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pidfs: switch to copy_struct_to_user()

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We have a helper that deals with all the required logic.

Link: https://lore.kernel.org/r/20250305-work-pidfs-kill_on_last_close-v3-1-c8c3d8361705@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-03-05 11:08:11 +01:00
parent b1e809e7f6
commit 816b2e6020
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1 changed files with 1 additions and 4 deletions
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fs/pidfs.c
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@ -276,10 +276,7 @@ static long pidfd_info(struct task_struct *task, unsigned int cmd, unsigned long
* userspace knows about will be copied. If userspace provides a new
* struct, only the bits that the kernel knows about will be copied.
*/
if (copy_to_user(uinfo, &kinfo, min(usize, sizeof(kinfo))))
return -EFAULT;
return 0;
return copy_struct_to_user(uinfo, usize, &kinfo, sizeof(kinfo), NULL);
}
static bool pidfs_ioctl_valid(unsigned int cmd)