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| author | Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org> | 2021-06-25 20:36:55 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-25 10:53:26 -0700 |
| commit | 808e9df477757955a9644ca323010339be0c40ee (patch) | |
| tree | 3788dfa060a6d7be79d0a4a3d12697fa7b79b8ad | |
| parent | 55fcd4493da5ac8a0f7a0b3b5ae8448aee2041bb (diff) | |
| download | linux-808e9df477757955a9644ca323010339be0c40ee.tar.gz linux-808e9df477757955a9644ca323010339be0c40ee.tar.xz | |
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 <glebfm@altlinux.org>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Axel Rasmussen <axelrasmussen@google.com>
Reviewed-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/uapi/linux/userfaultfd.h | 4 |
1 files 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 { |