Re: [RESEND PATCH 2/6] ipc: mqueue: Replace timespec with timespec64

From: Richard Guy Briggs
Date: Sat Jul 29 2017 - 11:27:34 EST

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In reply to: Deepa Dinamani: "Re: [RESEND PATCH 2/6] ipc: mqueue: Replace timespec with timespec64"
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On 2017-07-28 11:52, Deepa Dinamani wrote:
> struct timespec is not y2038 safe. Replace
> all uses of timespec by y2038 safe struct timespec64.
>
> Even though timespec is used here to represent timeouts,
> replace these with timespec64 so that it facilitates
> in verification by creating a y2038 safe kernel image
> that is free of timespec.
>
> The syscall interfaces themselves are not changed as part
> of the patch. They will be part of a different series.
>
> Signed-off-by: Deepa Dinamani <deepa.kernel@xxxxxxxxx>
> Cc: Paul Moore <paul@xxxxxxxxxxxxxx>
> Cc: Richard Guy Briggs <rgb@xxxxxxxxxx>

Looks reasonable to me.
Reviewed-by: Richard Guy Briggs <rgb@xxxxxxxxxx>

> ---
> include/linux/audit.h | 6 +++---
> ipc/mqueue.c | 28 ++++++++++++++--------------
> kernel/audit.h | 2 +-
> kernel/auditsc.c | 12 ++++++------
> 4 files changed, 24 insertions(+), 24 deletions(-)
>
> diff --git a/include/linux/audit.h b/include/linux/audit.h
> index 2150bdccfbab..74d4d4e8e3db 100644
> --- a/include/linux/audit.h
> +++ b/include/linux/audit.h
> @@ -351,7 +351,7 @@ extern int __audit_socketcall(int nargs, unsigned long *args);
> extern int __audit_sockaddr(int len, void *addr);
> extern void __audit_fd_pair(int fd1, int fd2);
> extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
> -extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
> +extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec64 *abs_timeout);
> extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
> extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
> extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
> @@ -412,7 +412,7 @@ static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
> if (unlikely(!audit_dummy_context()))
> __audit_mq_open(oflag, mode, attr);
> }
> -static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
> +static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec64 *abs_timeout)
> {
> if (unlikely(!audit_dummy_context()))
> __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
> @@ -549,7 +549,7 @@ static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
> { }
> static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
> unsigned int msg_prio,
> - const struct timespec *abs_timeout)
> + const struct timespec64 *abs_timeout)
> { }
> static inline void audit_mq_notify(mqd_t mqdes,
> const struct sigevent *notification)
> diff --git a/ipc/mqueue.c b/ipc/mqueue.c
> index c9ff943f19ab..5be1346a9167 100644
> --- a/ipc/mqueue.c
> +++ b/ipc/mqueue.c
> @@ -668,11 +668,11 @@ static void __do_notify(struct mqueue_inode_info *info)
> }
>
> static int prepare_timeout(const struct timespec __user *u_abs_timeout,
> - struct timespec *ts)
> + struct timespec64 *ts)
> {
> - if (copy_from_user(ts, u_abs_timeout, sizeof(struct timespec)))
> + if (get_timespec64(ts, u_abs_timeout))
> return -EFAULT;
> - if (!timespec_valid(ts))
> + if (!timespec64_valid(ts))
> return -EINVAL;
> return 0;
> }
> @@ -962,7 +962,7 @@ static inline void pipelined_receive(struct wake_q_head *wake_q,
>
> static int do_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
> size_t msg_len, unsigned int msg_prio,
> - struct timespec *ts)
> + struct timespec64 *ts)
> {
> struct fd f;
> struct inode *inode;
> @@ -979,7 +979,7 @@ static int do_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
> return -EINVAL;
>
> if (ts) {
> - expires = timespec_to_ktime(*ts);
> + expires = timespec64_to_ktime(*ts);
> timeout = &expires;
> }
>
> @@ -1080,7 +1080,7 @@ static int do_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
>
> static int do_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
> size_t msg_len, unsigned int __user *u_msg_prio,
> - struct timespec *ts)
> + struct timespec64 *ts)
> {
> ssize_t ret;
> struct msg_msg *msg_ptr;
> @@ -1092,7 +1092,7 @@ static int do_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
> struct posix_msg_tree_node *new_leaf = NULL;
>
> if (ts) {
> - expires = timespec_to_ktime(*ts);
> + expires = timespec64_to_ktime(*ts);
> timeout = &expires;
> }
>
> @@ -1184,7 +1184,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr,
> size_t, msg_len, unsigned int, msg_prio,
> const struct timespec __user *, u_abs_timeout)
> {
> - struct timespec ts, *p = NULL;
> + struct timespec64 ts, *p = NULL;
> if (u_abs_timeout) {
> int res = prepare_timeout(u_abs_timeout, &ts);
> if (res)
> @@ -1198,7 +1198,7 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
> size_t, msg_len, unsigned int __user *, u_msg_prio,
> const struct timespec __user *, u_abs_timeout)
> {
> - struct timespec ts, *p = NULL;
> + struct timespec64 ts, *p = NULL;
> if (u_abs_timeout) {
> int res = prepare_timeout(u_abs_timeout, &ts);
> if (res)
> @@ -1473,11 +1473,11 @@ COMPAT_SYSCALL_DEFINE4(mq_open, const char __user *, u_name,
> }
>
> static int compat_prepare_timeout(const struct compat_timespec __user *p,
> - struct timespec *ts)
> + struct timespec64 *ts)
> {
> - if (compat_get_timespec(ts, p))
> + if (compat_get_timespec64(ts, p))
> return -EFAULT;
> - if (!timespec_valid(ts))
> + if (!timespec64_valid(ts))
> return -EINVAL;
> return 0;
> }
> @@ -1487,7 +1487,7 @@ COMPAT_SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes,
> compat_size_t, msg_len, unsigned int, msg_prio,
> const struct compat_timespec __user *, u_abs_timeout)
> {
> - struct timespec ts, *p = NULL;
> + struct timespec64 ts, *p = NULL;
> if (u_abs_timeout) {
> int res = compat_prepare_timeout(u_abs_timeout, &ts);
> if (res)
> @@ -1502,7 +1502,7 @@ COMPAT_SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes,
> compat_size_t, msg_len, unsigned int __user *, u_msg_prio,
> const struct compat_timespec __user *, u_abs_timeout)
> {
> - struct timespec ts, *p = NULL;
> + struct timespec64 ts, *p = NULL;
> if (u_abs_timeout) {
> int res = compat_prepare_timeout(u_abs_timeout, &ts);
> if (res)
> diff --git a/kernel/audit.h b/kernel/audit.h
> index b331d9b83f63..9b110ae17ee3 100644
> --- a/kernel/audit.h
> +++ b/kernel/audit.h
> @@ -182,7 +182,7 @@ struct audit_context {
> mqd_t mqdes;
> size_t msg_len;
> unsigned int msg_prio;
> - struct timespec abs_timeout;
> + struct timespec64 abs_timeout;
> } mq_sendrecv;
> struct {
> int oflag;
> diff --git a/kernel/auditsc.c b/kernel/auditsc.c
> index 3260ba2312a9..d0870f8e3656 100644
> --- a/kernel/auditsc.c
> +++ b/kernel/auditsc.c
> @@ -1235,11 +1235,11 @@ static void show_special(struct audit_context *context, int *call_panic)
> case AUDIT_MQ_SENDRECV:
> audit_log_format(ab,
> "mqdes=%d msg_len=%zd msg_prio=%u "
> - "abs_timeout_sec=%ld abs_timeout_nsec=%ld",
> + "abs_timeout_sec=%lld abs_timeout_nsec=%ld",
> context->mq_sendrecv.mqdes,
> context->mq_sendrecv.msg_len,
> context->mq_sendrecv.msg_prio,
> - context->mq_sendrecv.abs_timeout.tv_sec,
> + (long long) context->mq_sendrecv.abs_timeout.tv_sec,
> context->mq_sendrecv.abs_timeout.tv_nsec);
> break;
> case AUDIT_MQ_NOTIFY:
> @@ -2083,15 +2083,15 @@ void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
> *
> */
> void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio,
> - const struct timespec *abs_timeout)
> + const struct timespec64 *abs_timeout)
> {
> struct audit_context *context = current->audit_context;
> - struct timespec *p = &context->mq_sendrecv.abs_timeout;
> + struct timespec64 *p = &context->mq_sendrecv.abs_timeout;
>
> if (abs_timeout)
> - memcpy(p, abs_timeout, sizeof(struct timespec));
> + memcpy(p, abs_timeout, sizeof(struct timespec64));
> else
> - memset(p, 0, sizeof(struct timespec));
> + memset(p, 0, sizeof(struct timespec64));
>
> context->mq_sendrecv.mqdes = mqdes;
> context->mq_sendrecv.msg_len = msg_len;
> --
> 2.11.0
>

- RGB

--
Richard Guy Briggs <rgb@xxxxxxxxxx>
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

Next message: Paul G. Allen: "Re: Yes you have standing to sue GRSecurity"
Previous message: Mike Galbraith: "Re: wake_wide mechanism clarification"
In reply to: Deepa Dinamani: "Re: [RESEND PATCH 2/6] ipc: mqueue: Replace timespec with timespec64"
Next in thread: Deepa Dinamani: "[RESEND PATCH 4/6] ipc: sem: Make sem_array timestamps y2038 safe"
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