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authorKees Cook <keescook@chromium.org>2023-09-22 10:52:20 -0700
committerAndrew Morton <akpm@linux-foundation.org>2023-10-18 14:43:22 -0700
commitfbd126f5a658b92c7f6af986a6d89cf5e5693268 (patch)
tree8502caf20617622a06d3ef68334a7618b5a61151
parent71ca5ee18708c1f9f086e20ac0a657009bcfe43a (diff)
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>
-rw-r--r--kernel/gcov/fs.c2
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);
};
/**