nilfs2: fix potential memory overrun on inode

[mirror_ubuntu-bionic-kernel.git] / fs / binfmt_elf.c

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 02b16910f4c9d500619286029ee16f0815bce269..995986b8e36b8f3fd8529582c50e545d9b26322e 100644 (file)
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -645,11 +645,12 @@ out:
 
 static unsigned long randomize_stack_top(unsigned long stack_top)
 {
-       unsigned int random_variable = 0;
+       unsigned long random_variable = 0;
 
        if ((current->flags & PF_RANDOMIZE) &&
                !(current->personality & ADDR_NO_RANDOMIZE)) {
-               random_variable = get_random_int() & STACK_RND_MASK;
+               random_variable = (unsigned long) get_random_int();
+               random_variable &= STACK_RND_MASK;
                random_variable <<= PAGE_SHIFT;
        }
 #ifdef CONFIG_STACK_GROWSUP