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authorSeth Forshee <seth.forshee@canonical.com>2015-02-15 14:35:35 -0600
committerEric W. Biederman <ebiederm@xmission.com>2018-05-24 12:04:28 -0500
commitf3f1a18330ac1b717cd7a32adff38d965f365aa2 (patch)
tree9dc33f121860883e67be6e677099010659828fa1
parentb1d749c5c34112fab5902c43b2a37a0ba1e5f0f1 (diff)
fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems
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. Signed-off-by: Seth Forshee <seth.forshee@canonical.com> Acked-by: Christian Brauner <christian@brauner.io> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
-rw-r--r--fs/ioctl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 4823431d1c9d..b445b13fc59b 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 */