| Message ID | 20250307183701.16970-7-casey@schaufler-ca.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Delegated to: | Paul Moore |
| Headers | show |
| Series | [v2,1/6] Audit: Create audit_stamp structure | expand |
Hi Casey, kernel test robot noticed the following build errors: [auto build test ERROR on pcmoore-selinux/next] [also build test ERROR on linus/master v6.14-rc5 next-20250307] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Casey-Schaufler/Audit-Create-audit_stamp-structure/20250308-024950 base: https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git next patch link: https://lore.kernel.org/r/20250307183701.16970-7-casey%40schaufler-ca.com patch subject: [PATCH v2 6/6] Audit: Add record for multiple object contexts config: x86_64-kexec (https://download.01.org/0day-ci/archive/20250309/202503092246.du8fixfZ-lkp@intel.com/config) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250309/202503092246.du8fixfZ-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202503092246.du8fixfZ-lkp@intel.com/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: lsm_objctx_cnt >>> referenced by audit.c:2312 (kernel/audit.c:2312) >>> vmlinux.o:(audit_log_object_context) -- >> ld.lld: error: undefined symbol: lsm_active_cnt >>> referenced by audit.c:2329 (kernel/audit.c:2329) >>> vmlinux.o:(audit_log_object_context) >>> referenced by audit.c:2329 (kernel/audit.c:2329) >>> vmlinux.o:(audit_log_object_context) -- >> ld.lld: error: undefined symbol: lsm_idlist >>> referenced by audit.c:2330 (kernel/audit.c:2330) >>> vmlinux.o:(audit_log_object_context)
Hi Casey, kernel test robot noticed the following build errors: [auto build test ERROR on pcmoore-selinux/next] [also build test ERROR on linus/master v6.14-rc6 next-20250307] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Casey-Schaufler/Audit-Create-audit_stamp-structure/20250308-024950 base: https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git next patch link: https://lore.kernel.org/r/20250307183701.16970-7-casey%40schaufler-ca.com patch subject: [PATCH v2 6/6] Audit: Add record for multiple object contexts config: s390-randconfig-r073-20250310 (https://download.01.org/0day-ci/archive/20250310/202503101524.XYSVbXHw-lkp@intel.com/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250310/202503101524.XYSVbXHw-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202503101524.XYSVbXHw-lkp@intel.com/ All errors (new ones prefixed by >>): s390x-linux-ld: kernel/audit.o: in function `audit_log_object_context': >> kernel/audit.c:2312:(.text+0x2da6): undefined reference to `lsm_objctx_cnt' >> s390x-linux-ld: kernel/audit.c:2329:(.text+0x30d2): undefined reference to `lsm_active_cnt' s390x-linux-ld: kernel/audit.c:(.text+0x3108): undefined reference to `lsm_active_cnt' >> s390x-linux-ld: kernel/audit.c:2330:(.text+0x313e): undefined reference to `lsm_idlist' >> s390x-linux-ld: kernel/audit.c:2312:(.text+0x32f2): undefined reference to `lsm_objctx_cnt' s390x-linux-ld: kernel/audit.c:2312:(.text+0x330a): undefined reference to `lsm_objctx_cnt' s390x-linux-ld: kernel/audit.c:2329:(.text+0x33a4): undefined reference to `lsm_active_cnt' s390x-linux-ld: kernel/audit.c:2329:(.text+0x33bc): undefined reference to `lsm_active_cnt' vim +2312 kernel/audit.c 2303 2304 int audit_log_object_context(struct audit_buffer *ab, struct lsm_prop *prop) 2305 { 2306 int i; 2307 int rc; 2308 int error = 0; 2309 char *space = ""; 2310 struct lsm_context context; 2311 > 2312 if (lsm_objctx_cnt < 2) { 2313 error = security_lsmprop_to_secctx(prop, &context, 2314 LSM_ID_UNDEF); 2315 if (error < 0) { 2316 if (error != -EINVAL) 2317 goto error_path; 2318 return error; 2319 } 2320 audit_log_format(ab, " obj=%s", context.context); 2321 security_release_secctx(&context); 2322 return 0; 2323 } 2324 audit_log_format(ab, " obj=?"); 2325 error = audit_buffer_aux_new(ab, AUDIT_MAC_OBJ_CONTEXTS); 2326 if (error) 2327 goto error_path; 2328 > 2329 for (i = 0; i < lsm_active_cnt; i++) { > 2330 if (!lsm_idlist[i]->objctx) 2331 continue; 2332 rc = security_lsmprop_to_secctx(prop, &context, 2333 lsm_idlist[i]->id); 2334 if (rc < 0) { 2335 audit_log_format(ab, "%sobj_%s=?", space, 2336 lsm_idlist[i]->name); 2337 if (rc != -EINVAL) 2338 audit_panic("error in audit_log_object_context"); 2339 error = rc; 2340 } else { 2341 audit_log_format(ab, "%sobj_%s=%s", space, 2342 lsm_idlist[i]->name, context.context); 2343 security_release_secctx(&context); 2344 } 2345 space = " "; 2346 } 2347 2348 audit_buffer_aux_end(ab); 2349 return error; 2350 2351 error_path: 2352 audit_panic("error in audit_log_object_context"); 2353 return error; 2354 } 2355
Hi Casey,
kernel test robot noticed the following build warnings:
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Casey-Schaufler/Audit-Create-audit_stamp-structure/20250308-024950
base: https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git next
patch link: https://lore.kernel.org/r/20250307183701.16970-7-casey%40schaufler-ca.com
patch subject: [PATCH v2 6/6] Audit: Add record for multiple object contexts
config: powerpc64-randconfig-r073-20250309 (https://download.01.org/0day-ci/archive/20250310/202503100802.Dqju4qc5-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 14.2.0
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
| Closes: https://lore.kernel.org/r/202503100802.Dqju4qc5-lkp@intel.com/
smatch warnings:
kernel/auditsc.c:1753 audit_log_exit() warn: if statement not indented
vim +1753 kernel/auditsc.c
e54dc2431d740a Amy Griffis 2007-03-29 1749 for (aux = context->aux_pids; aux; aux = aux->next) {
e54dc2431d740a Amy Griffis 2007-03-29 1750 struct audit_aux_data_pids *axs = (void *)aux;
e54dc2431d740a Amy Griffis 2007-03-29 1751
e54dc2431d740a Amy Griffis 2007-03-29 1752 for (i = 0; i < axs->pid_count; i++)
e54dc2431d740a Amy Griffis 2007-03-29 @1753 if (audit_log_pid_context(context, axs->target_pid[i],
c2a7780efe37d0 Eric Paris 2008-01-07 1754 axs->target_auid[i],
c2a7780efe37d0 Eric Paris 2008-01-07 1755 axs->target_uid[i],
4746ec5b01ed07 Eric Paris 2008-01-08 1756 axs->target_sessionid[i],
13d826e564e2cc Casey Schaufler 2024-10-09 1757 &axs->target_ref[i],
c2a7780efe37d0 Eric Paris 2008-01-07 1758 axs->target_comm[i]))
e54dc2431d740a Amy Griffis 2007-03-29 1759 call_panic = 1;
This should be indented another tab.
a5cb013da773a6 Al Viro 2007-03-20 1760 }
a5cb013da773a6 Al Viro 2007-03-20 1761
e54dc2431d740a Amy Griffis 2007-03-29 1762 if (context->target_pid &&
e54dc2431d740a Amy Griffis 2007-03-29 1763 audit_log_pid_context(context, context->target_pid,
c2a7780efe37d0 Eric Paris 2008-01-07 1764 context->target_auid, context->target_uid,
4746ec5b01ed07 Eric Paris 2008-01-08 1765 context->target_sessionid,
On Mar 7, 2025 Casey Schaufler <casey@schaufler-ca.com> wrote: > > Create a new audit record AUDIT_MAC_OBJ_CONTEXTS. > An example of the MAC_OBJ_CONTEXTS (1424) record is: > > type=MAC_OBJ_CONTEXTS[1424] > msg=audit(1601152467.009:1050): > obj_selinux=unconfined_u:object_r:user_home_t:s0 > > When an audit event includes a AUDIT_MAC_OBJ_CONTEXTS record > the "obj=" field in other records in the event will be "obj=?". > An AUDIT_MAC_OBJ_CONTEXTS record is supplied when the system has > multiple security modules that may make access decisions based > on an object security context. > > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> > --- > include/linux/audit.h | 7 ++++- > include/linux/lsm_hooks.h | 3 +++ > include/linux/security.h | 1 + > include/uapi/linux/audit.h | 1 + > kernel/audit.c | 53 +++++++++++++++++++++++++++++++++++++- > kernel/auditsc.c | 45 ++++++++------------------------ > security/security.c | 3 +++ > security/selinux/hooks.c | 1 + > security/smack/smack_lsm.c | 1 + > 9 files changed, 79 insertions(+), 36 deletions(-) > > diff --git a/include/linux/audit.h b/include/linux/audit.h > index ee3e2ce70c45..0b17acf459f2 100644 > --- a/include/linux/audit.h > +++ b/include/linux/audit.h > @@ -186,8 +186,10 @@ extern void audit_log_path_denied(int type, > const char *operation); > extern void audit_log_lost(const char *message); > > +extern int audit_log_object_context(struct audit_buffer *ab, > + struct lsm_prop *prop); Less is more, "audit_log_obj_ctx()" to match "audit_log_subj_ctx()". > extern int audit_log_subject_context(struct audit_buffer *ab, > - struct lsm_prop *blob); > + struct lsm_prop *prop); Do that back in patch 5/6 please. > diff --git a/kernel/audit.c b/kernel/audit.c > index f0c1f0c0b250..054776f29327 100644 > --- a/kernel/audit.c > +++ b/kernel/audit.c > @@ -1116,7 +1116,6 @@ static int is_audit_feature_set(int i) > return af.features & AUDIT_FEATURE_TO_MASK(i); > } > > - > static int audit_get_feature(struct sk_buff *skb) > { > u32 seq; > @@ -2302,6 +2301,58 @@ int audit_log_task_context(struct audit_buffer *ab) > } > EXPORT_SYMBOL(audit_log_task_context); > > +int audit_log_object_context(struct audit_buffer *ab, struct lsm_prop *prop) > +{ > + int i; > + int rc; > + int error = 0; > + char *space = ""; > + struct lsm_context context; > + > + if (lsm_objctx_cnt < 2) { > + error = security_lsmprop_to_secctx(prop, &context, > + LSM_ID_UNDEF); > + if (error < 0) { > + if (error != -EINVAL) > + goto error_path; > + return error; > + } > + audit_log_format(ab, " obj=%s", context.context); > + security_release_secctx(&context); > + return 0; > + } > + audit_log_format(ab, " obj=?"); > + error = audit_buffer_aux_new(ab, AUDIT_MAC_OBJ_CONTEXTS); > + if (error) > + goto error_path; > + > + for (i = 0; i < lsm_active_cnt; i++) { > + if (!lsm_idlist[i]->objctx) > + continue; > + rc = security_lsmprop_to_secctx(prop, &context, > + lsm_idlist[i]->id); > + if (rc < 0) { > + audit_log_format(ab, "%sobj_%s=?", space, > + lsm_idlist[i]->name); > + if (rc != -EINVAL) > + audit_panic("error in audit_log_object_context"); > + error = rc; > + } else { > + audit_log_format(ab, "%sobj_%s=%s", space, > + lsm_idlist[i]->name, context.context); > + security_release_secctx(&context); > + } > + space = " "; > + } > + > + audit_buffer_aux_end(ab); > + return error; > + > +error_path: > + audit_panic("error in audit_log_object_context"); > + return error; > +} Let's follow the same code pattern as suggested for the subject. > diff --git a/kernel/auditsc.c b/kernel/auditsc.c > index d98ce7097a2d..82470862ea81 100644 > --- a/kernel/auditsc.c > +++ b/kernel/auditsc.c > @@ -1780,15 +1756,16 @@ static void audit_log_exit(void) > axs->target_sessionid[i], > &axs->target_ref[i], > axs->target_comm[i])) > - call_panic = 1; > + call_panic = 1; > } > > if (context->target_pid && > audit_log_pid_context(context, context->target_pid, > context->target_auid, context->target_uid, > context->target_sessionid, > - &context->target_ref, context->target_comm)) > - call_panic = 1; > + &context->target_ref, > + context->target_comm)) > + call_panic = 1; Thank you for both of the indent fixes above. -- paul-moore.com
diff --git a/include/linux/audit.h b/include/linux/audit.h index ee3e2ce70c45..0b17acf459f2 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -186,8 +186,10 @@ extern void audit_log_path_denied(int type, const char *operation); extern void audit_log_lost(const char *message); +extern int audit_log_object_context(struct audit_buffer *ab, + struct lsm_prop *prop); extern int audit_log_subject_context(struct audit_buffer *ab, - struct lsm_prop *blob); + struct lsm_prop *prop); extern int audit_log_task_context(struct audit_buffer *ab); extern void audit_log_task_info(struct audit_buffer *ab); @@ -248,6 +250,9 @@ static inline void audit_log_key(struct audit_buffer *ab, char *key) { } static inline void audit_log_path_denied(int type, const char *operation) { } +static inline void audit_log_object_context(struct audit_buffer *ab, + struct lsm_prop *prop) +{ } static inline int audit_log_subject_context(struct audit_buffer *ab, struct lsm_prop *prop) { diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index e4d303ab1f20..464bd8ef4045 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -75,6 +75,8 @@ struct lsm_static_calls_table { * struct lsm_id - Identify a Linux Security Module. * @lsm: name of the LSM, must be approved by the LSM maintainers * @id: LSM ID number from uapi/linux/lsm.h + * @subjctx: true if LSM supports a subject context + * @objctx: true if LSM supports an object context * * Contains the information that identifies the LSM. */ @@ -82,6 +84,7 @@ struct lsm_id { const char *name; u64 id; bool subjctx; + bool objctx; }; /* diff --git a/include/linux/security.h b/include/linux/security.h index 79a9bf4a7cdd..7c1a6d99e148 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -169,6 +169,7 @@ struct lsm_prop { extern const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1]; extern u32 lsm_active_cnt; extern u32 lsm_subjctx_cnt; +extern u32 lsm_objctx_cnt; extern const struct lsm_id *lsm_idlist[]; /* These functions are in security/commoncap.c */ diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 5ebb5d80363d..8ca58144bcc6 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -147,6 +147,7 @@ #define AUDIT_IPE_CONFIG_CHANGE 1421 /* IPE config change */ #define AUDIT_IPE_POLICY_LOAD 1422 /* IPE policy load */ #define AUDIT_MAC_TASK_CONTEXTS 1423 /* Multiple LSM task contexts */ +#define AUDIT_MAC_OBJ_CONTEXTS 1424 /* Multiple LSM objext contexts */ #define AUDIT_FIRST_KERN_ANOM_MSG 1700 #define AUDIT_LAST_KERN_ANOM_MSG 1799 diff --git a/kernel/audit.c b/kernel/audit.c index f0c1f0c0b250..054776f29327 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1116,7 +1116,6 @@ static int is_audit_feature_set(int i) return af.features & AUDIT_FEATURE_TO_MASK(i); } - static int audit_get_feature(struct sk_buff *skb) { u32 seq; @@ -2302,6 +2301,58 @@ int audit_log_task_context(struct audit_buffer *ab) } EXPORT_SYMBOL(audit_log_task_context); +int audit_log_object_context(struct audit_buffer *ab, struct lsm_prop *prop) +{ + int i; + int rc; + int error = 0; + char *space = ""; + struct lsm_context context; + + if (lsm_objctx_cnt < 2) { + error = security_lsmprop_to_secctx(prop, &context, + LSM_ID_UNDEF); + if (error < 0) { + if (error != -EINVAL) + goto error_path; + return error; + } + audit_log_format(ab, " obj=%s", context.context); + security_release_secctx(&context); + return 0; + } + audit_log_format(ab, " obj=?"); + error = audit_buffer_aux_new(ab, AUDIT_MAC_OBJ_CONTEXTS); + if (error) + goto error_path; + + for (i = 0; i < lsm_active_cnt; i++) { + if (!lsm_idlist[i]->objctx) + continue; + rc = security_lsmprop_to_secctx(prop, &context, + lsm_idlist[i]->id); + if (rc < 0) { + audit_log_format(ab, "%sobj_%s=?", space, + lsm_idlist[i]->name); + if (rc != -EINVAL) + audit_panic("error in audit_log_object_context"); + error = rc; + } else { + audit_log_format(ab, "%sobj_%s=%s", space, + lsm_idlist[i]->name, context.context); + security_release_secctx(&context); + } + space = " "; + } + + audit_buffer_aux_end(ab); + return error; + +error_path: + audit_panic("error in audit_log_object_context"); + return error; +} + void audit_log_d_path_exe(struct audit_buffer *ab, struct mm_struct *mm) { diff --git a/kernel/auditsc.c b/kernel/auditsc.c index d98ce7097a2d..82470862ea81 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -1098,7 +1098,6 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid, char *comm) { struct audit_buffer *ab; - struct lsm_context ctx; int rc = 0; ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID); @@ -1108,15 +1107,9 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid, audit_log_format(ab, "opid=%d oauid=%d ouid=%d oses=%d", pid, from_kuid(&init_user_ns, auid), from_kuid(&init_user_ns, uid), sessionid); - if (lsmprop_is_set(prop)) { - if (security_lsmprop_to_secctx(prop, &ctx, LSM_ID_UNDEF) < 0) { - audit_log_format(ab, " obj=(none)"); - rc = 1; - } else { - audit_log_format(ab, " obj=%s", ctx.context); - security_release_secctx(&ctx); - } - } + if (lsmprop_is_set(prop) && audit_log_object_context(ab, prop)) + rc = 1; + audit_log_format(ab, " ocomm="); audit_log_untrustedstring(ab, comm); audit_log_end(ab); @@ -1392,16 +1385,8 @@ static void show_special(struct audit_context *context, int *call_panic) from_kgid(&init_user_ns, context->ipc.gid), context->ipc.mode); if (lsmprop_is_set(&context->ipc.oprop)) { - struct lsm_context lsmctx; - - if (security_lsmprop_to_secctx(&context->ipc.oprop, - &lsmctx, - LSM_ID_UNDEF) < 0) { + if (audit_log_object_context(ab, &context->ipc.oprop)) *call_panic = 1; - } else { - audit_log_format(ab, " obj=%s", lsmctx.context); - security_release_secctx(&lsmctx); - } } if (context->ipc.has_perm) { audit_log_end(ab); @@ -1558,18 +1543,9 @@ static void audit_log_name(struct audit_context *context, struct audit_names *n, from_kgid(&init_user_ns, n->gid), MAJOR(n->rdev), MINOR(n->rdev)); - if (lsmprop_is_set(&n->oprop)) { - struct lsm_context ctx; - - if (security_lsmprop_to_secctx(&n->oprop, &ctx, - LSM_ID_UNDEF) < 0) { - if (call_panic) - *call_panic = 2; - } else { - audit_log_format(ab, " obj=%s", ctx.context); - security_release_secctx(&ctx); - } - } + if (lsmprop_is_set(&n->oprop) && + audit_log_object_context(ab, &n->oprop)) + *call_panic = 2; /* log the audit_names record type */ switch (n->type) { @@ -1780,15 +1756,16 @@ static void audit_log_exit(void) axs->target_sessionid[i], &axs->target_ref[i], axs->target_comm[i])) - call_panic = 1; + call_panic = 1; } if (context->target_pid && audit_log_pid_context(context, context->target_pid, context->target_auid, context->target_uid, context->target_sessionid, - &context->target_ref, context->target_comm)) - call_panic = 1; + &context->target_ref, + context->target_comm)) + call_panic = 1; if (context->pwd.dentry && context->pwd.mnt) { ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD); diff --git a/security/security.c b/security/security.c index 8450cc5f82d5..ed48457f8f24 100644 --- a/security/security.c +++ b/security/security.c @@ -321,6 +321,7 @@ static void __init initialize_lsm(struct lsm_info *lsm) */ u32 lsm_active_cnt __ro_after_init; u32 lsm_subjctx_cnt __ro_after_init; +u32 lsm_objctx_cnt __ro_after_init; const struct lsm_id *lsm_idlist[MAX_LSM_COUNT]; /* Populate ordered LSMs list from comma-separated LSM name list. */ @@ -629,6 +630,8 @@ void __init security_add_hooks(struct security_hook_list *hooks, int count, lsm_idlist[lsm_active_cnt++] = lsmid; if (lsmid->subjctx) lsm_subjctx_cnt++; + if (lsmid->objctx) + lsm_objctx_cnt++; } for (i = 0; i < count; i++) { diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 1e2e1545eb2e..10b13cd589c5 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -7143,6 +7143,7 @@ static const struct lsm_id selinux_lsmid = { .name = "selinux", .id = LSM_ID_SELINUX, .subjctx = true, + .objctx = true, }; /* diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 75bd62fe1513..1b42ac32d815 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -5058,6 +5058,7 @@ static const struct lsm_id smack_lsmid = { .name = "smack", .id = LSM_ID_SMACK, .subjctx = true, + .objctx = true, }; static struct security_hook_list smack_hooks[] __ro_after_init = {
Create a new audit record AUDIT_MAC_OBJ_CONTEXTS. An example of the MAC_OBJ_CONTEXTS (1424) record is: type=MAC_OBJ_CONTEXTS[1424] msg=audit(1601152467.009:1050): obj_selinux=unconfined_u:object_r:user_home_t:s0 When an audit event includes a AUDIT_MAC_OBJ_CONTEXTS record the "obj=" field in other records in the event will be "obj=?". An AUDIT_MAC_OBJ_CONTEXTS record is supplied when the system has multiple security modules that may make access decisions based on an object security context. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> --- include/linux/audit.h | 7 ++++- include/linux/lsm_hooks.h | 3 +++ include/linux/security.h | 1 + include/uapi/linux/audit.h | 1 + kernel/audit.c | 53 +++++++++++++++++++++++++++++++++++++- kernel/auditsc.c | 45 ++++++++------------------------ security/security.c | 3 +++ security/selinux/hooks.c | 1 + security/smack/smack_lsm.c | 1 + 9 files changed, 79 insertions(+), 36 deletions(-)