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| author | Will Deacon <will@kernel.org> | 2020-06-03 14:16:37 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-06-04 18:14:56 +0300 |
| commit | 333ed74689b8fca097574124fef7fa0e3d7f79d4 (patch) | |
| tree | b4f2b452c5671951f96d01eaf5bccc8e5995f5a7 | |
| parent | 082af5ec5080b028f7d0846a6c27cbb87f288205 (diff) | |
| download | linux-333ed74689b8fca097574124fef7fa0e3d7f79d4.tar.xz | |
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: 5bbaf9d1fcb9 ("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>
| -rw-r--r-- | kernel/scs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/scs.c b/kernel/scs.c index 222a7a9ad543..5d4d9bbdec36 100644 --- a/kernel/scs.c +++ b/kernel/scs.c @@ -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) { |