diff options
| author | Kees Cook <keescook@chromium.org> | 2023-09-30 09:17:43 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-09-30 09:24:16 -0700 |
| commit | 8927e688e9e0ae625af6a917bace8cc9cac55677 (patch) | |
| tree | cfb2f9994d4e1319a5ac219c848c807a6f75f460 /drivers/input | |
| parent | 96609688ab8a8ec25c4eeced53e88e26cff4fb06 (diff) | |
| download | lwn-8927e688e9e0ae625af6a917bace8cc9cac55677.tar.gz lwn-8927e688e9e0ae625af6a917bace8cc9cac55677.zip | |
Input: evdev - annotate struct evdev_client 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 evdev_client.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922175027.work.563-kees@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/evdev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 95f90699d2b1..51e0c4954600 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -50,7 +50,7 @@ struct evdev_client { bool revoked; unsigned long *evmasks[EV_CNT]; unsigned int bufsize; - struct input_event buffer[]; + struct input_event buffer[] __counted_by(bufsize); }; static size_t evdev_get_mask_cnt(unsigned int type) |