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| author |  Kees Cook <keescook@chromium.org>
| 2023-10-06 13:17:54 -0700 |
|---|---|---|
| committer |  Ingo Molnar <mingo@kernel.org>
| 2023-10-08 12:18:17 +0200 |
| commit | a56d5551e1993ca84dd0c69df5a3d8223d13fb5f (patch) | |
| tree | b5e1fe687acf191a9ba9e8762c2f73be91c00ff4 /arch/x86/events | |
| parent | perf/core: Rename perf_proc_update_handler() -> perf_event_max_sample_rate_ha... (diff) | |
| download | linux-a56d5551e1993ca84dd0c69df5a3d8223d13fb5f.tar.gz linux-a56d5551e1993ca84dd0c69df5a3d8223d13fb5f.tar.bz2 linux-a56d5551e1993ca84dd0c69df5a3d8223d13fb5f.zip | |
perf/x86/rapl: Annotate 'struct rapl_pmus' with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS=y (for
array indexing) and CONFIG_FORTIFY_SOURCE=y (for strcpy/memcpy-family
functions).
Found with Coccinelle:
https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1]
Add __counted_by for 'struct rapl_pmus'.
No change in functionality intended.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20231006201754.work.473-kees@kernel.org
Diffstat (limited to 'arch/x86/events')
| -rw-r--r-- | arch/x86/events/rapl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c index c2c37fb0a228..8d98d468b976 100644 --- a/arch/x86/events/rapl.c +++ b/arch/x86/events/rapl.c @@ -115,7 +115,7 @@ struct rapl_pmu { struct rapl_pmus { struct pmu pmu; unsigned int maxdie; - struct rapl_pmu *pmus[]; + struct rapl_pmu *pmus[] __counted_by(maxdie); }; enum rapl_unit_quirk { |