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linux(4): Check that the thread tid in the thread group pid in linux_tdfind().

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MFC after:		2 weeks
This commit is contained in:
Dmitry Chagin 2022-04-25 10:21:51 +03:00
parent bbddd5881d
commit fe894a3705
1 changed files with 26 additions and 26 deletions
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52
sys/compat/linux/linux_misc.c
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@ -2710,34 +2710,34 @@ linux_tdfind(struct thread *td, lwpid_t tid, pid_t pid)
tdt = NULL;
if (tid == 0 || tid == td->td_tid) {
tdt = td;
PROC_LOCK(tdt->td_proc);
if (pid != -1 && td->td_proc->p_pid != pid)
return (NULL);
PROC_LOCK(td->td_proc);
return (td);
} else if (tid > PID_MAX)
tdt = tdfind(tid, pid);
else {
/*
* Initial thread where the tid equal to the pid.
*/
p = pfind(tid);
if (p != NULL) {
if (SV_PROC_ABI(p) != SV_ABI_LINUX) {
/*
* p is not a Linuxulator process.
*/
PROC_UNLOCK(p);
return (NULL);
}
FOREACH_THREAD_IN_PROC(p, tdt) {
em = em_find(tdt);
if (tid == em->em_tid)
return (tdt);
}
PROC_UNLOCK(p);
}
return (NULL);
}
return (tdfind(tid, pid));
return (tdt);
/*
* Initial thread where the tid equal to the pid.
*/
p = pfind(tid);
if (p != NULL) {
if (SV_PROC_ABI(p) != SV_ABI_LINUX ||
(pid != -1 && tid != pid)) {
/*
* p is not a Linuxulator process.
*/
PROC_UNLOCK(p);
return (NULL);
}
FOREACH_THREAD_IN_PROC(p, tdt) {
em = em_find(tdt);
if (tid == em->em_tid)
return (tdt);
}
PROC_UNLOCK(p);
}
return (NULL);
}
void