AFAICS get_random_long() doesn't exist in 4.4 (except in arch/x86/boot/compressed/aslr.c)? IIRC the same problem already occured with another kernel version?
On Mon, Jun 12, 2017 at 5:25 PM, Greg Kroah-Hartman <[email protected]> wrote: > 4.4-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Daniel Micay <[email protected]> > > commit 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 upstream. > > The stack canary is an 'unsigned long' and should be fully initialized to > random data rather than only 32 bits of random data. > > Signed-off-by: Daniel Micay <[email protected]> > Acked-by: Arjan van de Ven <[email protected]> > Acked-by: Rik van Riel <[email protected]> > Acked-by: Kees Cook <[email protected]> > Cc: Arjan van Ven <[email protected]> > Cc: Linus Torvalds <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: [email protected] > Cc: [email protected] > Link: http://lkml.kernel.org/r/[email protected] > Signed-off-by: Ingo Molnar <[email protected]> > Signed-off-by: Greg Kroah-Hartman <[email protected]> > > --- > kernel/fork.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > --- a/kernel/fork.c > +++ b/kernel/fork.c > @@ -368,7 +368,7 @@ static struct task_struct *dup_task_stru > set_task_stack_end_magic(tsk); > > #ifdef CONFIG_CC_STACKPROTECTOR > - tsk->stack_canary = get_random_int(); > + tsk->stack_canary = get_random_long(); > #endif > > /* > >
