Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] i3c: svc: Annotate struct svc_i3c_xfer with __counted_by | Date | Fri, 22 Sep 2023 10:50:23 -0700 |
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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 svc_i3c_xfer.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Miquel Raynal <miquel.raynal@bootlin.com> Cc: Conor Culhane <conor.culhane@silvaco.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: linux-i3c@lists.infradead.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/i3c/master/svc-i3c-master.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index 8f8295acdadb..32eca2d6caf0 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -143,7 +143,7 @@ struct svc_i3c_xfer { int ret; unsigned int type; unsigned int ncmds; - struct svc_i3c_cmd cmds[]; + struct svc_i3c_cmd cmds[] __counted_by(ncmds); }; struct svc_i3c_regs_save { -- 2.34.1
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