Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=425fb2b4bf5dde24be4a82e9a2c344bb49ac92e4
Commit: 425fb2b4bf5dde24be4a82e9a2c344bb49ac92e4
Parent: 198fe21b0a17fe9c68cb519ecc566534b04f122b
Author: Pavel Emelyanov <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 18 23:40:07 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Oct 19 11:53:39 2007 -0700
pid namespaces: move alloc_pid() lower in copy_process()
When we create new namespace we will need to allocate the struct pid, that
will have one extra struct upid in array, comparing to the parent.
Thus we need to know the new namespace (if any) in alloc_pid() to init this
struct upid properly, so move the alloc_pid() call lower in copy_process().
Signed-off-by: Pavel Emelyanov <[EMAIL PROTECTED]>
Cc: Oleg Nesterov <[EMAIL PROTECTED]>
Cc: Sukadev Bhattiprolu <[EMAIL PROTECTED]>
Cc: Paul Menage <[EMAIL PROTECTED]>
Cc: "Eric W. Biederman" <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
kernel/fork.c | 31 ++++++++++++++++---------------
1 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/kernel/fork.c b/kernel/fork.c
index 984d259..bab3419 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1040,16 +1040,9 @@ static struct task_struct *copy_process(unsigned long
clone_flags,
if (p->binfmt && !try_module_get(p->binfmt->module))
goto bad_fork_cleanup_put_domain;
- if (pid != &init_struct_pid) {
- pid = alloc_pid(task_active_pid_ns(p));
- if (!pid)
- goto bad_fork_put_binfmt_module;
- }
-
p->did_exec = 0;
delayacct_tsk_init(p); /* Must remain after dup_task_struct() */
copy_flags(clone_flags, p);
- p->pid = pid_nr(pid);
retval = -EFAULT;
if (clone_flags & CLONE_PARENT_SETTID)
if (put_user(p->pid, parent_tidptr))
@@ -1133,10 +1126,6 @@ static struct task_struct *copy_process(unsigned long
clone_flags,
p->blocked_on = NULL; /* not blocked yet */
#endif
- p->tgid = p->pid;
- if (clone_flags & CLONE_THREAD)
- p->tgid = current->tgid;
-
if ((retval = security_task_alloc(p)))
goto bad_fork_cleanup_policy;
if ((retval = audit_alloc(p)))
@@ -1162,6 +1151,18 @@ static struct task_struct *copy_process(unsigned long
clone_flags,
if (retval)
goto bad_fork_cleanup_namespaces;
+ if (pid != &init_struct_pid) {
+ retval = -ENOMEM;
+ pid = alloc_pid(task_active_pid_ns(p));
+ if (!pid)
+ goto bad_fork_cleanup_namespaces;
+ }
+
+ p->pid = pid_nr(pid);
+ p->tgid = p->pid;
+ if (clone_flags & CLONE_THREAD)
+ p->tgid = current->tgid;
+
p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr :
NULL;
/*
* Clear TID on mm_release()?
@@ -1259,7 +1260,7 @@ static struct task_struct *copy_process(unsigned long
clone_flags,
spin_unlock(¤t->sighand->siglock);
write_unlock_irq(&tasklist_lock);
retval = -ERESTARTNOINTR;
- goto bad_fork_cleanup_namespaces;
+ goto bad_fork_free_pid;
}
if (clone_flags & CLONE_THREAD) {
@@ -1308,6 +1309,9 @@ static struct task_struct *copy_process(unsigned long
clone_flags,
cgroup_post_fork(p);
return p;
+bad_fork_free_pid:
+ if (pid != &init_struct_pid)
+ free_pid(pid);
bad_fork_cleanup_namespaces:
exit_task_namespaces(p);
bad_fork_cleanup_keys:
@@ -1337,9 +1341,6 @@ bad_fork_cleanup_cgroup:
cgroup_exit(p, cgroup_callbacks_done);
bad_fork_cleanup_delays_binfmt:
delayacct_tsk_free(p);
- if (pid != &init_struct_pid)
- free_pid(pid);
-bad_fork_put_binfmt_module:
if (p->binfmt)
module_put(p->binfmt->module);
bad_fork_cleanup_put_domain:
-
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