Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / block / bsg.c

diff --git a/kernel/block/bsg.c b/kernel/block/bsg.c
index d214e92..b9a5361 100644 (file)
--- a/kernel/block/bsg.c
+++ b/kernel/block/bsg.c
@@ -655,6 +655,9 @@ bsg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 
        dprintk("%s: write %Zd bytes\n", bd->name, count);
 
+       if (unlikely(segment_eq(get_fs(), KERNEL_DS)))
+               return -EINVAL;
+
        bsg_set_block(bd, file);
 
        bytes_written = 0;