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From: Steve Grubb <sgrubb@redhat.com>
To: linux-audit@redhat.com
Cc: Deepa Dinamani <deepa.kernel@gmail.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	Arnd Bergmann <arnd@arndb.de>,
	y2038@lists.linaro.org, Al Viro <viro@zeniv.linux.org.uk>,
	Thomas Gleixner <tglx@linutronix.de>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 17/21] audit: Use timespec64 to represent audit timestamps
Date: Thu, 09 Jun 2016 10:31:33 -0400
Message-ID: <15760445.1IAucOxmWy@x2> (raw)
In-Reply-To: <1465448705-25055-18-git-send-email-deepa.kernel@gmail.com>

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@gmail.com>
> Cc: Paul Moore <paul@paul-moore.com>
> Cc: Eric Paris <eparis@redhat.com>
> Cc: linux-audit@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;

  reply index

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-09  5:04 [PATCH 00/21] Delete CURRENT_TIME and CURRENT_TIME_SEC macros Deepa Dinamani
2016-06-09  5:04 ` [PATCH 01/21] fs: Replace CURRENT_TIME_SEC with current_fs_time() Deepa Dinamani
2016-06-09  7:35   ` Jan Kara
2016-06-09 19:15     ` Linus Torvalds
2016-06-09 20:41       ` Deepa Dinamani
2016-06-09 12:31   ` Bob Copeland
2016-06-10 22:21   ` Arnd Bergmann
2016-06-11  5:03     ` Deepa Dinamani
2016-06-11 20:55       ` Arnd Bergmann
2016-06-09  5:04 ` [PATCH 02/21] fs: ext4: Use current_fs_time() for inode timestamps Deepa Dinamani
2016-06-09 18:45   ` Linus Torvalds
2016-06-09 18:55     ` Linus Torvalds
2016-06-10 22:19     ` [Y2038] " Arnd Bergmann
2016-06-14 17:55       ` Deepa Dinamani
2016-06-14 20:59         ` Arnd Bergmann
2016-06-09  5:04 ` [PATCH 03/21] fs: ubifs: " Deepa Dinamani
2016-06-09  5:04 ` [PATCH 05/21] fs: jfs: Replace CURRENT_TIME_SEC by current_fs_time() Deepa Dinamani
2016-06-09  5:04 ` [PATCH 06/21] fs: udf: Replace CURRENT_TIME with current_fs_time() Deepa Dinamani
2016-06-09  7:41   ` Jan Kara
2016-06-10  0:53     ` Deepa Dinamani
2016-06-09  5:04 ` [PATCH 07/21] fs: cifs: Replace CURRENT_TIME by current_fs_time() Deepa Dinamani
2016-06-09  5:04 ` [PATCH 08/21] fs: cifs: Replace CURRENT_TIME with ktime_get_real_ts() Deepa Dinamani
2016-06-09  5:04 ` [PATCH 09/21] fs: cifs: Replace CURRENT_TIME by get_seconds Deepa Dinamani
2016-06-09  5:04 ` [PATCH 10/21] fs: f2fs: Use ktime_get_real_seconds for sit_info times Deepa Dinamani
2016-06-09  5:04 ` [PATCH 11/21] drivers: staging: lustre: Replace CURRENT_TIME with current_fs_time() Deepa Dinamani
2016-06-11  0:36   ` [lustre-devel] " James Simmons
2016-06-11  1:53     ` Andreas Dilger
2016-06-09  5:04 ` [PATCH 12/21] block: rbd: Replace non inode " Deepa Dinamani
2016-06-09  5:04 ` [PATCH 13/21] fs: ocfs2: Use time64_t to represent orphan scan times Deepa Dinamani
2016-06-09  5:04 ` [PATCH 14/21] fs: ocfs2: Replace CURRENT_TIME with ktime_get_real_seconds() Deepa Dinamani
2016-06-09  5:04 ` [PATCH 15/21] time: Add time64_to_tm() Deepa Dinamani
2016-06-14 21:18   ` John Stultz
2016-06-15 17:44     ` Deepa Dinamani
2016-06-17 20:52       ` John Stultz
2016-06-17 20:59         ` Deepa Dinamani
2016-06-17 21:06           ` Arnd Bergmann
2016-06-09  5:05 ` [PATCH 16/21] fnic: Use time64_t to represent trace timestamps Deepa Dinamani
2016-06-09  5:05 ` [PATCH 17/21] audit: Use timespec64 to represent audit timestamps Deepa Dinamani
2016-06-09 14:31   ` Steve Grubb [this message]
2016-06-09 23:59     ` Richard Guy Briggs
2016-06-10  0:19       ` Steve Grubb
2016-06-10  1:44         ` Richard Guy Briggs
2016-06-15 21:23       ` Paul Moore
2016-06-10  0:45     ` Deepa Dinamani
2016-06-09  5:05 ` [PATCH 18/21] fs: nfs: Make nfs boot time y2038 safe Deepa Dinamani
2016-06-09 19:23   ` Trond Myklebust
2016-06-09 21:10     ` Deepa Dinamani
2016-06-10 13:12       ` Anna Schumaker
2016-06-10 14:02         ` Trond Myklebust
2016-06-09  5:05 ` [PATCH 19/21] libceph: Remove CURRENT_TIME references Deepa Dinamani
2016-06-09  5:05 ` [PATCH 20/21] libceph: Replace CURRENT_TIME with ktime_get_real_ts Deepa Dinamani
2016-06-09  5:05 ` [PATCH 21/21] time: Delete CURRENT_TIME_SEC and CURRENT_TIME macro Deepa Dinamani
2016-06-14 21:20   ` John Stultz
2016-06-09  7:51 ` [PATCH 00/21] Delete CURRENT_TIME and CURRENT_TIME_SEC macros Felipe Balbi

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