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authorAlex Ng <alexng@messages.microsoft.com>2017-08-06 23:12:56 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-16 19:14:43 +0300
commitddce54b6a95ed5ee3011b4771fda69c2d8a6d538 (patch)
treea48be6817b6de2ae570db9c312325a6be6575c83 /drivers/hv/hv_kvp.c
parentc548f3957efa57b6f1a1f4c90013232f6f488682 (diff)
downloadlinux-ddce54b6a95ed5ee3011b4771fda69c2d8a6d538.tar.xz
Drivers: hv: kvp: Use MAX_ADAPTER_ID_SIZE for translating adapter id
There's a bug which passes the output buffer size as MAX_IP_ADDR_SIZE, when converting the adapter_id field to UTF16. This is much larger than the actual size (MAX_ADAPTER_ID_SIZE). Fix this by passing the proper size. Fortunately, the translation is limited by the length of the input. This explains why we haven't seen output buffer overflow conditions. Signed-off-by: Alex Ng <alexng@messages.microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/hv_kvp.c')
-rw-r--r--drivers/hv/hv_kvp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
index 9a90b915b5be..5eed1e7da15c 100644
--- a/drivers/hv/hv_kvp.c
+++ b/drivers/hv/hv_kvp.c
@@ -304,7 +304,7 @@ static int process_ob_ipinfo(void *in_msg, void *out_msg, int op)
strlen((char *)in->body.kvp_ip_val.adapter_id),
UTF16_HOST_ENDIAN,
(wchar_t *)out->kvp_ip_val.adapter_id,
- MAX_IP_ADDR_SIZE);
+ MAX_ADAPTER_ID_SIZE);
if (len < 0)
return len;