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| author | Rajiv Andrade <srajiv@linux.vnet.ibm.com> | 2009-02-05 13:06:30 -0200 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-02-06 09:06:43 +1100 |
| commit | 8920d5ad6ba74ae8ab020e90cc4d976980e68701 (patch) | |
| tree | 0ab5e0f47ed226a91e5520d9dcceee7d76ac7cac /drivers/char/tpm | |
| parent | 64c61d80a6e4c935a09ac5ff1d952967ca1268f8 (diff) | |
| download | blackbird-op-linux-8920d5ad6ba74ae8ab020e90cc4d976980e68701.tar.gz blackbird-op-linux-8920d5ad6ba74ae8ab020e90cc4d976980e68701.zip | |
TPM: integrity fix
Fix to function which is called by IMA, now tpm_chip_find_get() considers the case in which the machine doesn't have a TPM or, if it has, its TPM isn't enabled.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 62a5682578ca..ccdd828adcef 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -666,18 +666,20 @@ EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated); */ static struct tpm_chip *tpm_chip_find_get(int chip_num) { - struct tpm_chip *pos; + struct tpm_chip *pos, *chip = NULL; rcu_read_lock(); list_for_each_entry_rcu(pos, &tpm_chip_list, list) { if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num) continue; - if (try_module_get(pos->dev->driver->owner)) + if (try_module_get(pos->dev->driver->owner)) { + chip = pos; break; + } } rcu_read_unlock(); - return pos; + return chip; } #define TPM_ORDINAL_PCRREAD cpu_to_be32(21) |
