| Message ID | 20191224235939.7483-10-casey@schaufler-ca.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | LSM: Module stacking for AppArmor | expand |
On 12/24/19 6:59 PM, Casey Schaufler wrote: > Change the security_task_getsecid() interface to fill in > a lsmblob structure instead of a u32 secid in support of > LSM stacking. Audit interfaces will need to collect all > possible secids for possible reporting. > > Reviewed-by: Kees Cook <keescook@chromium.org> > Reviewed-by: John Johansen <john.johansen@canonical.com> > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> You can drop one of your SOBs and add my Ack, Acked-by: Stephen Smalley <sds@tycho.nsa.gov> > cc: linux-integrity@vger.kernel.org > --- > drivers/android/binder.c | 4 +-- > include/linux/security.h | 7 +++-- > kernel/audit.c | 11 +++---- > kernel/auditfilter.c | 4 +-- > kernel/auditsc.c | 18 ++++++++---- > net/netlabel/netlabel_unlabeled.c | 5 +++- > net/netlabel/netlabel_user.h | 6 +++- > security/integrity/ima/ima_appraise.c | 9 +++--- > security/integrity/ima/ima_main.c | 42 +++++++++++++++------------ > security/security.c | 12 ++++++-- > 10 files changed, 71 insertions(+), 47 deletions(-) > > diff --git a/drivers/android/binder.c b/drivers/android/binder.c > index f9b67f585e06..22fef6e130df 100644 > --- a/drivers/android/binder.c > +++ b/drivers/android/binder.c > @@ -3104,12 +3104,10 @@ static void binder_transaction(struct binder_proc *proc, > t->priority = task_nice(current); > > if (target_node && target_node->txn_security_ctx) { > - u32 secid; > struct lsmblob blob; > size_t added_size; > > - security_task_getsecid(proc->tsk, &secid); > - lsmblob_init(&blob, secid); > + security_task_getsecid(proc->tsk, &blob); > ret = security_secid_to_secctx(&blob, &secctx, &secctx_sz); > if (ret) { > return_error = BR_FAILED_REPLY; > diff --git a/include/linux/security.h b/include/linux/security.h > index 61a80afbbdba..b6d5475f8196 100644 > --- a/include/linux/security.h > +++ b/include/linux/security.h > @@ -449,7 +449,7 @@ int security_task_fix_setuid(struct cred *new, const struct cred *old, > int security_task_setpgid(struct task_struct *p, pid_t pgid); > int security_task_getpgid(struct task_struct *p); > int security_task_getsid(struct task_struct *p); > -void security_task_getsecid(struct task_struct *p, u32 *secid); > +void security_task_getsecid(struct task_struct *p, struct lsmblob *blob); > int security_task_setnice(struct task_struct *p, int nice); > int security_task_setioprio(struct task_struct *p, int ioprio); > int security_task_getioprio(struct task_struct *p); > @@ -1101,9 +1101,10 @@ static inline int security_task_getsid(struct task_struct *p) > return 0; > } > > -static inline void security_task_getsecid(struct task_struct *p, u32 *secid) > +static inline void security_task_getsecid(struct task_struct *p, > + struct lsmblob *blob) > { > - *secid = 0; > + lsmblob_init(blob, 0); > } > > static inline int security_task_setnice(struct task_struct *p, int nice) > diff --git a/kernel/audit.c b/kernel/audit.c > index e3e515158295..6ee53e43c986 100644 > --- a/kernel/audit.c > +++ b/kernel/audit.c > @@ -2062,14 +2062,12 @@ int audit_log_task_context(struct audit_buffer *ab) > char *ctx = NULL; > unsigned len; > int error; > - u32 sid; > struct lsmblob blob; > > - security_task_getsecid(current, &sid); > - if (!sid) > + security_task_getsecid(current, &blob); > + if (!lsmblob_is_set(&blob)) > return 0; > > - lsmblob_init(&blob, sid); > error = security_secid_to_secctx(&blob, &ctx, &len); > if (error) { > if (error != -EINVAL) > @@ -2277,6 +2275,7 @@ int audit_set_loginuid(kuid_t loginuid) > int audit_signal_info(int sig, struct task_struct *t) > { > kuid_t uid = current_uid(), auid; > + struct lsmblob blob; > > if (auditd_test_task(t) && > (sig == SIGTERM || sig == SIGHUP || > @@ -2287,7 +2286,9 @@ int audit_signal_info(int sig, struct task_struct *t) > audit_sig_uid = auid; > else > audit_sig_uid = uid; > - security_task_getsecid(current, &audit_sig_sid); > + security_task_getsecid(current, &blob); > + /* scaffolding until audit_sig_sid is converted */ > + audit_sig_sid = blob.secid[0]; > } > > return audit_signal_info_syscall(t); > diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c > index 356db1dd276c..19cfbe716f9d 100644 > --- a/kernel/auditfilter.c > +++ b/kernel/auditfilter.c > @@ -1324,7 +1324,6 @@ int audit_filter(int msgtype, unsigned int listtype) > for (i = 0; i < e->rule.field_count; i++) { > struct audit_field *f = &e->rule.fields[i]; > pid_t pid; > - u32 sid; > struct lsmblob blob; > > switch (f->type) { > @@ -1355,8 +1354,7 @@ int audit_filter(int msgtype, unsigned int listtype) > case AUDIT_SUBJ_SEN: > case AUDIT_SUBJ_CLR: > if (f->lsm_rule) { > - security_task_getsecid(current, &sid); > - lsmblob_init(&blob, sid); > + security_task_getsecid(current, &blob); > result = security_audit_rule_match( > &blob, f->type, > f->op, f->lsm_rule); > diff --git a/kernel/auditsc.c b/kernel/auditsc.c > index ce8bf2d8f8d2..cccb681ad081 100644 > --- a/kernel/auditsc.c > +++ b/kernel/auditsc.c > @@ -444,7 +444,6 @@ static int audit_filter_rules(struct task_struct *tsk, > { > const struct cred *cred; > int i, need_sid = 1; > - u32 sid; > struct lsmblob blob; > unsigned int sessionid; > > @@ -641,10 +640,9 @@ static int audit_filter_rules(struct task_struct *tsk, > logged upon error */ > if (f->lsm_rule) { > if (need_sid) { > - security_task_getsecid(tsk, &sid); > + security_task_getsecid(tsk, &blob); > need_sid = 0; > } > - lsmblob_init(&blob, sid); > result = security_audit_rule_match(&blob, > f->type, > f->op, > @@ -2382,12 +2380,15 @@ int __audit_sockaddr(int len, void *a) > void __audit_ptrace(struct task_struct *t) > { > struct audit_context *context = audit_context(); > + struct lsmblob blob; > > context->target_pid = task_tgid_nr(t); > context->target_auid = audit_get_loginuid(t); > context->target_uid = task_uid(t); > context->target_sessionid = audit_get_sessionid(t); > - security_task_getsecid(t, &context->target_sid); > + security_task_getsecid(t, &blob); > + /* scaffolding - until target_sid is converted */ > + context->target_sid = blob.secid[0]; > memcpy(context->target_comm, t->comm, TASK_COMM_LEN); > } > > @@ -2403,6 +2404,7 @@ int audit_signal_info_syscall(struct task_struct *t) > struct audit_aux_data_pids *axp; > struct audit_context *ctx = audit_context(); > kuid_t t_uid = task_uid(t); > + struct lsmblob blob; > > if (!audit_signals || audit_dummy_context()) > return 0; > @@ -2414,7 +2416,9 @@ int audit_signal_info_syscall(struct task_struct *t) > ctx->target_auid = audit_get_loginuid(t); > ctx->target_uid = t_uid; > ctx->target_sessionid = audit_get_sessionid(t); > - security_task_getsecid(t, &ctx->target_sid); > + security_task_getsecid(t, &blob); > + /* scaffolding until target_sid is converted */ > + ctx->target_sid = blob.secid[0]; > memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN); > return 0; > } > @@ -2435,7 +2439,9 @@ int audit_signal_info_syscall(struct task_struct *t) > axp->target_auid[axp->pid_count] = audit_get_loginuid(t); > axp->target_uid[axp->pid_count] = t_uid; > axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t); > - security_task_getsecid(t, &axp->target_sid[axp->pid_count]); > + security_task_getsecid(t, &blob); > + /* scaffolding until target_sid is converted */ > + axp->target_sid[axp->pid_count] = blob.secid[0]; > memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN); > axp->pid_count++; > > diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c > index 0cda17cb44a0..e279b81d9545 100644 > --- a/net/netlabel/netlabel_unlabeled.c > +++ b/net/netlabel/netlabel_unlabeled.c > @@ -1539,11 +1539,14 @@ int __init netlbl_unlabel_defconf(void) > int ret_val; > struct netlbl_dom_map *entry; > struct netlbl_audit audit_info; > + struct lsmblob blob; > > /* Only the kernel is allowed to call this function and the only time > * it is called is at bootup before the audit subsystem is reporting > * messages so don't worry to much about these values. */ > - security_task_getsecid(current, &audit_info.secid); > + security_task_getsecid(current, &blob); > + /* scaffolding until audit_info.secid is converted */ > + audit_info.secid = blob.secid[0]; > audit_info.loginuid = GLOBAL_ROOT_UID; > audit_info.sessionid = 0; > > diff --git a/net/netlabel/netlabel_user.h b/net/netlabel/netlabel_user.h > index 3c67afce64f1..438b5db6c714 100644 > --- a/net/netlabel/netlabel_user.h > +++ b/net/netlabel/netlabel_user.h > @@ -34,7 +34,11 @@ > static inline void netlbl_netlink_auditinfo(struct sk_buff *skb, > struct netlbl_audit *audit_info) > { > - security_task_getsecid(current, &audit_info->secid); > + struct lsmblob blob; > + > + security_task_getsecid(current, &blob); > + /* scaffolding until secid is converted */ > + audit_info->secid = blob.secid[0]; > audit_info->loginuid = audit_get_loginuid(current); > audit_info->sessionid = audit_get_sessionid(current); > } > diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c > index 300c8d2943c5..37f540af45bb 100644 > --- a/security/integrity/ima/ima_appraise.c > +++ b/security/integrity/ima/ima_appraise.c > @@ -48,14 +48,15 @@ bool is_ima_appraise_enabled(void) > */ > int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func) > { > - u32 secid; > + struct lsmblob blob; > > if (!ima_appraise) > return 0; > > - security_task_getsecid(current, &secid); > - return ima_match_policy(inode, current_cred(), secid, func, mask, > - IMA_APPRAISE | IMA_HASH, NULL, NULL); > + security_task_getsecid(current, &blob); > + /* scaffolding the .secid[0] */ > + return ima_match_policy(inode, current_cred(), blob.secid[0], func, > + mask, IMA_APPRAISE | IMA_HASH, NULL, NULL); > } > > static int ima_fix_xattr(struct dentry *dentry, > diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c > index d7e987baf127..7c4bfc051ebc 100644 > --- a/security/integrity/ima/ima_main.c > +++ b/security/integrity/ima/ima_main.c > @@ -384,12 +384,13 @@ static int process_measurement(struct file *file, const struct cred *cred, > */ > int ima_file_mmap(struct file *file, unsigned long prot) > { > - u32 secid; > + struct lsmblob blob; > > if (file && (prot & PROT_EXEC)) { > - security_task_getsecid(current, &secid); > - return process_measurement(file, current_cred(), secid, NULL, > - 0, MAY_EXEC, MMAP_CHECK); > + security_task_getsecid(current, &blob); > + /* scaffolding - until process_measurement changes */ > + return process_measurement(file, current_cred(), blob.secid[0], > + NULL, 0, MAY_EXEC, MMAP_CHECK); > } > > return 0; > @@ -412,10 +413,12 @@ int ima_bprm_check(struct linux_binprm *bprm) > { > int ret; > u32 secid; > + struct lsmblob blob; > > - security_task_getsecid(current, &secid); > - ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0, > - MAY_EXEC, BPRM_CHECK); > + security_task_getsecid(current, &blob); > + /* scaffolding until process_measurement changes */ > + ret = process_measurement(bprm->file, current_cred(), blob.secid[0], > + NULL, 0, MAY_EXEC, BPRM_CHECK); > if (ret) > return ret; > > @@ -436,10 +439,11 @@ int ima_bprm_check(struct linux_binprm *bprm) > */ > int ima_file_check(struct file *file, int mask) > { > - u32 secid; > + struct lsmblob blob; > > - security_task_getsecid(current, &secid); > - return process_measurement(file, current_cred(), secid, NULL, 0, > + security_task_getsecid(current, &blob); > + /* scaffolding until process_measurement changes */ > + return process_measurement(file, current_cred(), blob.secid[0], NULL, 0, > mask & (MAY_READ | MAY_WRITE | MAY_EXEC | > MAY_APPEND), FILE_CHECK); > } > @@ -548,7 +552,7 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, > enum kernel_read_file_id read_id) > { > enum ima_hooks func; > - u32 secid; > + struct lsmblob blob; > > if (!file && read_id == READING_FIRMWARE) { > if ((ima_appraise & IMA_APPRAISE_FIRMWARE) && > @@ -570,9 +574,10 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, > } > > func = read_idmap[read_id] ?: FILE_CHECK; > - security_task_getsecid(current, &secid); > - return process_measurement(file, current_cred(), secid, buf, size, > - MAY_READ, func); > + security_task_getsecid(current, &blob); > + /* scaffolding until process_measurement changes */ > + return process_measurement(file, current_cred(), blob.secid[0], buf, > + size, MAY_READ, func); > } > > /** > @@ -653,7 +658,7 @@ void process_buffer_measurement(const void *buf, int size, > } hash = {}; > int violation = 0; > int action = 0; > - u32 secid; > + struct lsmblob blob; > > /* > * Both LSM hooks and auxilary based buffer measurements are > @@ -663,9 +668,10 @@ void process_buffer_measurement(const void *buf, int size, > * buffer measurements. > */ > if (func) { > - security_task_getsecid(current, &secid); > - action = ima_get_action(NULL, current_cred(), secid, 0, func, > - &pcr, &template); > + security_task_getsecid(current, &blob); > + /* scaffolding */ > + action = ima_get_action(NULL, current_cred(), blob.secid[0], > + 0, func, &pcr, &template); > if (!(action & IMA_MEASURE)) > return; > } > diff --git a/security/security.c b/security/security.c > index 793c4ee0cf4e..7a170c02f8df 100644 > --- a/security/security.c > +++ b/security/security.c > @@ -1700,10 +1700,16 @@ int security_task_getsid(struct task_struct *p) > return call_int_hook(task_getsid, 0, p); > } > > -void security_task_getsecid(struct task_struct *p, u32 *secid) > +void security_task_getsecid(struct task_struct *p, struct lsmblob *blob) > { > - *secid = 0; > - call_void_hook(task_getsecid, p, secid); > + struct security_hook_list *hp; > + > + lsmblob_init(blob, 0); > + hlist_for_each_entry(hp, &security_hook_heads.task_getsecid, list) { > + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) > + continue; > + hp->hook.task_getsecid(p, &blob->secid[hp->lsmid->slot]); > + } > } > EXPORT_SYMBOL(security_task_getsecid); > >
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index f9b67f585e06..22fef6e130df 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -3104,12 +3104,10 @@ static void binder_transaction(struct binder_proc *proc, t->priority = task_nice(current); if (target_node && target_node->txn_security_ctx) { - u32 secid; struct lsmblob blob; size_t added_size; - security_task_getsecid(proc->tsk, &secid); - lsmblob_init(&blob, secid); + security_task_getsecid(proc->tsk, &blob); ret = security_secid_to_secctx(&blob, &secctx, &secctx_sz); if (ret) { return_error = BR_FAILED_REPLY; diff --git a/include/linux/security.h b/include/linux/security.h index 61a80afbbdba..b6d5475f8196 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -449,7 +449,7 @@ int security_task_fix_setuid(struct cred *new, const struct cred *old, int security_task_setpgid(struct task_struct *p, pid_t pgid); int security_task_getpgid(struct task_struct *p); int security_task_getsid(struct task_struct *p); -void security_task_getsecid(struct task_struct *p, u32 *secid); +void security_task_getsecid(struct task_struct *p, struct lsmblob *blob); int security_task_setnice(struct task_struct *p, int nice); int security_task_setioprio(struct task_struct *p, int ioprio); int security_task_getioprio(struct task_struct *p); @@ -1101,9 +1101,10 @@ static inline int security_task_getsid(struct task_struct *p) return 0; } -static inline void security_task_getsecid(struct task_struct *p, u32 *secid) +static inline void security_task_getsecid(struct task_struct *p, + struct lsmblob *blob) { - *secid = 0; + lsmblob_init(blob, 0); } static inline int security_task_setnice(struct task_struct *p, int nice) diff --git a/kernel/audit.c b/kernel/audit.c index e3e515158295..6ee53e43c986 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2062,14 +2062,12 @@ int audit_log_task_context(struct audit_buffer *ab) char *ctx = NULL; unsigned len; int error; - u32 sid; struct lsmblob blob; - security_task_getsecid(current, &sid); - if (!sid) + security_task_getsecid(current, &blob); + if (!lsmblob_is_set(&blob)) return 0; - lsmblob_init(&blob, sid); error = security_secid_to_secctx(&blob, &ctx, &len); if (error) { if (error != -EINVAL) @@ -2277,6 +2275,7 @@ int audit_set_loginuid(kuid_t loginuid) int audit_signal_info(int sig, struct task_struct *t) { kuid_t uid = current_uid(), auid; + struct lsmblob blob; if (auditd_test_task(t) && (sig == SIGTERM || sig == SIGHUP || @@ -2287,7 +2286,9 @@ int audit_signal_info(int sig, struct task_struct *t) audit_sig_uid = auid; else audit_sig_uid = uid; - security_task_getsecid(current, &audit_sig_sid); + security_task_getsecid(current, &blob); + /* scaffolding until audit_sig_sid is converted */ + audit_sig_sid = blob.secid[0]; } return audit_signal_info_syscall(t); diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c index 356db1dd276c..19cfbe716f9d 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -1324,7 +1324,6 @@ int audit_filter(int msgtype, unsigned int listtype) for (i = 0; i < e->rule.field_count; i++) { struct audit_field *f = &e->rule.fields[i]; pid_t pid; - u32 sid; struct lsmblob blob; switch (f->type) { @@ -1355,8 +1354,7 @@ int audit_filter(int msgtype, unsigned int listtype) case AUDIT_SUBJ_SEN: case AUDIT_SUBJ_CLR: if (f->lsm_rule) { - security_task_getsecid(current, &sid); - lsmblob_init(&blob, sid); + security_task_getsecid(current, &blob); result = security_audit_rule_match( &blob, f->type, f->op, f->lsm_rule); diff --git a/kernel/auditsc.c b/kernel/auditsc.c index ce8bf2d8f8d2..cccb681ad081 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -444,7 +444,6 @@ static int audit_filter_rules(struct task_struct *tsk, { const struct cred *cred; int i, need_sid = 1; - u32 sid; struct lsmblob blob; unsigned int sessionid; @@ -641,10 +640,9 @@ static int audit_filter_rules(struct task_struct *tsk, logged upon error */ if (f->lsm_rule) { if (need_sid) { - security_task_getsecid(tsk, &sid); + security_task_getsecid(tsk, &blob); need_sid = 0; } - lsmblob_init(&blob, sid); result = security_audit_rule_match(&blob, f->type, f->op, @@ -2382,12 +2380,15 @@ int __audit_sockaddr(int len, void *a) void __audit_ptrace(struct task_struct *t) { struct audit_context *context = audit_context(); + struct lsmblob blob; context->target_pid = task_tgid_nr(t); context->target_auid = audit_get_loginuid(t); context->target_uid = task_uid(t); context->target_sessionid = audit_get_sessionid(t); - security_task_getsecid(t, &context->target_sid); + security_task_getsecid(t, &blob); + /* scaffolding - until target_sid is converted */ + context->target_sid = blob.secid[0]; memcpy(context->target_comm, t->comm, TASK_COMM_LEN); } @@ -2403,6 +2404,7 @@ int audit_signal_info_syscall(struct task_struct *t) struct audit_aux_data_pids *axp; struct audit_context *ctx = audit_context(); kuid_t t_uid = task_uid(t); + struct lsmblob blob; if (!audit_signals || audit_dummy_context()) return 0; @@ -2414,7 +2416,9 @@ int audit_signal_info_syscall(struct task_struct *t) ctx->target_auid = audit_get_loginuid(t); ctx->target_uid = t_uid; ctx->target_sessionid = audit_get_sessionid(t); - security_task_getsecid(t, &ctx->target_sid); + security_task_getsecid(t, &blob); + /* scaffolding until target_sid is converted */ + ctx->target_sid = blob.secid[0]; memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN); return 0; } @@ -2435,7 +2439,9 @@ int audit_signal_info_syscall(struct task_struct *t) axp->target_auid[axp->pid_count] = audit_get_loginuid(t); axp->target_uid[axp->pid_count] = t_uid; axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t); - security_task_getsecid(t, &axp->target_sid[axp->pid_count]); + security_task_getsecid(t, &blob); + /* scaffolding until target_sid is converted */ + axp->target_sid[axp->pid_count] = blob.secid[0]; memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN); axp->pid_count++; diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index 0cda17cb44a0..e279b81d9545 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -1539,11 +1539,14 @@ int __init netlbl_unlabel_defconf(void) int ret_val; struct netlbl_dom_map *entry; struct netlbl_audit audit_info; + struct lsmblob blob; /* Only the kernel is allowed to call this function and the only time * it is called is at bootup before the audit subsystem is reporting * messages so don't worry to much about these values. */ - security_task_getsecid(current, &audit_info.secid); + security_task_getsecid(current, &blob); + /* scaffolding until audit_info.secid is converted */ + audit_info.secid = blob.secid[0]; audit_info.loginuid = GLOBAL_ROOT_UID; audit_info.sessionid = 0; diff --git a/net/netlabel/netlabel_user.h b/net/netlabel/netlabel_user.h index 3c67afce64f1..438b5db6c714 100644 --- a/net/netlabel/netlabel_user.h +++ b/net/netlabel/netlabel_user.h @@ -34,7 +34,11 @@ static inline void netlbl_netlink_auditinfo(struct sk_buff *skb, struct netlbl_audit *audit_info) { - security_task_getsecid(current, &audit_info->secid); + struct lsmblob blob; + + security_task_getsecid(current, &blob); + /* scaffolding until secid is converted */ + audit_info->secid = blob.secid[0]; audit_info->loginuid = audit_get_loginuid(current); audit_info->sessionid = audit_get_sessionid(current); } diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 300c8d2943c5..37f540af45bb 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -48,14 +48,15 @@ bool is_ima_appraise_enabled(void) */ int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func) { - u32 secid; + struct lsmblob blob; if (!ima_appraise) return 0; - security_task_getsecid(current, &secid); - return ima_match_policy(inode, current_cred(), secid, func, mask, - IMA_APPRAISE | IMA_HASH, NULL, NULL); + security_task_getsecid(current, &blob); + /* scaffolding the .secid[0] */ + return ima_match_policy(inode, current_cred(), blob.secid[0], func, + mask, IMA_APPRAISE | IMA_HASH, NULL, NULL); } static int ima_fix_xattr(struct dentry *dentry, diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index d7e987baf127..7c4bfc051ebc 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -384,12 +384,13 @@ static int process_measurement(struct file *file, const struct cred *cred, */ int ima_file_mmap(struct file *file, unsigned long prot) { - u32 secid; + struct lsmblob blob; if (file && (prot & PROT_EXEC)) { - security_task_getsecid(current, &secid); - return process_measurement(file, current_cred(), secid, NULL, - 0, MAY_EXEC, MMAP_CHECK); + security_task_getsecid(current, &blob); + /* scaffolding - until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], + NULL, 0, MAY_EXEC, MMAP_CHECK); } return 0; @@ -412,10 +413,12 @@ int ima_bprm_check(struct linux_binprm *bprm) { int ret; u32 secid; + struct lsmblob blob; - security_task_getsecid(current, &secid); - ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0, - MAY_EXEC, BPRM_CHECK); + security_task_getsecid(current, &blob); + /* scaffolding until process_measurement changes */ + ret = process_measurement(bprm->file, current_cred(), blob.secid[0], + NULL, 0, MAY_EXEC, BPRM_CHECK); if (ret) return ret; @@ -436,10 +439,11 @@ int ima_bprm_check(struct linux_binprm *bprm) */ int ima_file_check(struct file *file, int mask) { - u32 secid; + struct lsmblob blob; - security_task_getsecid(current, &secid); - return process_measurement(file, current_cred(), secid, NULL, 0, + security_task_getsecid(current, &blob); + /* scaffolding until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], NULL, 0, mask & (MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND), FILE_CHECK); } @@ -548,7 +552,7 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, enum kernel_read_file_id read_id) { enum ima_hooks func; - u32 secid; + struct lsmblob blob; if (!file && read_id == READING_FIRMWARE) { if ((ima_appraise & IMA_APPRAISE_FIRMWARE) && @@ -570,9 +574,10 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, } func = read_idmap[read_id] ?: FILE_CHECK; - security_task_getsecid(current, &secid); - return process_measurement(file, current_cred(), secid, buf, size, - MAY_READ, func); + security_task_getsecid(current, &blob); + /* scaffolding until process_measurement changes */ + return process_measurement(file, current_cred(), blob.secid[0], buf, + size, MAY_READ, func); } /** @@ -653,7 +658,7 @@ void process_buffer_measurement(const void *buf, int size, } hash = {}; int violation = 0; int action = 0; - u32 secid; + struct lsmblob blob; /* * Both LSM hooks and auxilary based buffer measurements are @@ -663,9 +668,10 @@ void process_buffer_measurement(const void *buf, int size, * buffer measurements. */ if (func) { - security_task_getsecid(current, &secid); - action = ima_get_action(NULL, current_cred(), secid, 0, func, - &pcr, &template); + security_task_getsecid(current, &blob); + /* scaffolding */ + action = ima_get_action(NULL, current_cred(), blob.secid[0], + 0, func, &pcr, &template); if (!(action & IMA_MEASURE)) return; } diff --git a/security/security.c b/security/security.c index 793c4ee0cf4e..7a170c02f8df 100644 --- a/security/security.c +++ b/security/security.c @@ -1700,10 +1700,16 @@ int security_task_getsid(struct task_struct *p) return call_int_hook(task_getsid, 0, p); } -void security_task_getsecid(struct task_struct *p, u32 *secid) +void security_task_getsecid(struct task_struct *p, struct lsmblob *blob) { - *secid = 0; - call_void_hook(task_getsecid, p, secid); + struct security_hook_list *hp; + + lsmblob_init(blob, 0); + hlist_for_each_entry(hp, &security_hook_heads.task_getsecid, list) { + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) + continue; + hp->hook.task_getsecid(p, &blob->secid[hp->lsmid->slot]); + } } EXPORT_SYMBOL(security_task_getsecid);