Security: round mmap hint address above mmap_min_addr

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 938313c76d02f4f6d9ef62471330836ae6448f73..f4cfc6ac08dbbc2e4bb0e937ee256d65ea1973fa 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -912,6 +912,9 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
        if (!len)
                return -EINVAL;
 
+       if (!(flags & MAP_FIXED))
+               addr = round_hint_to_min(addr);
+
        error = arch_mmap_check(addr, len, flags);
        if (error)
                return error;