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sched/clock Add special handling for TCB null pointer cases

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Adding a judgment in the code that null return values are not referenced for dereference

Signed-off-by: zhuanglin <zhuanglin@xiaomi.com>
This commit is contained in:
zhuanglin 2023-09-19 14:22:11 +08:00 • committed by Xiang Xiao
parent 2db471fab3
commit 13ee3f8117
1 changed files with 28 additions and 11 deletions
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39
sched/clock/clock_gettime.c
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@ -153,7 +153,14 @@ int clock_gettime(clockid_t clock_id, struct timespec *tp)
tcb = nxsched_get_tcb(pid);
}
up_perf_convert(tcb->run_time, tp);
if (tcb != NULL)
{
up_perf_convert(tcb->run_time, tp);
}
else
{
ret = -EFAULT;
}
}
else if (clock_type == CLOCK_PROCESS_CPUTIME_ID)
{
@ -174,18 +181,28 @@ int clock_gettime(clockid_t clock_id, struct timespec *tp)
tcb = nxsched_get_tcb(pid);
}
group = tcb->group;
runtime = 0;
flags = enter_critical_section();
for (i = group->tg_nmembers - 1; i >= 0; i--)
if (tcb != NULL)
{
tcb = nxsched_get_tcb(group->tg_members[i]);
runtime += tcb->run_time;
}
group = tcb->group;
runtime = 0;
leave_critical_section(flags);
up_perf_convert(runtime, tp);
flags = enter_critical_section();
for (i = group->tg_nmembers - 1; i >= 0; i--)
{
tcb = nxsched_get_tcb(group->tg_members[i]);
if (tcb != NULL)
{
runtime += tcb->run_time;
}
}
leave_critical_section(flags);
up_perf_convert(runtime, tp);
}
else
{
ret = -EFAULT;
}
}
#endif
else