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| author | Kees Cook <keescook@chromium.org> | 2023-09-22 10:52:20 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-18 14:43:22 -0700 |
| commit | fbd126f5a658b92c7f6af986a6d89cf5e5693268 (patch) | |
| tree | 8502caf20617622a06d3ef68334a7618b5a61151 /kernel/gcov | |
| parent | 71ca5ee18708c1f9f086e20ac0a657009bcfe43a (diff) | |
| download | lwn-fbd126f5a658b92c7f6af986a6d89cf5e5693268.tar.gz lwn-fbd126f5a658b92c7f6af986a6d89cf5e5693268.zip | |
gcov: annotate struct gcov_iterator 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 checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct gcov_iterator.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Link: https://lkml.kernel.org/r/20230922175220.work.327-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/gcov')
| -rw-r--r-- | kernel/gcov/fs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c index 5c3086cad8f9..01520689b57c 100644 --- a/kernel/gcov/fs.c +++ b/kernel/gcov/fs.c @@ -99,7 +99,7 @@ struct gcov_iterator { struct gcov_info *info; size_t size; loff_t pos; - char buffer[]; + char buffer[] __counted_by(size); }; /** |