copy_compat_iovec_from_user() only do unsafe_get_user(),
it only requires read access.
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
---
Resending with mm list in addition
lib/iov_iter.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 61228a6c69f8..fd9bd229d51d 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -1932,7 +1932,7 @@ static int copy_compat_iovec_from_user(struct iovec *iov,
(const struct compat_iovec __user *)uvec;
int ret = -EFAULT, i;
- if (!user_access_begin(uiov, nr_segs * sizeof(*uiov)))
+ if (!user_read_access_begin(uiov, nr_segs * sizeof(*uiov)))
return -EFAULT;
for (i = 0; i < nr_segs; i++) {
@@ -1953,7 +1953,7 @@ static int copy_compat_iovec_from_user(struct iovec *iov,
ret = 0;
uaccess_end:
- user_access_end();
+ user_read_access_end();
return ret;
}
--
2.25.0
