stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms
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 <danielmicay@gmail.com> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Arjan van Ven <arjan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kernel-hardening@lists.openwall.com Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20170504133209.3053-1-danielmicay@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -536,7 +536,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node)
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set_task_stack_end_magic(tsk);
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set_task_stack_end_magic(tsk);
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#ifdef CONFIG_CC_STACKPROTECTOR
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#ifdef CONFIG_CC_STACKPROTECTOR
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tsk->stack_canary = get_random_int();
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tsk->stack_canary = get_random_long();
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#endif
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#endif
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/*
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/*
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