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author | Oleg Nesterov <oleg@redhat.com> | 2009-06-23 21:25:32 +0200 |
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committer | James Morris <jmorris@namei.org> | 2009-08-10 20:47:42 +1000 |
commit | 13f0feafa6b8aead57a2a328e2fca6a5828bf286 (patch) | |
tree | fb396118339319406daf7f6782782eaef31b3b53 /fs/proc/task_nommu.c | |
parent | f4b9a988685da6386d7f9a72df3098bcc3270526 (diff) | |
download | linux-stable-13f0feafa6b8aead57a2a328e2fca6a5828bf286.tar.gz linux-stable-13f0feafa6b8aead57a2a328e2fca6a5828bf286.tar.bz2 linux-stable-13f0feafa6b8aead57a2a328e2fca6a5828bf286.zip |
mm_for_maps: simplify, use ptrace_may_access()
It would be nice to kill __ptrace_may_access(). It requires task_lock(),
but this lock is only needed to read mm->flags in the middle.
Convert mm_for_maps() to use ptrace_may_access(), this also simplifies
the code a little bit.
Also, we do not need to take ->mmap_sem in advance. In fact I think
mm_for_maps() should not play with ->mmap_sem at all, the caller should
take this lock.
With or without this patch, without ->cred_guard_mutex held we can race
with exec() and get the new ->mm but check old creds.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'fs/proc/task_nommu.c')
0 files changed, 0 insertions, 0 deletions