mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 16:30:52 +07:00
6fec64e1c9
The posix timer ti_overrun handling is broken because the forwarding functions can return a huge number of overruns which does not fit in an int. As a consequence timer_getoverrun(2) and siginfo::si_overrun can turn into random number generators. As a first step to address that let the timer_forward() callbacks return the full 64 bit value. Cast it to (int) temporarily until k_itimer::ti_overrun is converted to 64bit and the conversion to user space visible values is sanitized. Reported-by: Team OWL337 <icytxw@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Link: https://lkml.kernel.org/r/20180626132704.922098090@linutronix.de
42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#define TIMER_RETRY 1
|
|
|
|
struct k_clock {
|
|
int (*clock_getres)(const clockid_t which_clock,
|
|
struct timespec64 *tp);
|
|
int (*clock_set)(const clockid_t which_clock,
|
|
const struct timespec64 *tp);
|
|
int (*clock_get)(const clockid_t which_clock,
|
|
struct timespec64 *tp);
|
|
int (*clock_adj)(const clockid_t which_clock, struct timex *tx);
|
|
int (*timer_create)(struct k_itimer *timer);
|
|
int (*nsleep)(const clockid_t which_clock, int flags,
|
|
const struct timespec64 *);
|
|
int (*timer_set)(struct k_itimer *timr, int flags,
|
|
struct itimerspec64 *new_setting,
|
|
struct itimerspec64 *old_setting);
|
|
int (*timer_del)(struct k_itimer *timr);
|
|
void (*timer_get)(struct k_itimer *timr,
|
|
struct itimerspec64 *cur_setting);
|
|
void (*timer_rearm)(struct k_itimer *timr);
|
|
s64 (*timer_forward)(struct k_itimer *timr, ktime_t now);
|
|
ktime_t (*timer_remaining)(struct k_itimer *timr, ktime_t now);
|
|
int (*timer_try_to_cancel)(struct k_itimer *timr);
|
|
void (*timer_arm)(struct k_itimer *timr, ktime_t expires,
|
|
bool absolute, bool sigev_none);
|
|
};
|
|
|
|
extern const struct k_clock clock_posix_cpu;
|
|
extern const struct k_clock clock_posix_dynamic;
|
|
extern const struct k_clock clock_process;
|
|
extern const struct k_clock clock_thread;
|
|
extern const struct k_clock alarm_clock;
|
|
|
|
int posix_timer_event(struct k_itimer *timr, int si_private);
|
|
|
|
void common_timer_get(struct k_itimer *timr, struct itimerspec64 *cur_setting);
|
|
int common_timer_set(struct k_itimer *timr, int flags,
|
|
struct itimerspec64 *new_setting,
|
|
struct itimerspec64 *old_setting);
|
|
int common_timer_del(struct k_itimer *timer);
|