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authorPeter Huewe <huewe.external.infineon@googlemail.com>2011-03-29 13:31:25 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-14 16:53:03 -0700
commit4aca00c0f9277340c144eb78e102b1967da0c417 (patch)
treed3db32ea8e90cbaa5e0d16e9345b65b88db0f4fd /drivers
parentbec8bc96d5616ce1d98ed59c1b54ad7d57557711 (diff)
char/tpm: Fix unitialized usage of data buffer
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/tpm/tpm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 329b79659002..4b6c3eac1e28 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -955,7 +955,7 @@ int tpm_open(struct inode *inode, struct file *file)
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);