commit db68ce10c4f0a27c1ff9fa0e789e5c41f8c4ea63
author Al Viro <viro@zeniv.linux.org.uk> Mon Mar 20 21:08:07 2017 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Tue Mar 28 16:43:25 2017 -0400
tree 77eda1d247853a2d414e0047c620b3c72bb11a1a
parent aaa2e7ac80f679230faf28a8e12e8d68dbe977eb

new helper: uaccess_kernel()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

include/linux/uaccess.h

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index b786ca2..9c3ae87 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -7,6 +7,8 @@
 #define VERIFY_READ 0
 #define VERIFY_WRITE 1
 
+#define uaccess_kernel() segment_eq(get_fs(), KERNEL_DS)
+
 #include <asm/uaccess.h>
 
 static __always_inline void pagefault_disabled_inc(void)

include/rdma/ib.h

diff --git a/include/rdma/ib.h b/include/rdma/ib.h
index 9b4c22a3..66dbed0 100644
--- a/include/rdma/ib.h
+++ b/include/rdma/ib.h
@@ -100,7 +100,7 @@ struct sockaddr_ib {
  */
 static inline bool ib_safe_file_access(struct file *filp)
 {
-	return filp->f_cred == current_cred() && segment_eq(get_fs(), USER_DS);
+	return filp->f_cred == current_cred() && !uaccess_kernel();
 }
 
 #endif /* _RDMA_IB_H */