> Add vmemdup_user() transformations to the memdup_user.cocci rule.
> Commit 50fd2f298bef ("new primitive: vmemdup_user()") introduced
> vmemdup_user(). The function uses kvmalloc with GPF_USER flag.
Such a software evolution is also interesting.
> +@depends on patch@
> +- to = \(kvmalloc\|kvzalloc\)(size,\(GFP_KERNEL\|GFP_USER\));
> ++ to = vmemdup_user(from,size);
How do you think about to achieve the desired data processing by the application
of a SmPL disjunction like the following?
to =
(
- \( kmalloc \| kzalloc \) (size, \( GFP_KERNEL \| GFP_USER \))
+ memdup_user(from, size)
|
- \( kvmalloc \| kvzalloc \) (size, \( GFP_KERNEL \| GFP_USER \))
+ vmemdup_user(from, size)
)
;
Unfortunately, the Coccinelle software does not like the following
SmPL code variant so far.
to =
(
- \( kmalloc \| kzalloc \)
+ memdup_user
|
- \( kvmalloc \| kvzalloc \)
+ vmemdup_user
)
(
- size, \( GFP_KERNEL \| GFP_USER \)
+ from, size
);
Message:
25: no available token to attach to
Regards,
Markus
