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i3c: svc: Annotate struct svc_i3c_xfer with __counted_by

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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>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230922175023.work.239-kees@kernel.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Kees Cook 2023-09-22 10:50:23 -07:00 committed by Alexandre Belloni
parent 751d377f0f
commit a8b163e184
1 changed files with 1 additions and 1 deletions
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drivers/i3c/master/svc-i3c-master.c
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@ -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 {