diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2019-11-20 22:38:16 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-11-20 13:44:51 -0800 |
| commit | 91e6015b082b08a74e5d9d326f651e5890a93519 (patch) | |
| tree | dca309a8e414d6a13bb1a6a0a64847b5e28c50ed /include | |
| parent | b2e2f0e6a6f910c906c083584b6e0afd12266f22 (diff) | |
bpf: Emit audit messages upon successful prog load and unload
Allow for audit messages to be emitted upon BPF program load and
unload for having a timeline of events. The load itself is in
syscall context, so additional info about the process initiating
the BPF prog creation can be logged and later directly correlated
to the unload event.
The only info really needed from BPF side is the globally unique
prog ID where then audit user space tooling can query / dump all
info needed about the specific BPF program right upon load event
and enrich the record, thus these changes needed here can be kept
small and non-intrusive to the core.
Raw example output:
# auditctl -D
# auditctl -a always,exit -F arch=x86_64 -S bpf
# ausearch --start recent -m 1334
[...]
----
time->Wed Nov 20 12:45:51 2019
type=PROCTITLE msg=audit(1574271951.590:8974): proctitle="./test_verifier"
type=SYSCALL msg=audit(1574271951.590:8974): arch=c000003e syscall=321 success=yes exit=14 a0=5 a1=7ffe2d923e80 a2=78 a3=0 items=0 ppid=742 pid=949 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=2 comm="test_verifier" exe="/root/bpf-next/tools/testing/selftests/bpf/test_verifier" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
type=UNKNOWN[1334] msg=audit(1574271951.590:8974): auid=0 uid=0 gid=0 ses=2 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 pid=949 comm="test_verifier" exe="/root/bpf-next/tools/testing/selftests/bpf/test_verifier" prog-id=3260 event=LOAD
----
time->Wed Nov 20 12:45:51 2019
type=UNKNOWN[1334] msg=audit(1574271951.590:8975): prog-id=3260 event=UNLOAD
----
[...]
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191120213816.8186-1-jolsa@kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/audit.h | 3 | ||||
| -rw-r--r-- | include/uapi/linux/audit.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h index aee3dc9eb378..edd006f4597d 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -159,6 +159,7 @@ extern void audit_log_key(struct audit_buffer *ab, extern void audit_log_link_denied(const char *operation); extern void audit_log_lost(const char *message); +extern void audit_log_task(struct audit_buffer *ab); extern int audit_log_task_context(struct audit_buffer *ab); extern void audit_log_task_info(struct audit_buffer *ab); @@ -219,6 +220,8 @@ static inline void audit_log_key(struct audit_buffer *ab, char *key) { } static inline void audit_log_link_denied(const char *string) { } +static inline void audit_log_task(struct audit_buffer *ab) +{ } static inline int audit_log_task_context(struct audit_buffer *ab) { return 0; diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h index c89c6495983d..32a5db900f47 100644 --- a/include/uapi/linux/audit.h +++ b/include/uapi/linux/audit.h @@ -116,6 +116,7 @@ #define AUDIT_FANOTIFY 1331 /* Fanotify access decision */ #define AUDIT_TIME_INJOFFSET 1332 /* Timekeeping offset injected */ #define AUDIT_TIME_ADJNTPVAL 1333 /* NTP value adjustment */ +#define AUDIT_BPF 1334 /* BPF subsystem */ #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */ #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */ |