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authorKees Cook <keescook@chromium.org>2023-09-15 22:03:16 +0200
committerKees Cook <keescook@chromium.org>2023-10-02 18:48:52 +0200
commit150849c5e2630ddf29411bb5334a548cc10d4814 (patch)
tree9396a630da92c7c6a984555b836f378bc1e424b3 /drivers/block
parentusb: gadget: f_midi: Annotate struct f_midi with __counted_by (diff)
downloadlinux-150849c5e2630ddf29411bb5334a548cc10d4814.tar.xz
linux-150849c5e2630ddf29411bb5334a548cc10d4814.zip
drbd: Annotate struct fifo_buffer 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 fifo_buffer. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Lars Ellenberg <lars.ellenberg@linbit.com> Cc: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: drbd-dev@lists.linbit.com Cc: linux-block@vger.kernel.org Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20230915200316.never.707-kees@kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/drbd/drbd_int.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index a30a5ed811be..7eecc53fae3d 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -553,7 +553,7 @@ struct fifo_buffer {
unsigned int head_index;
unsigned int size;
int total; /* sum of all values */
- int values[];
+ int values[] __counted_by(size);
};
extern struct fifo_buffer *fifo_alloc(unsigned int fifo_size);