Merge tag 'v3.10.107' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / block / bsg.c

diff --git a/block/bsg.c b/block/bsg.c
index 420a5a9f1b23f72963dc928b2dd009be443e3337..76801e57f556d8c3cc055842ba26516b6e944dd0 100644 (file)
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -675,6 +675,9 @@ 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;