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| author | Cedric Le Goater <clg@fr.ibm.com> | 2007-07-15 23:41:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:47 -0700 |
| commit | 467e9f4b5086a60a5cb2e032ccaf4a31abadc4c2 (patch) | |
| tree | f21b3975db312e4cdee1d9d3622549de2648b7ff /kernel/nsproxy.c | |
| parent | 3e733f071e16bdad13a75eedb102e8941b09927e (diff) | |
| download | lwn-467e9f4b5086a60a5cb2e032ccaf4a31abadc4c2.tar.gz lwn-467e9f4b5086a60a5cb2e032ccaf4a31abadc4c2.zip | |
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 <clg@fr.ibm.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Pavel Emelianov <xemul@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/nsproxy.c')
| -rw-r--r-- | kernel/nsproxy.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index 5aa28e219487..15a6015a849d 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); } /* |