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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: 5bbaf9d1fc ("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>
This commit is contained in:
Will Deacon 2020-06-03 12:16:37 +01:00
parent 082af5ec50
commit 333ed74689
1 changed files with 1 additions and 1 deletions
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2
kernel/scs.c
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@ -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) {