diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2013-04-09 13:51:48 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2013-04-09 13:51:48 +0200 |
| commit | 67028154bebd0fae7f9b2d77a5cf7bcf5e3c8ef0 (patch) | |
| tree | 6daa84a14d91ba5dc9e926d5d291e56d28c1a13c /ipc/mqueue.c | |
| parent | 21cb7963aa4ba59efb293c6dea00e3fc291090f8 (diff) | |
| parent | 06993d6a8a51b90fc78c8c3cb7a81c9b4b88c683 (diff) | |
Merge tag 'omap-for-v3.10/board-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/boards
From Tony Lindgren <tony@atomide.com>:
Board related changes for v3.10 merge window. These are pretty
much all non-critical fixes for platform device initialization
that will be needed until we can drop the board-*.c files and
move to DT based boot.
* tag 'omap-for-v3.10/board-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP: board-4430sdp: Provide regulator to pwm-backlight
ARM: OMAP: zoom: Use pwm stack for lcd and keyboard backlight
ARM: OMAP2+: omap2plus_defconfig: Add support for BMP085 pressure sensor
omap2+: Remove useless Makefile line
omap2+: Remove useless Makefile line
ARM: OMAP: RX-51: add missing regulator supply definitions for lis3lv02d
ARM: OMAP1: fix omap_udc registration
Includes an update to Linux 3.9-rc6
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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 e5c4f609f22..e4e47f64744 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; |