qed: Fix stack corruption on probe

Commit fe56b9e6a8d95 ("qed: Add module with basic common support")
has introduced a stack corruption during probe, where filling a
local struct with data to be sent to management firmware is incorrectly
filled; The data is written outside of the struct and corrupts
the stack.

Changes from v1:
----------------
 - Correct the value written [Caught by David Laight]

Fixes: fe56b9e6a8d95 ("qed: Add module with basic common support")
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.c b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
index a240f26..f776a77 100644 (file)
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
@@ -1153,8 +1153,8 @@ qed_mcp_send_drv_version(struct qed_hwfn *p_hwfn,
        p_drv_version = &union_data.drv_version;
        p_drv_version->version = p_ver->version;
 
-       for (i = 0; i < MCP_DRV_VER_STR_SIZE - 1; i += 4) {
-               val = cpu_to_be32(p_ver->name[i]);
+       for (i = 0; i < (MCP_DRV_VER_STR_SIZE - 4) / sizeof(u32); i++) {
+               val = cpu_to_be32(*((u32 *)&p_ver->name[i * sizeof(u32)]));
                *(__be32 *)&p_drv_version->name[i * sizeof(u32)] = val;
        }