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author | 2018-11-01 23:07:24 +0000 | |
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committer | 2019-02-28 03:29:24 -0500 | |
commit | 442155c1bd84f82bff2d05d0ec4d0090df17ecfa (patch) | |
tree | cf02556d9bcc6ed826c6ae0cf99392bb57e7265a | |
parent | vfs: Add LSM hooks for the new mount API (diff) | |
download | linux-442155c1bd84f82bff2d05d0ec4d0090df17ecfa.tar.gz linux-442155c1bd84f82bff2d05d0ec4d0090df17ecfa.tar.bz2 linux-442155c1bd84f82bff2d05d0ec4d0090df17ecfa.zip |
selinux: Implement the new mount API LSM hooks
Implement the new mount API LSM hooks for SELinux. At some point the old
hooks will need to be removed.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Paul Moore <paul@paul-moore.com>
cc: Stephen Smalley <sds@tycho.nsa.gov>
cc: selinux@tycho.nsa.gov
cc: linux-security-module@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r-- | security/selinux/hooks.c | 49 | ||||
-rw-r--r-- | security/selinux/include/security.h | 10 |
2 files changed, 49 insertions, 10 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index f0e36c3492ba..f99381e97d73 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -48,6 +48,8 @@ #include <linux/fdtable.h> #include <linux/namei.h> #include <linux/mount.h> +#include <linux/fs_context.h> +#include <linux/fs_parser.h> #include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv6.h> #include <linux/tty.h> @@ -454,11 +456,11 @@ static inline int inode_doinit(struct inode *inode) enum { Opt_error = -1, - Opt_context = 1, + Opt_context = 0, + Opt_defcontext = 1, Opt_fscontext = 2, - Opt_defcontext = 3, - Opt_rootcontext = 4, - Opt_seclabel = 5, + Opt_rootcontext = 3, + Opt_seclabel = 4, }; #define A(s, has_arg) {#s, sizeof(#s) - 1, Opt_##s, has_arg} @@ -1089,6 +1091,7 @@ static int show_sid(struct seq_file *m, u32 sid) if (!rc) { bool has_comma = context && strchr(context, ','); + seq_putc(m, '='); if (has_comma) seq_putc(m, '\"'); seq_escape(m, context, "\"\n\\"); @@ -1142,7 +1145,7 @@ static int selinux_sb_show_options(struct seq_file *m, struct super_block *sb) } if (sbsec->flags & SBLABEL_MNT) { seq_putc(m, ','); - seq_puts(m, LABELSUPP_STR); + seq_puts(m, SECLABEL_STR); } return 0; } @@ -2761,6 +2764,38 @@ static int selinux_umount(struct vfsmount *mnt, int flags) FILESYSTEM__UNMOUNT, NULL); } +static const struct fs_parameter_spec selinux_param_specs[] = { + fsparam_string(CONTEXT_STR, Opt_context), + fsparam_string(DEFCONTEXT_STR, Opt_defcontext), + fsparam_string(FSCONTEXT_STR, Opt_fscontext), + fsparam_string(ROOTCONTEXT_STR, Opt_rootcontext), + fsparam_flag (SECLABEL_STR, Opt_seclabel), + {} +}; + +static const struct fs_parameter_description selinux_fs_parameters = { + .name = "SELinux", + .specs = selinux_param_specs, +}; + +static int selinux_fs_context_parse_param(struct fs_context *fc, + struct fs_parameter *param) +{ + struct fs_parse_result result; + int opt, rc; + + opt = fs_parse(fc, &selinux_fs_parameters, param, &result); + if (opt < 0) + return opt; + + rc = selinux_add_opt(opt, param->string, &fc->security); + if (!rc) { + param->string = NULL; + rc = 1; + } + return rc; +} + /* inode security operations */ static int selinux_inode_alloc_security(struct inode *inode) @@ -6710,6 +6745,8 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = { LSM_HOOK_INIT(bprm_committing_creds, selinux_bprm_committing_creds), LSM_HOOK_INIT(bprm_committed_creds, selinux_bprm_committed_creds), + LSM_HOOK_INIT(fs_context_parse_param, selinux_fs_context_parse_param), + LSM_HOOK_INIT(sb_alloc_security, selinux_sb_alloc_security), LSM_HOOK_INIT(sb_free_security, selinux_sb_free_security), LSM_HOOK_INIT(sb_eat_lsm_opts, selinux_sb_eat_lsm_opts), @@ -6978,6 +7015,8 @@ static __init int selinux_init(void) else pr_debug("SELinux: Starting in permissive mode\n"); + fs_validate_description(&selinux_fs_parameters); + return 0; } diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h index ba8eedf42b90..529d8941c9c5 100644 --- a/security/selinux/include/security.h +++ b/security/selinux/include/security.h @@ -59,11 +59,11 @@ #define SE_SBPROC 0x0200 #define SE_SBGENFS 0x0400 -#define CONTEXT_STR "context=" -#define FSCONTEXT_STR "fscontext=" -#define ROOTCONTEXT_STR "rootcontext=" -#define DEFCONTEXT_STR "defcontext=" -#define LABELSUPP_STR "seclabel" +#define CONTEXT_STR "context" +#define FSCONTEXT_STR "fscontext" +#define ROOTCONTEXT_STR "rootcontext" +#define DEFCONTEXT_STR "defcontext" +#define SECLABEL_STR "seclabel" struct netlbl_lsm_secattr; |