Messages in this thread Patch in this message | | | From | Dongsu Park <> | Subject | [PATCH 07/11] fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems | Date | Fri, 22 Dec 2017 15:32:31 +0100 |
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From: Seth Forshee <seth.forshee@canonical.com>
The user in control of a super block should be allowed to freeze and thaw it. Relax the restrictions on the FIFREEZE and FITHAW ioctls to require CAP_SYS_ADMIN in s_user_ns.
Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: Dongsu Park <dongsu@kinvolk.io> --- fs/ioctl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ioctl.c b/fs/ioctl.c index 5ace7efb..8c628a8d 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -549,7 +549,7 @@ static int ioctl_fsfreeze(struct file *filp) { struct super_block *sb = file_inode(filp)->i_sb; - if (!capable(CAP_SYS_ADMIN)) + if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) return -EPERM; /* If filesystem doesn't support freeze feature, return. */ @@ -566,7 +566,7 @@ static int ioctl_fsthaw(struct file *filp) { struct super_block *sb = file_inode(filp)->i_sb; - if (!capable(CAP_SYS_ADMIN)) + if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) return -EPERM; /* Thaw */ -- 2.13.6
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