[PATCH v2 12/25] selinux: add hooks for fscaps operations
From: "Seth Forshee (DigitalOcean)" <sforshee@kernel.org>
Date: 2024-02-21 21:25:06
Also in:
b4-sent, linux-doc, linux-fsdevel, linux-integrity, linux-unionfs, lkml, selinux
Subsystem:
selinux security module, the rest · Maintainers:
Paul Moore, Stephen Smalley, Linus Torvalds
Add hooks for set/get/remove fscaps operations which perform the same checks as the xattr hooks would have done for XATTR_NAME_CAPS. Signed-off-by: Seth Forshee (DigitalOcean) <sforshee@kernel.org> --- security/selinux/hooks.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index a6bf90ace84c..da129a387b34 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c@@ -3367,6 +3367,29 @@ static int selinux_inode_removexattr(struct mnt_idmap *idmap, return -EACCES; } +static int selinux_inode_set_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry, + const struct vfs_caps *caps, int flags) +{ + return dentry_has_perm(current_cred(), dentry, FILE__SETATTR); +} + +static int selinux_inode_get_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry) +{ + return dentry_has_perm(current_cred(), dentry, FILE__GETATTR); +} + +static int selinux_inode_remove_fscaps(struct mnt_idmap *idmap, + struct dentry *dentry) +{ + int rc = cap_inode_removexattr(idmap, dentry, XATTR_NAME_CAPS); + if (rc) + return rc; + + return dentry_has_perm(current_cred(), dentry, FILE__SETATTR); +} + static int selinux_path_notify(const struct path *path, u64 mask, unsigned int obj_type) {
@@ -7165,6 +7188,9 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { LSM_HOOK_INIT(inode_set_acl, selinux_inode_set_acl), LSM_HOOK_INIT(inode_get_acl, selinux_inode_get_acl), LSM_HOOK_INIT(inode_remove_acl, selinux_inode_remove_acl), + LSM_HOOK_INIT(inode_set_fscaps, selinux_inode_set_fscaps), + LSM_HOOK_INIT(inode_get_fscaps, selinux_inode_get_fscaps), + LSM_HOOK_INIT(inode_remove_fscaps, selinux_inode_remove_fscaps), LSM_HOOK_INIT(inode_getsecurity, selinux_inode_getsecurity), LSM_HOOK_INIT(inode_setsecurity, selinux_inode_setsecurity), LSM_HOOK_INIT(inode_listsecurity, selinux_inode_listsecurity),
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2.43.0