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

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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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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) {