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Hermes SMTP Server) with ESMTPA ID d02b3757abb6ec718247a44806490ae3; Tue, 08 Sep 2026 22:27:27 +0000 (UTC) Message-ID: <312cbf15-71d7-4fac-bee4-67fd237c5f5b@schaufler-ca.com> Date: Tue, 8 Sep 2026 15:27:25 -0700 Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/2] lsm: expose mount idmaps to inode hooks To: Paul Moore , daan@amutable.com Cc: Christian Brauner , Jan Kara , Alexander Viro , linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org, Casey Schaufler References: <20260904-lsm-mount-idmaps-v3-0-920a1963675d@amutable.com> <20260904-lsm-mount-idmaps-v3-1-920a1963675d@amutable.com> Content-Language: en-US From: Casey Schaufler In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailer: WebService/1.1.26460 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo On 9/8/2026 3:05 PM, Paul Moore wrote: > On Fri, Sep 4, 2026 at 10:48 AM Daan De Meyer via B4 Relay > wrote: >> From: Daan De Meyer >> >> Pass the mount idmap through the create, link, symlink, mkdir, mknod, >> and permission hooks. Update the in-tree security implementations and >> non-VFS callers accordingly. >> >> Signed-off-by: Daan De Meyer >> --- >> fs/cachefiles/security.c | 4 +-- >> fs/namei.c | 18 +++++++------- >> include/linux/lsm_hook_defs.h | 23 +++++++++-------- >> include/linux/security.h | 58 +++++++++++++++++++++++++------------------ >> security/security.c | 40 +++++++++++++++++------------ >> security/selinux/hooks.c | 19 +++++++++----- >> security/smack/smack_lsm.c | 9 ++++--- >> 7 files changed, 100 insertions(+), 71 deletions(-) > Casey, are you okay with the Smack changes (below)? Yes, assuming the 80 character limit is adhered to. > >> diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c >> index 8e88ac65fd7f..a45819d13c0d 100644 >> --- a/security/smack/smack_lsm.c >> +++ b/security/smack/smack_lsm.c >> @@ -1089,14 +1089,15 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir, >> >> /** >> * smack_inode_link - Smack check on link >> + * @idmap: idmap of the mount >> * @old_dentry: the existing object >> * @dir: unused >> * @new_dentry: the new object >> * >> * Returns 0 if access is permitted, an error code otherwise >> */ >> -static int smack_inode_link(struct dentry *old_dentry, struct inode *dir, >> - struct dentry *new_dentry) >> +static int smack_inode_link(struct mnt_idmap *idmap, struct dentry *old_dentry, >> + struct inode *dir, struct dentry *new_dentry) >> { >> struct smack_known *isp; >> struct smk_audit_info ad; >> @@ -1226,6 +1227,7 @@ static int smack_inode_rename(struct inode *old_inode, >> >> /** >> * smack_inode_permission - Smack version of permission() >> + * @idmap: idmap of the mount >> * @inode: the inode in question >> * @mask: the access requested >> * >> @@ -1233,7 +1235,8 @@ static int smack_inode_rename(struct inode *old_inode, >> * >> * Returns 0 if access is permitted, an error code otherwise >> */ >> -static int smack_inode_permission(struct inode *inode, int mask) >> +static int smack_inode_permission(struct mnt_idmap *idmap, struct inode *inode, >> + int mask) >> { >> struct superblock_smack *sbsp = smack_superblock(inode->i_sb); >> struct smk_audit_info ad; >> >> -- >> 2.54.0