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Subject[GIT PULL] timer fixes
Linus,

Please pull the latest timers/urgent git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers-urgent-2022-08-13

# HEAD: e362359ace6f87c201531872486ff295df306d13 posix-cpu-timers: Cleanup CPU timers before freeing them during exec

Misc timer fixes:

- fix a potential use-after-free bug in posix timers
- correct a prototype
- address a build warning

Thanks,

Ingo

------------------>
Jiri Slaby (1):
posix-timers: Make do_clock_gettime() static

Thadeu Lima de Souza Cascardo (1):
posix-cpu-timers: Cleanup CPU timers before freeing them during exec

Youngmin Nam (1):
time: Correct the prototype of ns_to_kernel_old_timeval and ns_to_timespec64


fs/exec.c | 3 +++
include/linux/time64.h | 2 +-
kernel/time/posix-stubs.c | 3 ++-
kernel/time/time.c | 4 ++--
4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 5fd73915c62c..f793221f4eb6 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1304,6 +1304,9 @@ int begin_new_exec(struct linux_binprm * bprm)
bprm->mm = NULL;

#ifdef CONFIG_POSIX_TIMERS
+ spin_lock_irq(&me->sighand->siglock);
+ posix_cpu_timers_exit(me);
+ spin_unlock_irq(&me->sighand->siglock);
exit_itimers(me);
flush_itimer_signals();
#endif
diff --git a/include/linux/time64.h b/include/linux/time64.h
index 2fb8232cff1d..f1bcea8c124a 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -145,7 +145,7 @@ static inline s64 timespec64_to_ns(const struct timespec64 *ts)
*
* Returns the timespec64 representation of the nsec parameter.
*/
-extern struct timespec64 ns_to_timespec64(const s64 nsec);
+extern struct timespec64 ns_to_timespec64(s64 nsec);

/**
* timespec64_add_ns - Adds nanoseconds to a timespec64
diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c
index fcb3b21d8bdc..90ea5f373e50 100644
--- a/kernel/time/posix-stubs.c
+++ b/kernel/time/posix-stubs.c
@@ -70,7 +70,7 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
return do_sys_settimeofday64(&new_tp, NULL);
}

-int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
+static int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)
{
switch (which_clock) {
case CLOCK_REALTIME:
@@ -90,6 +90,7 @@ int do_clock_gettime(clockid_t which_clock, struct timespec64 *tp)

return 0;
}
+
SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
struct __kernel_timespec __user *, tp)
{
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 29923b20e0e4..526257b3727c 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -449,7 +449,7 @@ time64_t mktime64(const unsigned int year0, const unsigned int mon0,
}
EXPORT_SYMBOL(mktime64);

-struct __kernel_old_timeval ns_to_kernel_old_timeval(const s64 nsec)
+struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec)
{
struct timespec64 ts = ns_to_timespec64(nsec);
struct __kernel_old_timeval tv;
@@ -503,7 +503,7 @@ EXPORT_SYMBOL(set_normalized_timespec64);
*
* Returns the timespec64 representation of the nsec parameter.
*/
-struct timespec64 ns_to_timespec64(const s64 nsec)
+struct timespec64 ns_to_timespec64(s64 nsec)
{
struct timespec64 ts = { 0, 0 };
s32 rem;
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