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| author | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 01:27:46 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 01:27:46 +0200 |
| commit | 9b3539e0e545e4c2f338acfc1ce52033a6f5e7f7 (patch) | |
| tree | 5c56e4a208dbe7e985e59911e1a421a7c1ee024c /ipc/mqueue.c | |
| parent | 3d39019a1655d195a60a86ebf38f9da30bd83d03 (diff) | |
| parent | 1cd1c049271233deccfcc75123afa7f39a607f5a (diff) | |
| download | op-kernel-dev-9b3539e0e545e4c2f338acfc1ce52033a6f5e7f7.zip op-kernel-dev-9b3539e0e545e4c2f338acfc1ce52033a6f5e7f7.tar.gz | |
Merge branch 'mips-next-3.10' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next
Diffstat (limited to 'ipc/mqueue.c')
| -rw-r--r-- | ipc/mqueue.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index e5c4f60..e4e47f6 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -330,8 +330,16 @@ static struct dentry *mqueue_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - if (!(flags & MS_KERNMOUNT)) - data = current->nsproxy->ipc_ns; + if (!(flags & MS_KERNMOUNT)) { + struct ipc_namespace *ns = current->nsproxy->ipc_ns; + /* Don't allow mounting unless the caller has CAP_SYS_ADMIN + * over the ipc namespace. + */ + if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN)) + return ERR_PTR(-EPERM); + + data = ns; + } return mount_ns(fs_type, flags, data, mqueue_fill_super); } @@ -840,7 +848,8 @@ out_putfd: fd = error; } mutex_unlock(&root->d_inode->i_mutex); - mnt_drop_write(mnt); + if (!ro) + mnt_drop_write(mnt); out_putname: putname(name); return fd; |
