diff options
| author | Stefan Berger <stefanb@linux.vnet.ibm.com> | 2016-11-16 08:56:13 -0500 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2016-11-28 01:31:32 +0200 |
| commit | 005451d44ad46623aac8349df15d7c0d1d8914c1 (patch) | |
| tree | 517a6c33f47e181253b35bb61772cf01891ce084 /drivers/char | |
| parent | 79eec5b940cffff14c7bd1b9eb856ccb36274cc2 (diff) | |
tpm: Check the bios_dir entry for NULL before accessing it
Check the bios_dir entry for NULL before accessing it. Currently
this crashes the driver when a TPM 2 is attached and the entries
are NULL.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_eventlog.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/char/tpm/tpm_eventlog.c b/drivers/char/tpm/tpm_eventlog.c index 8ee4ea10714b..34f0921f0203 100644 --- a/drivers/char/tpm/tpm_eventlog.c +++ b/drivers/char/tpm/tpm_eventlog.c @@ -449,10 +449,12 @@ void tpm_bios_log_teardown(struct tpm_chip *chip) * This design ensures that open() either safely gets kref or fails. */ for (i = (TPM_NUM_EVENT_LOG_FILES - 1); i >= 0; i--) { - inode = d_inode(chip->bios_dir[i]); - inode_lock(inode); - inode->i_private = NULL; - inode_unlock(inode); - securityfs_remove(chip->bios_dir[i]); + if (chip->bios_dir[i]) { + inode = d_inode(chip->bios_dir[i]); + inode_lock(inode); + inode->i_private = NULL; + inode_unlock(inode); + securityfs_remove(chip->bios_dir[i]); + } } } |