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| author | Takashi Iwai <tiwai@suse.de> | 2012-03-18 18:22:37 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-03-18 18:22:37 +0100 |
| commit | cb3f2adc03ab055b19c677a6283523861fafebdd (patch) | |
| tree | 59cfb6800f0635a4aec16c8e0da619f27e51ee79 /mm/process_vm_access.c | |
| parent | 44c76a960a62fcc46cbcaa0a22a34e666a729329 (diff) | |
| parent | 828006de1bddf83b6ecf03ec459c15f7c7c22db7 (diff) | |
| download | op-kernel-dev-cb3f2adc03ab055b19c677a6283523861fafebdd.zip op-kernel-dev-cb3f2adc03ab055b19c677a6283523861fafebdd.tar.gz | |
Merge branch 'topic/asoc' into for-linus
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 e920aa3..c20ff48 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, |
