Re: [PATCH 17/21] audit: Use timespec64 to represent audit timestamps

On Wednesday, June 08, 2016 10:05:01 PM Deepa Dinamani wrote: > struct timespec is not y2038 safe. > Audit timestamps are recorded in string format into > an audit buffer for a given context. > These mark the entry timestamps for the syscalls. > Use y2038 safe struct timespec64 to represent the times. > The log strings can handle this transition as strings can > hold upto 1024 characters. Have you tested this with ausearch or any audit utilities? As an aside, a time stamp that is up to 1024 characters long is terribly wasteful considering how many events we get.

-Steve > Signed-off-by: Deepa Dinamani <deepa.kernel(a)gmail.com&gt; > Cc: Paul Moore <paul(a)paul-moore.com&gt; > Cc: Eric Paris <eparis(a)redhat.com&gt; > Cc: linux-audit(a)redhat.com > --- > include/linux/audit.h | 4 ++-- > kernel/audit.c | 10 +++++----- > kernel/audit.h | 2 +- > kernel/auditsc.c | 6 +++--- > 4 files changed, 11 insertions(+), 11 deletions(-) > > diff --git a/include/linux/audit.h b/include/linux/audit.h > index 961a417..2f6a1123 100644 > --- a/include/linux/audit.h > +++ b/include/linux/audit.h > @@ -335,7 +335,7 @@ static inline void audit_ptrace(struct task_struct *t) > /* Private API (for audit.c only) */ > extern unsigned int audit_serial(void); > extern int auditsc_get_stamp(struct audit_context *ctx, > - struct timespec *t, unsigned int *serial); > + struct timespec64 *t, unsigned int *serial); > extern int audit_set_loginuid(kuid_t loginuid); > > static inline kuid_t audit_get_loginuid(struct task_struct *tsk) > @@ -510,7 +510,7 @@ static inline void __audit_seccomp(unsigned long > syscall, long signr, int code) static inline void audit_seccomp(unsigned > long syscall, long signr, int code) { } > static inline int auditsc_get_stamp(struct audit_context *ctx, > - struct timespec *t, unsigned int *serial) > + struct timespec64 *t, unsigned int *serial) > { > return 0; > } > diff --git a/kernel/audit.c b/kernel/audit.c > index 22bb4f2..6c2f405 100644 > --- a/kernel/audit.c > +++ b/kernel/audit.c > @@ -1325,10 +1325,10 @@ unsigned int audit_serial(void) > } > > static inline void audit_get_stamp(struct audit_context *ctx, > - struct timespec *t, unsigned int *serial) > + struct timespec64 *t, unsigned int *serial) > { > if (!ctx || !auditsc_get_stamp(ctx, t, serial)) { > - *t = CURRENT_TIME; > + ktime_get_real_ts64(t); > *serial = audit_serial(); > } > } > @@ -1370,7 +1370,7 @@ struct audit_buffer *audit_log_start(struct > audit_context *ctx, gfp_t gfp_mask, int type) > { > struct audit_buffer *ab = NULL; > - struct timespec t; > + struct timespec64 t; > unsigned int uninitialized_var(serial); > int reserve = 5; /* Allow atomic callers to go up to five > entries over the normal backlog limit */ > @@ -1422,8 +1422,8 @@ struct audit_buffer *audit_log_start(struct > audit_context *ctx, gfp_t gfp_mask, > > audit_get_stamp(ab->ctx, &t, &serial); > > - audit_log_format(ab, "audit(%lu.%03lu:%u): ", > - t.tv_sec, t.tv_nsec/1000000, serial); > + audit_log_format(ab, "audit(%llu.%03lu:%u): ", > + (unsigned long long)t.tv_sec, t.tv_nsec/1000000, serial); > return ab; > } > > diff --git a/kernel/audit.h b/kernel/audit.h > index cbbe6bb..029d674 100644 > --- a/kernel/audit.h > +++ b/kernel/audit.h > @@ -111,7 +111,7 @@ struct audit_context { > enum audit_state state, current_state; > unsigned int serial; /* serial number for record */ > int major; /* syscall number */ > - struct timespec ctime; /* time of syscall entry */ > + struct timespec64 ctime; /* time of syscall entry */ > unsigned long argv[4]; /* syscall arguments */ > long return_code;/* syscall return code */ > u64 prio; > diff --git a/kernel/auditsc.c b/kernel/auditsc.c > index 62ab53d..ecebb3c 100644 > --- a/kernel/auditsc.c > +++ b/kernel/auditsc.c > @@ -1523,7 +1523,7 @@ void __audit_syscall_entry(int major, unsigned long > a1, unsigned long a2, return; > > context->serial = 0; > - context->ctime = CURRENT_TIME; > + ktime_get_real_ts64(&context->ctime); > context->in_syscall = 1; > context->current_state = state; > context->ppid = 0; > @@ -1932,13 +1932,13 @@ EXPORT_SYMBOL_GPL(__audit_inode_child); > /** > * auditsc_get_stamp - get local copies of audit_context values > * @ctx: audit_context for the task > - * @t: timespec to store time recorded in the audit_context > + * @t: timespec64 to store time recorded in the audit_context > * @serial: serial value that is recorded in the audit_context > * > * Also sets the context as auditable. > */ > int auditsc_get_stamp(struct audit_context *ctx, > - struct timespec *t, unsigned int *serial) > + struct timespec64 *t, unsigned int *serial) > { > if (!ctx->in_syscall) > return 0; -- Linux-audit mailing list Linux-audit(a)redhat.com https://www.redhat.com/mailman/listinfo/linux-audit