Commit 333ed746 authored Jun 03, 2020 by Will Deacon

scs: Report SCS usage in bytes rather than number of entries



Fix the SCS debug usage check so that we report the number of bytes
used, rather than the number of entries.

Fixes: 5bbaf9d1 ("scs: Add support for stack usage debugging")
Reported-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Will Deacon <will@kernel.org>

parent 082af5ec

kernel/scs.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -74,7 +74,7 @@ static void scs_check_usage(struct task_struct *tsk)
		for (p = task_scs(tsk); p < __scs_magic(tsk); ++p) {
		if (!READ_ONCE_NOCHECK(*p))
		break;
		used++;
		used += sizeof(*p);
		}

		while (used > curr) {

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