From 808e9df477757955a9644ca323010339be0c40ee Mon Sep 17 00:00:00 2001 From: Gleb Fotengauer-Malinovskiy Date: Fri, 25 Jun 2021 20:36:55 +0300 Subject: [PATCH] userfaultfd: uapi: fix UFFDIO_CONTINUE ioctl request definition This ioctl request reads from uffdio_continue structure written by userspace which justifies _IOC_WRITE flag. It also writes back to that structure which justifies _IOC_READ flag. See NOTEs in include/uapi/asm-generic/ioctl.h for more information. Fixes: f619147104c8 ("userfaultfd: add UFFDIO_CONTINUE ioctl") Signed-off-by: Gleb Fotengauer-Malinovskiy Acked-by: Peter Xu Reviewed-by: Axel Rasmussen Reviewed-by: Dmitry V. Levin Signed-off-by: Linus Torvalds --- include/uapi/linux/userfaultfd.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/uapi/linux/userfaultfd.h b/include/uapi/linux/userfaultfd.h index bafbeb1a2624..650480f41f1d 100644 --- a/include/uapi/linux/userfaultfd.h +++ b/include/uapi/linux/userfaultfd.h @@ -80,8 +80,8 @@ struct uffdio_zeropage) #define UFFDIO_WRITEPROTECT _IOWR(UFFDIO, _UFFDIO_WRITEPROTECT, \ struct uffdio_writeprotect) -#define UFFDIO_CONTINUE _IOR(UFFDIO, _UFFDIO_CONTINUE, \ - struct uffdio_continue) +#define UFFDIO_CONTINUE _IOWR(UFFDIO, _UFFDIO_CONTINUE, \ + struct uffdio_continue) /* read() structure */ struct uffd_msg { -- 2.11.0