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| author |   David S. Miller <davem@davemloft.net> | 2011-10-07 13:38:43 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-07 13:38:43 -0400 |
| commit | 88c5100c28b02c4b2b2c6f6fafbbd76d90f698b9 (patch) | |
| tree | 08c4399e0341f7eb0ccb24e15f2cab687275c2a4 /drivers/char/tpm/tpm.c | |
| parent | net: use sock_valbool_flag to set/clear SOCK_RXQ_OVFL (diff) | |
| parent | Merge git://github.com/davem330/net (diff) | |
| download | linux-dev-88c5100c28b02c4b2b2c6f6fafbbd76d90f698b9.tar.xz linux-dev-88c5100c28b02c4b2b2c6f6fafbbd76d90f698b9.zip | |
Merge branch 'master' of github.com:davem330/net
Conflicts:
net/batman-adv/soft-interface.c
Diffstat (limited to 'drivers/char/tpm/tpm.c')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index caf8012ef47c..9ca5c021d0b6 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -383,6 +383,9 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, u32 count, ordinal; unsigned long stop; + if (bufsiz > TPM_BUFSIZE) + bufsiz = TPM_BUFSIZE; + count = be32_to_cpu(*((__be32 *) (buf + 2))); ordinal = be32_to_cpu(*((__be32 *) (buf + 6))); if (count == 0) @@ -1102,6 +1105,7 @@ ssize_t tpm_read(struct file *file, char __user *buf, { struct tpm_chip *chip = file->private_data; ssize_t ret_size; + int rc; del_singleshot_timer_sync(&chip->user_read_timer); flush_work_sync(&chip->work); @@ -1112,8 +1116,11 @@ ssize_t tpm_read(struct file *file, char __user *buf, ret_size = size; mutex_lock(&chip->buffer_mutex); - if (copy_to_user(buf, chip->data_buffer, ret_size)) + rc = copy_to_user(buf, chip->data_buffer, ret_size); + memset(chip->data_buffer, 0, ret_size); + if (rc) ret_size = -EFAULT; + mutex_unlock(&chip->buffer_mutex); } |