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| author | Calvin Walton <calvin.walton@kepstin.ca> | 2021-04-28 17:09:16 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2021-05-04 18:33:41 -0400 |
| commit | 13a779de4175df602366d129e41782ad7168cef0 (patch) | |
| tree | 8405a2d05e136f55d667267ecb047f9e29ef96bc /tools/power/x86/turbostat/turbostat.c | |
| parent | 301b1d3a9104f4f3a8ab4171cf88d0f55d632b41 (diff) | |
| download | linux-13a779de4175df602366d129e41782ad7168cef0.tar.gz linux-13a779de4175df602366d129e41782ad7168cef0.tar.bz2 linux-13a779de4175df602366d129e41782ad7168cef0.zip | |
tools/power turbostat: Fix offset overflow issue in index converting
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 <calvin.walton@kepstin.ca>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'tools/power/x86/turbostat/turbostat.c')
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index b5f4ec24fea9..f3cb06a115b5 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -296,9 +296,9 @@ 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: @@ -328,7 +328,7 @@ int idx_to_offset(int idx) return offset; } -int offset_to_idx(int offset) +int offset_to_idx(off_t offset) { int idx; @@ -3338,7 +3338,7 @@ static int update_msr_sum(struct thread_data *t, struct core_data *c, struct pkg 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; @@ -3347,7 +3347,8 @@ static int update_msr_sum(struct thread_data *t, struct core_data *c, struct pkg 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; } |