• Alexey Budankov's avatar
    drivers/oprofile: Open access for CAP_PERFMON privileged process · ab76878b
    Alexey Budankov authored
    Open access to monitoring for CAP_PERFMON privileged process.  Providing
    the access under CAP_PERFMON capability singly, without the rest of
    CAP_SYS_ADMIN credentials, excludes chances to misuse the credentials
    and makes operation more secure.
    
    CAP_PERFMON implements the principle of least privilege for performance
    monitoring and observability operations (POSIX IEEE 1003.1e 2.2.2.39
    principle of least privilege: A security design principle that states
    that a process or program be granted only those privileges (e.g.,
    capabilities) necessary to accomplish its legitimate function, and only
    for the time that such privileges are actually required)
    
    For backward compatibility reasons access to the monitoring remains open
    for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN usage for
    secure monitoring is discouraged with respect to CAP_PERFMON capability.
    Signed-off-by: default avatarAlexey Budankov <alexey.budankov@linux.intel.com>
    Acked-by: default avatarJames Morris <jamorris@linux.microsoft.com>
    Cc: Alexei Starovoitov <ast@kernel.org>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: Igor Lubashev <ilubashe@akamai.com>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Serge Hallyn <serge@hallyn.com>
    Cc: Song Liu <songliubraving@fb.com>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: intel-gfx@lists.freedesktop.org
    Cc: linux-doc@vger.kernel.org
    Cc: linux-man@vger.kernel.org
    Cc: linux-security-module@vger.kernel.org
    Cc: selinux@vger.kernel.org
    Link: http://lore.kernel.org/lkml/691f1096-b15f-9b12-50a0-c2b93918149e@linux.intel.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    ab76878b
event_buffer.c 4.54 KB