xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Bluetooth: allocate data for kpp on heap

Browse Source 
Bluetooth would crash when computing ECDH keys with kpp
if VMAP_STACK is enabled. Fix by allocating data passed
to kpp on heap.

Fixes: 58771c1c ("Bluetooth: convert smp and selftest to crypto kpp
API")
Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Salvatore Benedetto
2017-04-25 16:59:47 +01:00
committed by Marcel Holtmann
parent 58771c1cb0
commit 763d9a302a
2 changed files with 33 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
net/bluetooth/selftest.c
View File

@@ -142,18 +142,30 @@ static int __init test_ecdh_sample(const u8 priv_a[32], const u8 priv_b[32],
const u8 pub_a[64], const u8 pub_b[64],
const u8 dhkey[32])
{
u8 dhkey_a[32], dhkey_b[32];
u8 *tmp, *dhkey_a, *dhkey_b;
int ret = 0;
tmp = kmalloc(64, GFP_KERNEL);
if (!tmp)
return -EINVAL;
dhkey_a = &tmp[0];
dhkey_b = &tmp[32];
compute_ecdh_secret(pub_b, priv_a, dhkey_a);
compute_ecdh_secret(pub_a, priv_b, dhkey_b);
if (memcmp(dhkey_a, dhkey, 32))
return -EINVAL;
if (memcmp(dhkey_a, dhkey, 32)) {
ret = -EINVAL;
goto out;
}
if (memcmp(dhkey_b, dhkey, 32))
return -EINVAL;
ret = -EINVAL;
return 0;
out:
kfree(dhkey_a);
return ret;
}
static char test_ecdh_buffer[32];