| Message ID | f4a49f7c949e5df80c339a3fe5c4c2303b12bf23.1554732921.git.rgb@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | audit: implement container identifier | expand |
On Mon, Apr 8, 2019 at 11:40 PM Richard Guy Briggs <rgb@redhat.com> wrote: > > Create a new audit record AUDIT_CONTAINER_ID to document the audit > container identifier of a process if it is present. > > Called from audit_log_exit(), syscalls are covered. > > A sample raw event: > type=SYSCALL msg=audit(1519924845.499:257): arch=c000003e syscall=257 success=yes exit=3 a0=ffffff9c a1=56374e1cef30 a2=241 a3=1b6 items=2 ppid=606 pid=635 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=3 comm="bash" exe="/usr/bin/bash" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="tmpcontainerid" > type=CWD msg=audit(1519924845.499:257): cwd="/root" > type=PATH msg=audit(1519924845.499:257): item=0 name="/tmp/" inode=13863 dev=00:27 mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype= PARENT cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > type=PATH msg=audit(1519924845.499:257): item=1 name="/tmp/tmpcontainerid" inode=17729 dev=00:27 mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > type=PROCTITLE msg=audit(1519924845.499:257): proctitle=62617368002D6300736C65657020313B206563686F2074657374203E202F746D702F746D70636F6E7461696E65726964 > type=CONTAINER_ID msg=audit(1519924845.499:257): contid=123458 > > Please see the github audit kernel issue for the main feature: > https://github.com/linux-audit/audit-kernel/issues/90 > Please see the github audit userspace issue for supporting additions: > https://github.com/linux-audit/audit-userspace/issues/51 > Please see the github audit testsuiite issue for the test case: > https://github.com/linux-audit/audit-testsuite/issues/64 > Please see the github audit wiki for the feature overview: > https://github.com/linux-audit/audit-kernel/wiki/RFE-Audit-Container-ID > Signed-off-by: Richard Guy Briggs <rgb@redhat.com> > Acked-by: Serge Hallyn <serge@hallyn.com> > Acked-by: Steve Grubb <sgrubb@redhat.com> > Acked-by: Neil Horman <nhorman@tuxdriver.com> > Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com> > --- > include/linux/audit.h | 5 +++++ > include/uapi/linux/audit.h | 1 + > kernel/audit.c | 20 ++++++++++++++++++++ > kernel/auditsc.c | 20 ++++++++++++++------ > 4 files changed, 40 insertions(+), 6 deletions(-) ... > diff --git a/kernel/audit.c b/kernel/audit.c > index 182b0f2c183d..3e0af53f3c4d 100644 > --- a/kernel/audit.c > +++ b/kernel/audit.c > @@ -2127,6 +2127,26 @@ void audit_log_session_info(struct audit_buffer *ab) > audit_log_format(ab, "auid=%u ses=%u", auid, sessionid); > } > > +/* > + * audit_log_contid - report container info > + * @context: task or local context for record > + * @contid: container ID to report > + */ > +void audit_log_contid(struct audit_context *context, u64 contid) > +{ > + struct audit_buffer *ab; > + > + if (!audit_contid_valid(contid)) > + return; > + /* Generate AUDIT_CONTAINER_ID record with container ID */ > + ab = audit_log_start(context, GFP_KERNEL, AUDIT_CONTAINER_ID); > + if (!ab) > + return; > + audit_log_format(ab, "contid=%llu", (unsigned long long)contid); We have a consistency problem regarding how to output the u64 contid values; this function uses an explicit cast, others do not. According to Documentation/core-api/printk-formats.rst the recommendation for u64 is %llu (or %llx, if you want hex). Looking quickly through the printk code this appears to still be correct. I suggest we get rid of the cast (like it was in v5). > + audit_log_end(ab); > +} > +EXPORT_SYMBOL(audit_log_contid); -- paul moore www.paul-moore.com
On Thu, May 30, 2019 at 12:16 AM Paul Moore <paul@paul-moore.com> wrote: > On Mon, Apr 8, 2019 at 11:40 PM Richard Guy Briggs <rgb@redhat.com> wrote: > > > > Create a new audit record AUDIT_CONTAINER_ID to document the audit > > container identifier of a process if it is present. > > > > Called from audit_log_exit(), syscalls are covered. > > > > A sample raw event: > > type=SYSCALL msg=audit(1519924845.499:257): arch=c000003e syscall=257 success=yes exit=3 a0=ffffff9c a1=56374e1cef30 a2=241 a3=1b6 items=2 ppid=606 pid=635 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=3 comm="bash" exe="/usr/bin/bash" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="tmpcontainerid" > > type=CWD msg=audit(1519924845.499:257): cwd="/root" > > type=PATH msg=audit(1519924845.499:257): item=0 name="/tmp/" inode=13863 dev=00:27 mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype= PARENT cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > > type=PATH msg=audit(1519924845.499:257): item=1 name="/tmp/tmpcontainerid" inode=17729 dev=00:27 mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > > type=PROCTITLE msg=audit(1519924845.499:257): proctitle=62617368002D6300736C65657020313B206563686F2074657374203E202F746D702F746D70636F6E7461696E65726964 > > type=CONTAINER_ID msg=audit(1519924845.499:257): contid=123458 > > > > Please see the github audit kernel issue for the main feature: > > https://github.com/linux-audit/audit-kernel/issues/90 > > Please see the github audit userspace issue for supporting additions: > > https://github.com/linux-audit/audit-userspace/issues/51 > > Please see the github audit testsuiite issue for the test case: > > https://github.com/linux-audit/audit-testsuite/issues/64 > > Please see the github audit wiki for the feature overview: > > https://github.com/linux-audit/audit-kernel/wiki/RFE-Audit-Container-ID > > Signed-off-by: Richard Guy Briggs <rgb@redhat.com> > > Acked-by: Serge Hallyn <serge@hallyn.com> > > Acked-by: Steve Grubb <sgrubb@redhat.com> > > Acked-by: Neil Horman <nhorman@tuxdriver.com> > > Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com> > > --- > > include/linux/audit.h | 5 +++++ > > include/uapi/linux/audit.h | 1 + > > kernel/audit.c | 20 ++++++++++++++++++++ > > kernel/auditsc.c | 20 ++++++++++++++------ > > 4 files changed, 40 insertions(+), 6 deletions(-) > > ... > > > diff --git a/kernel/audit.c b/kernel/audit.c > > index 182b0f2c183d..3e0af53f3c4d 100644 > > --- a/kernel/audit.c > > +++ b/kernel/audit.c > > @@ -2127,6 +2127,26 @@ void audit_log_session_info(struct audit_buffer *ab) > > audit_log_format(ab, "auid=%u ses=%u", auid, sessionid); > > } > > > > +/* > > + * audit_log_contid - report container info > > + * @context: task or local context for record > > + * @contid: container ID to report > > + */ > > +void audit_log_contid(struct audit_context *context, u64 contid) > > +{ > > + struct audit_buffer *ab; > > + > > + if (!audit_contid_valid(contid)) > > + return; > > + /* Generate AUDIT_CONTAINER_ID record with container ID */ > > + ab = audit_log_start(context, GFP_KERNEL, AUDIT_CONTAINER_ID); > > + if (!ab) > > + return; > > + audit_log_format(ab, "contid=%llu", (unsigned long long)contid); > > We have a consistency problem regarding how to output the u64 contid > values; this function uses an explicit cast, others do not. According > to Documentation/core-api/printk-formats.rst the recommendation for > u64 is %llu (or %llx, if you want hex). Looking quickly through the > printk code this appears to still be correct. I suggest we get rid of > the cast (like it was in v5). IIRC it was me who suggested to add the casts. I didn't realize that the kernel actually guarantees that "%llu" will always work with u64. Taking that into account I rescind my request to add the cast. Sorry for the false alarm. > > > + audit_log_end(ab); > > +} > > +EXPORT_SYMBOL(audit_log_contid); > > -- > paul moore > www.paul-moore.com -- Ondrej Mosnacek <omosnace at redhat dot com> Software Engineer, Security Technologies Red Hat, Inc.
On 2019-05-30 15:08, Ondrej Mosnacek wrote: > On Thu, May 30, 2019 at 12:16 AM Paul Moore <paul@paul-moore.com> wrote: > > On Mon, Apr 8, 2019 at 11:40 PM Richard Guy Briggs <rgb@redhat.com> wrote: > > > > > > Create a new audit record AUDIT_CONTAINER_ID to document the audit > > > container identifier of a process if it is present. > > > > > > Called from audit_log_exit(), syscalls are covered. > > > > > > A sample raw event: > > > type=SYSCALL msg=audit(1519924845.499:257): arch=c000003e syscall=257 success=yes exit=3 a0=ffffff9c a1=56374e1cef30 a2=241 a3=1b6 items=2 ppid=606 pid=635 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=3 comm="bash" exe="/usr/bin/bash" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="tmpcontainerid" > > > type=CWD msg=audit(1519924845.499:257): cwd="/root" > > > type=PATH msg=audit(1519924845.499:257): item=0 name="/tmp/" inode=13863 dev=00:27 mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype= PARENT cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > > > type=PATH msg=audit(1519924845.499:257): item=1 name="/tmp/tmpcontainerid" inode=17729 dev=00:27 mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > > > type=PROCTITLE msg=audit(1519924845.499:257): proctitle=62617368002D6300736C65657020313B206563686F2074657374203E202F746D702F746D70636F6E7461696E65726964 > > > type=CONTAINER_ID msg=audit(1519924845.499:257): contid=123458 > > > > > > Please see the github audit kernel issue for the main feature: > > > https://github.com/linux-audit/audit-kernel/issues/90 > > > Please see the github audit userspace issue for supporting additions: > > > https://github.com/linux-audit/audit-userspace/issues/51 > > > Please see the github audit testsuiite issue for the test case: > > > https://github.com/linux-audit/audit-testsuite/issues/64 > > > Please see the github audit wiki for the feature overview: > > > https://github.com/linux-audit/audit-kernel/wiki/RFE-Audit-Container-ID > > > Signed-off-by: Richard Guy Briggs <rgb@redhat.com> > > > Acked-by: Serge Hallyn <serge@hallyn.com> > > > Acked-by: Steve Grubb <sgrubb@redhat.com> > > > Acked-by: Neil Horman <nhorman@tuxdriver.com> > > > Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com> > > > --- > > > include/linux/audit.h | 5 +++++ > > > include/uapi/linux/audit.h | 1 + > > > kernel/audit.c | 20 ++++++++++++++++++++ > > > kernel/auditsc.c | 20 ++++++++++++++------ > > > 4 files changed, 40 insertions(+), 6 deletions(-) > > > > ... > > > > > diff --git a/kernel/audit.c b/kernel/audit.c > > > index 182b0f2c183d..3e0af53f3c4d 100644 > > > --- a/kernel/audit.c > > > +++ b/kernel/audit.c > > > @@ -2127,6 +2127,26 @@ void audit_log_session_info(struct audit_buffer *ab) > > > audit_log_format(ab, "auid=%u ses=%u", auid, sessionid); > > > } > > > > > > +/* > > > + * audit_log_contid - report container info > > > + * @context: task or local context for record > > > + * @contid: container ID to report > > > + */ > > > +void audit_log_contid(struct audit_context *context, u64 contid) > > > +{ > > > + struct audit_buffer *ab; > > > + > > > + if (!audit_contid_valid(contid)) > > > + return; > > > + /* Generate AUDIT_CONTAINER_ID record with container ID */ > > > + ab = audit_log_start(context, GFP_KERNEL, AUDIT_CONTAINER_ID); > > > + if (!ab) > > > + return; > > > + audit_log_format(ab, "contid=%llu", (unsigned long long)contid); > > > > We have a consistency problem regarding how to output the u64 contid > > values; this function uses an explicit cast, others do not. According > > to Documentation/core-api/printk-formats.rst the recommendation for > > u64 is %llu (or %llx, if you want hex). Looking quickly through the > > printk code this appears to still be correct. I suggest we get rid of > > the cast (like it was in v5). > > IIRC it was me who suggested to add the casts. I didn't realize that > the kernel actually guarantees that "%llu" will always work with u64. > Taking that into account I rescind my request to add the cast. Sorry > for the false alarm. Yeah, just remove the cast. > > > + audit_log_end(ab); > > > +} > > > +EXPORT_SYMBOL(audit_log_contid); > > > > -- > > paul moore > > www.paul-moore.com > > -- > Ondrej Mosnacek <omosnace at redhat dot com> > Software Engineer, Security Technologies > Red Hat, Inc. > > -- > Linux-audit mailing list > Linux-audit@redhat.com > https://www.redhat.com/mailman/listinfo/linux-audit - RGB -- Richard Guy Briggs <rgb@redhat.com> Sr. S/W Engineer, Kernel Security, Base Operating Systems Remote, Ottawa, Red Hat Canada IRC: rgb, SunRaycer Voice: +1.647.777.2635, Internal: (81) 32635
On Thu, May 30, 2019 at 10:09 AM Richard Guy Briggs <rgb@redhat.com> wrote: > > On 2019-05-30 15:08, Ondrej Mosnacek wrote: > > On Thu, May 30, 2019 at 12:16 AM Paul Moore <paul@paul-moore.com> wrote: > > > On Mon, Apr 8, 2019 at 11:40 PM Richard Guy Briggs <rgb@redhat.com> wrote: > > > > > > > > Create a new audit record AUDIT_CONTAINER_ID to document the audit > > > > container identifier of a process if it is present. > > > > > > > > Called from audit_log_exit(), syscalls are covered. > > > > > > > > A sample raw event: > > > > type=SYSCALL msg=audit(1519924845.499:257): arch=c000003e syscall=257 success=yes exit=3 a0=ffffff9c a1=56374e1cef30 a2=241 a3=1b6 items=2 ppid=606 pid=635 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=3 comm="bash" exe="/usr/bin/bash" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="tmpcontainerid" > > > > type=CWD msg=audit(1519924845.499:257): cwd="/root" > > > > type=PATH msg=audit(1519924845.499:257): item=0 name="/tmp/" inode=13863 dev=00:27 mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype= PARENT cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > > > > type=PATH msg=audit(1519924845.499:257): item=1 name="/tmp/tmpcontainerid" inode=17729 dev=00:27 mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE cap_fp=0 cap_fi=0 cap_fe=0 cap_fver=0 > > > > type=PROCTITLE msg=audit(1519924845.499:257): proctitle=62617368002D6300736C65657020313B206563686F2074657374203E202F746D702F746D70636F6E7461696E65726964 > > > > type=CONTAINER_ID msg=audit(1519924845.499:257): contid=123458 > > > > > > > > Please see the github audit kernel issue for the main feature: > > > > https://github.com/linux-audit/audit-kernel/issues/90 > > > > Please see the github audit userspace issue for supporting additions: > > > > https://github.com/linux-audit/audit-userspace/issues/51 > > > > Please see the github audit testsuiite issue for the test case: > > > > https://github.com/linux-audit/audit-testsuite/issues/64 > > > > Please see the github audit wiki for the feature overview: > > > > https://github.com/linux-audit/audit-kernel/wiki/RFE-Audit-Container-ID > > > > Signed-off-by: Richard Guy Briggs <rgb@redhat.com> > > > > Acked-by: Serge Hallyn <serge@hallyn.com> > > > > Acked-by: Steve Grubb <sgrubb@redhat.com> > > > > Acked-by: Neil Horman <nhorman@tuxdriver.com> > > > > Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com> > > > > --- > > > > include/linux/audit.h | 5 +++++ > > > > include/uapi/linux/audit.h | 1 + > > > > kernel/audit.c | 20 ++++++++++++++++++++ > > > > kernel/auditsc.c | 20 ++++++++++++++------ > > > > 4 files changed, 40 insertions(+), 6 deletions(-) > > > > > > ... > > > > > > > diff --git a/kernel/audit.c b/kernel/audit.c > > > > index 182b0f2c183d..3e0af53f3c4d 100644 > > > > --- a/kernel/audit.c > > > > +++ b/kernel/audit.c > > > > @@ -2127,6 +2127,26 @@ void audit_log_session_info(struct audit_buffer *ab) > > > > audit_log_format(ab, "auid=%u ses=%u", auid, sessionid); > > > > } > > > > > > > > +/* > > > > + * audit_log_contid - report container info > > > > + * @context: task or local context for record > > > > + * @contid: container ID to report > > > > + */ > > > > +void audit_log_contid(struct audit_context *context, u64 contid) > > > > +{ > > > > + struct audit_buffer *ab; > > > > + > > > > + if (!audit_contid_valid(contid)) > > > > + return; > > > > + /* Generate AUDIT_CONTAINER_ID record with container ID */ > > > > + ab = audit_log_start(context, GFP_KERNEL, AUDIT_CONTAINER_ID); > > > > + if (!ab) > > > > + return; > > > > + audit_log_format(ab, "contid=%llu", (unsigned long long)contid); > > > > > > We have a consistency problem regarding how to output the u64 contid > > > values; this function uses an explicit cast, others do not. According > > > to Documentation/core-api/printk-formats.rst the recommendation for > > > u64 is %llu (or %llx, if you want hex). Looking quickly through the > > > printk code this appears to still be correct. I suggest we get rid of > > > the cast (like it was in v5). > > > > IIRC it was me who suggested to add the casts. I didn't realize that > > the kernel actually guarantees that "%llu" will always work with u64. > > Taking that into account I rescind my request to add the cast. Sorry > > for the false alarm. > > Yeah, just remove the cast. Okay, this is trivial enough I'll take care of this during the merge with a note.
diff --git a/include/linux/audit.h b/include/linux/audit.h index 301337776193..43438192ca2a 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -199,6 +199,8 @@ static inline u64 audit_get_contid(struct task_struct *tsk) return tsk->audit->contid; } +extern void audit_log_contid(struct audit_context *context, u64 contid); + extern u32 audit_enabled; #else /* CONFIG_AUDIT */ static inline int audit_alloc(struct task_struct *task) @@ -265,6 +267,9 @@ static inline u64 audit_get_contid(struct task_struct *tsk) return AUDIT_CID_UNSET; } +static inline void audit_log_contid(struct audit_context *context, u64 contid) +{ } + #define audit_enabled AUDIT_OFF #endif /* CONFIG_AUDIT */ diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index 4a6a8bf1de32..55fde9970762 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -115,6 +115,7 @@ #define AUDIT_REPLACE 1329 /* Replace auditd if this packet unanswerd */ #define AUDIT_KERN_MODULE 1330 /* Kernel Module events */ #define AUDIT_FANOTIFY 1331 /* Fanotify access decision */ +#define AUDIT_CONTAINER_ID 1332 /* Container ID */ #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */ #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */ diff --git a/kernel/audit.c b/kernel/audit.c index 182b0f2c183d..3e0af53f3c4d 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -2127,6 +2127,26 @@ void audit_log_session_info(struct audit_buffer *ab) audit_log_format(ab, "auid=%u ses=%u", auid, sessionid); } +/* + * audit_log_contid - report container info + * @context: task or local context for record + * @contid: container ID to report + */ +void audit_log_contid(struct audit_context *context, u64 contid) +{ + struct audit_buffer *ab; + + if (!audit_contid_valid(contid)) + return; + /* Generate AUDIT_CONTAINER_ID record with container ID */ + ab = audit_log_start(context, GFP_KERNEL, AUDIT_CONTAINER_ID); + if (!ab) + return; + audit_log_format(ab, "contid=%llu", (unsigned long long)contid); + audit_log_end(ab); +} +EXPORT_SYMBOL(audit_log_contid); + void audit_log_key(struct audit_buffer *ab, char *key) { audit_log_format(ab, " key="); diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 1f7edf035b16..eea445b7a181 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -1523,7 +1523,7 @@ static void audit_log_exit(void) for (aux = context->aux_pids; aux; aux = aux->next) { struct audit_aux_data_pids *axs = (void *)aux; - for (i = 0; i < axs->pid_count; i++) + for (i = 0; i < axs->pid_count; i++) { if (audit_log_pid_context(context, axs->target_pid[i], axs->target_auid[i], axs->target_uid[i], @@ -1531,14 +1531,20 @@ static void audit_log_exit(void) axs->target_sid[i], axs->target_comm[i])) call_panic = 1; + audit_log_contid(context, axs->target_cid[i]); + } } - if (context->target_pid && - audit_log_pid_context(context, context->target_pid, - context->target_auid, context->target_uid, - context->target_sessionid, - context->target_sid, context->target_comm)) + if (context->target_pid) { + if (audit_log_pid_context(context, context->target_pid, + context->target_auid, + context->target_uid, + context->target_sessionid, + context->target_sid, + context->target_comm)) call_panic = 1; + audit_log_contid(context, context->target_cid); + } if (context->pwd.dentry && context->pwd.mnt) { ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD); @@ -1557,6 +1563,8 @@ static void audit_log_exit(void) audit_log_proctitle(); + audit_log_contid(context, audit_get_contid(current)); + /* Send end of event record to help user space know we are finished */ ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE); if (ab)