| Message ID | 20231221-lsm-fix-counted-by-v1-1-12cc27597cdf@kernel.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | lsm: Add a __counted_by() annotation to lsm_ctx.ctx | expand |
On Thu, Dec 21, 2023 at 3:39 PM Mark Brown <broonie@kernel.org> wrote: > > The ctx in struct lsm_ctx is an array of size ctx_len, tell the compiler > about this using __counted_by() where supported to improve the ability to > detect overflow issues. > > Reported-by: Aishwarya TCV <aishwarya.tcv@arm.com> > Signed-off-by: Mark Brown <broonie@kernel.org> > --- > include/uapi/linux/lsm.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h > index f0386880a78e..4150333d224f 100644 > --- a/include/uapi/linux/lsm.h > +++ b/include/uapi/linux/lsm.h > @@ -36,7 +36,7 @@ struct lsm_ctx { > __u64 flags; > __u64 len; > __u64 ctx_len; > - __u8 ctx[]; > + __u8 ctx[] __counted_by(ctx_len); > }; We also now need to include stddef.h in lsm.h for the __counted_by() macro, yes?
diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h index f0386880a78e..4150333d224f 100644 --- a/include/uapi/linux/lsm.h +++ b/include/uapi/linux/lsm.h @@ -36,7 +36,7 @@ struct lsm_ctx { __u64 flags; __u64 len; __u64 ctx_len; - __u8 ctx[]; + __u8 ctx[] __counted_by(ctx_len); }; /*
The ctx in struct lsm_ctx is an array of size ctx_len, tell the compiler about this using __counted_by() where supported to improve the ability to detect overflow issues. Reported-by: Aishwarya TCV <aishwarya.tcv@arm.com> Signed-off-by: Mark Brown <broonie@kernel.org> --- include/uapi/linux/lsm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- base-commit: ec4e9d630a64df500641892f4e259e8149594a99 change-id: 20231221-lsm-fix-counted-by-f9fd827e26aa Best regards,