[PATCH 5.10 290/299] tools/power turbostat: Fix offset overflow issue in index converting
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-05-10 11:41:02
Also in:
lkml
From: Calvin Walton <redacted>
commit 13a779de4175df602366d129e41782ad7168cef0 upstream.
The idx_to_offset() function returns type int (32-bit signed), but
MSR_PKG_ENERGY_STAT is u32 and would be interpreted as a negative number.
The end result is that it hits the if (offset < 0) check in update_msr_sum()
which prevents the timer callback from updating the stat in the background when
long durations are used. The similar issue exists in offset_to_idx() and
update_msr_sum(). Fix this issue by converting the 'int' to 'off_t' accordingly.
Fixes: 9972d5d84d76 ("tools/power turbostat: Enable accumulate RAPL display")
Signed-off-by: Calvin Walton <redacted>
Signed-off-by: Len Brown <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/power/x86/turbostat/turbostat.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c@@ -291,9 +291,9 @@ struct msr_sum_array { /* The percpu MSR sum array.*/ struct msr_sum_array *per_cpu_msr_sum; -int idx_to_offset(int idx) +off_t idx_to_offset(int idx) { - int offset; + off_t offset; switch (idx) { case IDX_PKG_ENERGY:
@@ -323,7 +323,7 @@ int idx_to_offset(int idx) return offset; } -int offset_to_idx(int offset) +int offset_to_idx(off_t offset) { int idx;
@@ -3249,7 +3249,7 @@ static int update_msr_sum(struct thread_ for (i = IDX_PKG_ENERGY; i < IDX_COUNT; i++) { unsigned long long msr_cur, msr_last; - int offset; + off_t offset; if (!idx_valid(i)) continue;
@@ -3258,7 +3258,8 @@ static int update_msr_sum(struct thread_ continue; ret = get_msr(cpu, offset, &msr_cur); if (ret) { - fprintf(outf, "Can not update msr(0x%x)\n", offset); + fprintf(outf, "Can not update msr(0x%llx)\n", + (unsigned long long)offset); continue; }