Messages in this thread | | | Date | Tue, 28 Feb 2023 17:52:40 +0100 | From | Oleg Nesterov <> | Subject | Re: [PATCH v12 2/3] ptrace,syscall_user_dispatch: checkpoint/restore support for SUD |
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On 02/27, Dmitry Safonov wrote: > > > +int syscall_user_dispatch_set_config(struct task_struct *task, unsigned long size, > > + void __user *data) > > +{ > > + int rc; > > + struct ptrace_sud_config cfg; > > + > > + if (size != sizeof(struct ptrace_sud_config)) > > + return -EINVAL; > > + > > + if (copy_from_user(&cfg, data, sizeof(struct ptrace_sud_config))) > > + return -EFAULT; > > It seems that the tool you want here would be copy_struct_from_user(), > which is designed for extendable syscalls.
Hmm. Why?
In this case ksize == usize, so why do we need copy_struct_from_user ?
Oleg.
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