Commit 313e7441 authored by Vasiliy Kulikov's avatar Vasiliy Kulikov Committed by Jeremy Fitzhardinge

xen: xenfs: privcmd: check put_user() return code

put_user() may fail.  In this case propagate error code from
privcmd_ioctl_mmap_batch().
Signed-off-by: default avatarVasiliy Kulikov <segooon@gmail.com>
Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
parent 9387377e
......@@ -266,9 +266,7 @@ static int mmap_return_errors(void *data, void *state)
xen_pfn_t *mfnp = data;
struct mmap_batch_state *st = state;
put_user(*mfnp, st->user++);
return 0;
return put_user(*mfnp, st->user++);
}
static struct vm_operations_struct privcmd_vm_ops;
......@@ -323,10 +321,8 @@ static long privcmd_ioctl_mmap_batch(void __user *udata)
up_write(&mm->mmap_sem);
if (state.err > 0) {
ret = 0;
state.user = m.arr;
traverse_pages(m.num, sizeof(xen_pfn_t),
ret = traverse_pages(m.num, sizeof(xen_pfn_t),
&pagelist,
mmap_return_errors, &state);
}
......
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