From 467e9f4b5086a60a5cb2e032ccaf4a31abadc4c2 Mon Sep 17 00:00:00 2001 From: Cedric Le Goater Date: Sun, 15 Jul 2007 23:41:06 -0700 Subject: fix create_new_namespaces() return value dup_mnt_ns() and clone_uts_ns() return NULL on failure. This is wrong, create_new_namespaces() uses ERR_PTR() to catch an error. This means that the subsequent create_new_namespaces() will hit BUG_ON() in copy_mnt_ns() or copy_utsname(). Modify create_new_namespaces() to also use the errors returned by the copy_*_ns routines and not to systematically return ENOMEM. [oleg@tv-sign.ru: better changelog] Signed-off-by: Cedric Le Goater Cc: Serge E. Hallyn Cc: Badari Pulavarty Cc: Pavel Emelianov Cc: Herbert Poetzl Cc: Eric W. Biederman Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/nsproxy.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) (limited to 'kernel/nsproxy.c') diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index 5aa28e21948..15a6015a849 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -58,30 +58,41 @@ static struct nsproxy *create_new_namespaces(int flags, struct task_struct *tsk, struct fs_struct *new_fs) { struct nsproxy *new_nsp; + int err; new_nsp = clone_nsproxy(tsk->nsproxy); if (!new_nsp) return ERR_PTR(-ENOMEM); new_nsp->mnt_ns = copy_mnt_ns(flags, tsk->nsproxy->mnt_ns, new_fs); - if (IS_ERR(new_nsp->mnt_ns)) + if (IS_ERR(new_nsp->mnt_ns)) { + err = PTR_ERR(new_nsp->mnt_ns); goto out_ns; + } new_nsp->uts_ns = copy_utsname(flags, tsk->nsproxy->uts_ns); - if (IS_ERR(new_nsp->uts_ns)) + if (IS_ERR(new_nsp->uts_ns)) { + err = PTR_ERR(new_nsp->uts_ns); goto out_uts; + } new_nsp->ipc_ns = copy_ipcs(flags, tsk->nsproxy->ipc_ns); - if (IS_ERR(new_nsp->ipc_ns)) + if (IS_ERR(new_nsp->ipc_ns)) { + err = PTR_ERR(new_nsp->ipc_ns); goto out_ipc; + } new_nsp->pid_ns = copy_pid_ns(flags, tsk->nsproxy->pid_ns); - if (IS_ERR(new_nsp->pid_ns)) + if (IS_ERR(new_nsp->pid_ns)) { + err = PTR_ERR(new_nsp->pid_ns); goto out_pid; + } new_nsp->user_ns = copy_user_ns(flags, tsk->nsproxy->user_ns); - if (IS_ERR(new_nsp->user_ns)) + if (IS_ERR(new_nsp->user_ns)) { + err = PTR_ERR(new_nsp->user_ns); goto out_user; + } return new_nsp; @@ -99,7 +110,7 @@ out_uts: put_mnt_ns(new_nsp->mnt_ns); out_ns: kfree(new_nsp); - return ERR_PTR(-ENOMEM); + return ERR_PTR(err); } /* -- cgit v1.2.3-18-g5258