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| author | Vasiliy Kulikov <segooon@gmail.com> | 2010-10-28 13:39:02 +0200 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-10-29 20:02:25 +0200 |
| commit | 313e74412105c670ff8900ec8099a3a5df1fa83c (patch) | |
| tree | 43736d2d3eae7f65fd8c200f0b8bdf9fe9e38d6d /drivers/xen | |
| parent | xen/privcmd: make privcmd visible in domU (diff) | |
| download | linux-313e74412105c670ff8900ec8099a3a5df1fa83c.tar.xz linux-313e74412105c670ff8900ec8099a3a5df1fa83c.zip | |
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: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/xenfs/privcmd.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c index f80be7f6eb95..2eb04c842511 100644 --- a/drivers/xen/xenfs/privcmd.c +++ b/drivers/xen/xenfs/privcmd.c @@ -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); } |