From: Richard Guy Briggs <rgb@redhat.com> To: containers@lists.linux-foundation.org, linux-api@vger.kernel.org, Linux-Audit Mailing List <linux-audit@redhat.com>, linux-fsdevel@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org Cc: Paul Moore <paul@paul-moore.com>, sgrubb@redhat.com, omosnace@redhat.com, dhowells@redhat.com, simo@redhat.com, eparis@parisplace.org, serge@hallyn.com, ebiederm@xmission.com, nhorman@tuxdriver.com, Richard Guy Briggs <rgb@redhat.com> Subject: [PATCH ghak90 V5 06/10] audit: add support for non-syscall auxiliary records Date: Fri, 15 Mar 2019 14:29:54 -0400 [thread overview] Message-ID: <700e4313571f86cc0cdcb7310fbe060f02c7c2db.1552665316.git.rgb@redhat.com> (raw) In-Reply-To: <cover.1552665316.git.rgb@redhat.com> In-Reply-To: <cover.1552665316.git.rgb@redhat.com> Standalone audit records have the timestamp and serial number generated on the fly and as such are unique, making them standalone. This new function audit_alloc_local() generates a local audit context that will be used only for a standalone record and its auxiliary record(s). The context is discarded immediately after the local associated records are produced. Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Acked-by: Serge Hallyn <serge@hallyn.com> --- include/linux/audit.h | 8 ++++++++ kernel/audit.h | 1 + kernel/auditsc.c | 35 ++++++++++++++++++++++++++++++----- 3 files changed, 39 insertions(+), 5 deletions(-) diff --git a/include/linux/audit.h b/include/linux/audit.h index ebd6625ca80e..6db5aba7cc01 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -285,6 +285,8 @@ static inline void audit_log_contid(struct audit_context *context, u64 contid) /* These are defined in auditsc.c */ /* Public API */ +extern struct audit_context *audit_alloc_local(gfp_t gfpflags); +extern void audit_free_context(struct audit_context *context); extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3); extern void __audit_syscall_exit(int ret_success, long ret_value); @@ -512,6 +514,12 @@ static inline void audit_fanotify(unsigned int response) extern int audit_n_rules; extern int audit_signals; #else /* CONFIG_AUDITSYSCALL */ +static inline struct audit_context *audit_alloc_local(gfp_t gfpflags) +{ + return NULL; +} +static inline void audit_free_context(struct audit_context *context) +{ } static inline void audit_syscall_entry(int major, unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3) diff --git a/kernel/audit.h b/kernel/audit.h index c5ac6436317e..2a1a8b8a8019 100644 --- a/kernel/audit.h +++ b/kernel/audit.h @@ -111,6 +111,7 @@ struct audit_proctitle { struct audit_context { int dummy; /* must be the first element */ int in_syscall; /* 1 if task is in a syscall */ + bool local; /* local context needed */ enum audit_state state, current_state; unsigned int serial; /* serial number for record */ int major; /* syscall number */ diff --git a/kernel/auditsc.c b/kernel/auditsc.c index f04e115df5dc..aa5d13b4fbbb 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -872,11 +872,13 @@ static inline void audit_free_aux(struct audit_context *context) } } -static inline struct audit_context *audit_alloc_context(enum audit_state state) +static inline struct audit_context *audit_alloc_context(enum audit_state state, + gfp_t gfpflags) { struct audit_context *context; - context = kzalloc(sizeof(*context), GFP_KERNEL); + /* We can be called in atomic context via audit_tg() */ + context = kzalloc(sizeof(*context), gfpflags); if (!context) return NULL; context->state = state; @@ -912,7 +914,8 @@ int audit_alloc_syscall(struct task_struct *tsk) return 0; } - if (!(context = audit_alloc_context(state))) { + context = audit_alloc_context(state, GFP_KERNEL); + if (!context) { kfree(key); audit_log_lost("out of memory in audit_alloc_syscall"); return -ENOMEM; @@ -924,8 +927,29 @@ int audit_alloc_syscall(struct task_struct *tsk) return 0; } -static inline void audit_free_context(struct audit_context *context) +struct audit_context *audit_alloc_local(gfp_t gfpflags) { + struct audit_context *context = NULL; + + if (!audit_ever_enabled) + goto out; /* Return if not auditing. */ + context = audit_alloc_context(AUDIT_RECORD_CONTEXT, gfpflags); + if (!context) { + audit_log_lost("out of memory in audit_alloc_local"); + goto out; + } + context->serial = audit_serial(); + ktime_get_coarse_real_ts64(&context->ctime); + context->local = true; +out: + return context; +} +EXPORT_SYMBOL(audit_alloc_local); + +void audit_free_context(struct audit_context *context) +{ + if (!context) + return; audit_free_names(context); unroll_tree_refs(context, NULL, 0); free_tree_refs(context); @@ -935,6 +959,7 @@ static inline void audit_free_context(struct audit_context *context) audit_proctitle_free(context); kfree(context); } +EXPORT_SYMBOL(audit_free_context); static int audit_log_pid_context(struct audit_context *context, pid_t pid, kuid_t auid, kuid_t uid, unsigned int sessionid, @@ -2163,7 +2188,7 @@ void __audit_inode_child(struct inode *parent, int auditsc_get_stamp(struct audit_context *ctx, struct timespec64 *t, unsigned int *serial) { - if (!ctx->in_syscall) + if (!ctx->in_syscall && !ctx->local) return 0; if (!ctx->serial) ctx->serial = audit_serial(); -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Richard Guy Briggs <rgb@redhat.com> To: containers@lists.linux-foundation.org, linux-api@vger.kernel.org, Linux-Audit Mailing List <linux-audit@redhat.com>, linux-fsdevel@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org Cc: nhorman@tuxdriver.com, Richard Guy Briggs <rgb@redhat.com>, dhowells@redhat.com, ebiederm@xmission.com, simo@redhat.com, eparis@parisplace.org, serge@hallyn.com Subject: [PATCH ghak90 V5 06/10] audit: add support for non-syscall auxiliary records Date: Fri, 15 Mar 2019 14:29:54 -0400 [thread overview] Message-ID: <700e4313571f86cc0cdcb7310fbe060f02c7c2db.1552665316.git.rgb@redhat.com> (raw) In-Reply-To: <cover.1552665316.git.rgb@redhat.com> In-Reply-To: <cover.1552665316.git.rgb@redhat.com> Standalone audit records have the timestamp and serial number generated on the fly and as such are unique, making them standalone. This new function audit_alloc_local() generates a local audit context that will be used only for a standalone record and its auxiliary record(s). The context is discarded immediately after the local associated records are produced. Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Acked-by: Serge Hallyn <serge@hallyn.com> --- include/linux/audit.h | 8 ++++++++ kernel/audit.h | 1 + kernel/auditsc.c | 35 ++++++++++++++++++++++++++++++----- 3 files changed, 39 insertions(+), 5 deletions(-) diff --git a/include/linux/audit.h b/include/linux/audit.h index ebd6625ca80e..6db5aba7cc01 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -285,6 +285,8 @@ static inline void audit_log_contid(struct audit_context *context, u64 contid) /* These are defined in auditsc.c */ /* Public API */ +extern struct audit_context *audit_alloc_local(gfp_t gfpflags); +extern void audit_free_context(struct audit_context *context); extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3); extern void __audit_syscall_exit(int ret_success, long ret_value); @@ -512,6 +514,12 @@ static inline void audit_fanotify(unsigned int response) extern int audit_n_rules; extern int audit_signals; #else /* CONFIG_AUDITSYSCALL */ +static inline struct audit_context *audit_alloc_local(gfp_t gfpflags) +{ + return NULL; +} +static inline void audit_free_context(struct audit_context *context) +{ } static inline void audit_syscall_entry(int major, unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3) diff --git a/kernel/audit.h b/kernel/audit.h index c5ac6436317e..2a1a8b8a8019 100644 --- a/kernel/audit.h +++ b/kernel/audit.h @@ -111,6 +111,7 @@ struct audit_proctitle { struct audit_context { int dummy; /* must be the first element */ int in_syscall; /* 1 if task is in a syscall */ + bool local; /* local context needed */ enum audit_state state, current_state; unsigned int serial; /* serial number for record */ int major; /* syscall number */ diff --git a/kernel/auditsc.c b/kernel/auditsc.c index f04e115df5dc..aa5d13b4fbbb 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -872,11 +872,13 @@ static inline void audit_free_aux(struct audit_context *context) } } -static inline struct audit_context *audit_alloc_context(enum audit_state state) +static inline struct audit_context *audit_alloc_context(enum audit_state state, + gfp_t gfpflags) { struct audit_context *context; - context = kzalloc(sizeof(*context), GFP_KERNEL); + /* We can be called in atomic context via audit_tg() */ + context = kzalloc(sizeof(*context), gfpflags); if (!context) return NULL; context->state = state; @@ -912,7 +914,8 @@ int audit_alloc_syscall(struct task_struct *tsk) return 0; } - if (!(context = audit_alloc_context(state))) { + context = audit_alloc_context(state, GFP_KERNEL); + if (!context) { kfree(key); audit_log_lost("out of memory in audit_alloc_syscall"); return -ENOMEM; @@ -924,8 +927,29 @@ int audit_alloc_syscall(struct task_struct *tsk) return 0; } -static inline void audit_free_context(struct audit_context *context) +struct audit_context *audit_alloc_local(gfp_t gfpflags) { + struct audit_context *context = NULL; + + if (!audit_ever_enabled) + goto out; /* Return if not auditing. */ + context = audit_alloc_context(AUDIT_RECORD_CONTEXT, gfpflags); + if (!context) { + audit_log_lost("out of memory in audit_alloc_local"); + goto out; + } + context->serial = audit_serial(); + ktime_get_coarse_real_ts64(&context->ctime); + context->local = true; +out: + return context; +} +EXPORT_SYMBOL(audit_alloc_local); + +void audit_free_context(struct audit_context *context) +{ + if (!context) + return; audit_free_names(context); unroll_tree_refs(context, NULL, 0); free_tree_refs(context); @@ -935,6 +959,7 @@ static inline void audit_free_context(struct audit_context *context) audit_proctitle_free(context); kfree(context); } +EXPORT_SYMBOL(audit_free_context); static int audit_log_pid_context(struct audit_context *context, pid_t pid, kuid_t auid, kuid_t uid, unsigned int sessionid, @@ -2163,7 +2188,7 @@ void __audit_inode_child(struct inode *parent, int auditsc_get_stamp(struct audit_context *ctx, struct timespec64 *t, unsigned int *serial) { - if (!ctx->in_syscall) + if (!ctx->in_syscall && !ctx->local) return 0; if (!ctx->serial) ctx->serial = audit_serial(); -- 1.8.3.1
next prev parent reply other threads:[~2019-03-15 18:34 UTC|newest] Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-15 18:29 [PATCH ghak90 V5 00/10] audit: implement container identifier Richard Guy Briggs 2019-03-15 18:29 ` [PATCH ghak90 V5 01/10] audit: collect audit task parameters Richard Guy Briggs 2019-03-16 19:57 ` Neil Horman 2019-03-27 20:33 ` Ondrej Mosnacek 2019-03-15 18:29 ` [PATCH ghak90 V5 02/10] audit: add container id Richard Guy Briggs 2019-03-16 20:00 ` Neil Horman 2019-03-27 20:38 ` Ondrej Mosnacek 2019-03-27 20:38 ` Ondrej Mosnacek 2019-03-27 20:44 ` Richard Guy Briggs 2019-03-15 18:29 ` [PATCH ghak90 V5 03/10] audit: read container ID of a process Richard Guy Briggs 2019-03-18 11:10 ` Neil Horman 2019-03-18 18:17 ` Richard Guy Briggs 2019-03-18 18:48 ` Neil Horman 2019-03-18 18:54 ` Richard Guy Briggs 2019-03-18 18:54 ` Richard Guy Briggs 2019-03-27 20:44 ` Ondrej Mosnacek 2019-03-15 18:29 ` [PATCH ghak90 V5 04/10] audit: log container info of syscalls Richard Guy Briggs 2019-03-15 18:29 ` Richard Guy Briggs 2019-03-16 22:44 ` Neil Horman 2019-03-27 21:01 ` Ondrej Mosnacek 2019-03-27 22:10 ` Richard Guy Briggs 2019-03-15 18:29 ` [PATCH ghak90 V5 05/10] audit: add containerid support for ptrace and signals Richard Guy Briggs 2019-03-15 18:29 ` Richard Guy Briggs 2019-03-18 19:04 ` Neil Horman 2019-03-18 19:29 ` Richard Guy Briggs 2019-03-18 19:29 ` Richard Guy Briggs 2019-03-27 21:17 ` Ondrej Mosnacek 2019-03-28 2:04 ` Richard Guy Briggs 2019-03-30 12:55 ` Richard Guy Briggs 2019-03-15 18:29 ` Richard Guy Briggs [this message] 2019-03-15 18:29 ` [PATCH ghak90 V5 06/10] audit: add support for non-syscall auxiliary records Richard Guy Briggs 2019-03-18 19:34 ` Neil Horman 2019-03-27 21:22 ` Ondrej Mosnacek 2019-04-01 14:49 ` Paul Moore 2019-04-01 17:44 ` Richard Guy Briggs 2019-04-01 17:44 ` Richard Guy Briggs 2019-04-01 18:57 ` Paul Moore 2019-04-01 20:43 ` Richard Guy Briggs 2019-03-15 18:29 ` [PATCH ghak90 V5 07/10] audit: add containerid support for user records Richard Guy Briggs 2019-03-15 18:29 ` Richard Guy Briggs 2019-03-18 19:41 ` Neil Horman 2019-03-27 21:30 ` Ondrej Mosnacek 2019-03-15 18:29 ` [PATCH ghak90 V5 08/10] audit: add containerid filtering Richard Guy Briggs 2019-03-15 18:29 ` Richard Guy Briggs 2019-03-18 20:02 ` Ondrej Mosnacek 2019-03-18 23:47 ` Richard Guy Briggs 2019-03-27 21:41 ` Ondrej Mosnacek 2019-03-27 22:00 ` Richard Guy Briggs 2019-03-27 22:00 ` Richard Guy Briggs 2019-03-18 20:39 ` Neil Horman 2019-03-15 18:29 ` [PATCH ghak90 V5 09/10] audit: add support for containerid to network namespaces Richard Guy Briggs 2019-03-18 20:56 ` Neil Horman 2019-03-27 22:42 ` Ondrej Mosnacek 2019-03-28 1:12 ` Richard Guy Briggs 2019-03-28 8:01 ` Ondrej Mosnacek 2019-03-28 8:01 ` Ondrej Mosnacek 2019-03-28 15:46 ` Paul Moore 2019-03-28 21:40 ` Richard Guy Briggs 2019-03-28 22:00 ` Paul Moore 2019-03-31 2:11 ` Neil Horman 2019-03-29 14:50 ` Neil Horman 2019-03-29 14:49 ` Neil Horman 2019-04-01 14:50 ` Paul Moore 2019-04-01 20:41 ` Richard Guy Briggs 2019-04-02 11:31 ` Neil Horman 2019-04-02 13:31 ` Paul Moore 2019-04-02 14:28 ` Neil Horman 2019-04-04 21:40 ` Richard Guy Briggs 2019-04-04 21:40 ` Richard Guy Briggs 2019-04-05 2:06 ` Paul Moore 2019-04-05 11:32 ` Neil Horman 2019-03-15 18:29 ` [PATCH ghak90 V5 10/10] audit: NETFILTER_PKT: record each container ID associated with a netNS Richard Guy Briggs 2019-03-15 18:29 ` Richard Guy Briggs 2019-03-15 18:43 ` Richard Guy Briggs 2019-03-18 20:58 ` Neil Horman 2019-03-27 22:52 ` Ondrej Mosnacek 2019-04-01 14:50 ` Paul Moore 2019-04-01 17:50 ` Richard Guy Briggs 2019-04-01 17:50 ` Richard Guy Briggs 2019-03-19 22:06 ` [PATCH ghak90 V5 00/10] audit: implement container identifier Richard Guy Briggs
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