult != 0) { + snprintf(tpm_audit_cause, AUDIT_CAUSE_LEN_MAX, "TPM_error(%d)", + tpmresult); + audit_cause = tpm_audit_cause; audit_info = 0; } out: |