diff options
| author | Tony Lindgren <tony@atomide.com> | 2012-02-17 15:08:20 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2012-02-17 15:08:20 -0800 |
| commit | b0ee4e394009f02a1d1b166091a19e8b842b4ea4 (patch) | |
| tree | 75e6df725e5402ed6fe9d78f23bf5cf45cfdf9d9 /mm/process_vm_access.c | |
| parent | abe763f2bccbc592d33a3a9c334acaefea022c0a (diff) | |
| parent | 03e4fd6eb25e6b46536ecdb0d1b7d33d46b15480 (diff) | |
Merge branch 'for_3.3/fixes/pm' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into fixes
Diffstat (limited to 'mm/process_vm_access.c')
| -rw-r--r-- | mm/process_vm_access.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index e920aa3ce104..c20ff48994c2 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -298,23 +298,18 @@ static ssize_t process_vm_rw_core(pid_t pid, const struct iovec *lvec, goto free_proc_pages; } - task_lock(task); - if (__ptrace_may_access(task, PTRACE_MODE_ATTACH)) { - task_unlock(task); - rc = -EPERM; - goto put_task_struct; - } - mm = task->mm; - - if (!mm || (task->flags & PF_KTHREAD)) { - task_unlock(task); - rc = -EINVAL; + mm = mm_access(task, PTRACE_MODE_ATTACH); + if (!mm || IS_ERR(mm)) { + rc = IS_ERR(mm) ? PTR_ERR(mm) : -ESRCH; + /* + * Explicitly map EACCES to EPERM as EPERM is a more a + * appropriate error code for process_vw_readv/writev + */ + if (rc == -EACCES) + rc = -EPERM; goto put_task_struct; } - atomic_inc(&mm->mm_users); - task_unlock(task); - for (i = 0; i < riovcnt && iov_l_curr_idx < liovcnt; i++) { rc = process_vm_rw_single_vec( (unsigned long)rvec[i].iov_base, rvec[i].iov_len, |