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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-01-30 13:35:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-01-30 13:35:18 -0800 |
| commit | 444f378b237a0f728f5c4aba752c08d13c209344 (patch) | |
| tree | 248fd00bb2e60cb0890fce38b6a66fed65f977e4 /kernel | |
| parent | 8c8c4bafc3a20a6fb9078315ff865bc42276f9ba (diff) | |
| download | kernel-common-444f378b237a0f728f5c4aba752c08d13c209344.tar.gz kernel-common-444f378b237a0f728f5c4aba752c08d13c209344.tar.bz2 kernel-common-444f378b237a0f728f5c4aba752c08d13c209344.zip | |
Revert "[PATCH] namespaces: fix exit race by splitting exit"
This reverts commit 7a238fcba0629b6f2edbcd37458bae56fcf36be5 in
preparation for a better and simpler fix proposed by Eric Biederman
(and fixed up by Serge Hallyn)
Acked-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/exit.c | 6 | ||||
| -rw-r--r-- | kernel/fork.c | 4 | ||||
| -rw-r--r-- | kernel/nsproxy.c | 16 |
3 files changed, 5 insertions, 21 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index a5bf5329ff97..35401720635b 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -396,7 +396,7 @@ void daemonize(const char *name, ...) current->fs = fs; atomic_inc(&fs->count); - put_and_finalize_nsproxy(current->nsproxy); + exit_task_namespaces(current); current->nsproxy = init_task.nsproxy; get_task_namespaces(current); @@ -853,7 +853,6 @@ static void exit_notify(struct task_struct *tsk) fastcall NORET_TYPE void do_exit(long code) { struct task_struct *tsk = current; - struct nsproxy *ns; int group_dead; profile_task_exit(tsk); @@ -939,9 +938,8 @@ fastcall NORET_TYPE void do_exit(long code) tsk->exit_code = code; proc_exit_connector(tsk); - ns = preexit_task_namespaces(tsk); exit_notify(tsk); - exit_task_namespaces(tsk, ns); + exit_task_namespaces(tsk); #ifdef CONFIG_NUMA mpol_free(tsk->mempolicy); tsk->mempolicy = NULL; diff --git a/kernel/fork.c b/kernel/fork.c index 4cf868458f06..fc723e595cd5 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1265,7 +1265,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, return p; bad_fork_cleanup_namespaces: - put_and_finalize_nsproxy(p->nsproxy); + exit_task_namespaces(p); bad_fork_cleanup_keys: exit_keys(p); bad_fork_cleanup_mm: @@ -1711,7 +1711,7 @@ asmlinkage long sys_unshare(unsigned long unshare_flags) } if (new_nsproxy) - put_and_finalize_nsproxy(new_nsproxy); + put_nsproxy(new_nsproxy); bad_unshare_cleanup_ipc: if (new_ipc) diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index 7b05bce75cde..f5b9ee6f6bbb 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -117,7 +117,7 @@ int copy_namespaces(int flags, struct task_struct *tsk) goto out_pid; out: - put_and_finalize_nsproxy(old_ns); + put_nsproxy(old_ns); return err; out_pid: @@ -135,20 +135,6 @@ out_ns: goto out; } -struct nsproxy *put_nsproxy(struct nsproxy *ns) -{ - if (ns) { - if (atomic_dec_and_test(&ns->count)) { - if (ns->mnt_ns) { - put_mnt_ns(ns->mnt_ns); - ns->mnt_ns = NULL; - } - return ns; - } - } - return NULL; -} - void free_nsproxy(struct nsproxy *ns) { if (ns->mnt_ns) |