| Date | Wed, 13 Apr 2011 08:51:04 -0700 | From | Greg KH <> | Subject | [40/74] char/tpm: Fix unitialized usage of data buffer |
| |
2.6.32-longterm review patch. If anyone has any objections, please let us know.
------------------
From: Peter Huewe <huewe.external.infineon@googlemail.com>
commit 1309d7afbed112f0e8e90be9af975550caa0076b upstream.
This patch fixes information leakage to the userspace by initializing the data buffer to zero.
Reported-by: Peter Huewe <huewe.external@infineon.com> Signed-off-by: Peter Huewe <huewe.external@infineon.com> Signed-off-by: Marcel Selhorst <m.selhorst@sirrix.com> [ Also removed the silly "* sizeof(u8)". If that isn't 1, we have way deeper problems than a simple multiplication can fix. - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/char/tpm/tpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -969,7 +969,7 @@ int tpm_open(struct inode *inode, struct return -EBUSY; } - chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL); + chip->data_buffer = kzalloc(TPM_BUFSIZE, GFP_KERNEL); if (chip->data_buffer == NULL) { clear_bit(0, &chip->is_open); put_device(chip->dev);
|