The patch titled
Subject: proc: use mm_access() instead of ptrace_may_access()
has been added to the -mm tree. Its filename is
proc-use-mm_access-instead-of-ptrace_may_access.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Subject: proc: use mm_access() instead of ptrace_may_access()
mm_access() handles this much better, and avoids some race conditions.
Signed-off-by: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/base.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff -puN fs/proc/base.c~proc-use-mm_access-instead-of-ptrace_may_access fs/proc/base.c
--- a/fs/proc/base.c~proc-use-mm_access-instead-of-ptrace_may_access
+++ a/fs/proc/base.c
@@ -2035,11 +2035,8 @@ static int map_files_d_revalidate(struct
if (!task)
goto out_notask;
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
- goto out;
-
- mm = get_task_mm(task);
- if (!mm)
+ mm = mm_access(task, PTRACE_MODE_READ);
+ if (IS_ERR_OR_NULL(mm))
goto out;
if (!dname_to_vma_addr(dentry, &vm_start, &vm_end)) {
_
Subject: Subject: proc: use mm_access() instead of ptrace_may_access()
Patches currently in -mm which might be from xiyou.wangcong@xxxxxxxxx are
linux-next.patch
cris-select-generic_atomic64.patch
proc-clean-up-proc-pid-environ-handling.patch
proc-unify-ptrace_may_access-locking-code.patch
proc-remove-mm_for_maps.patch
proc-use-mm_access-instead-of-ptrace_may_access.patch
proc-use-task_access_lock-instead-of-ptrace_may_access.patch
proc-use-is_err_or_null.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
