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fix unsynchronized decrement of thread count on pthread_create error

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commit 8f11e6127f wrongly documented
that all changes to libc.threads_minus_1 were guarded by the thread
list lock, but the decrement for failed SYS_clone took place after the
thread list lock was released.
This commit is contained in:
Rich Felker 2019-09-06 15:52:00 -04:00
parent a882841baf
commit dd0a23dd9e
1 changed files with 2 additions and 1 deletions
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3
src/thread/pthread_create.c
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@ -356,13 +356,14 @@ int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict att
new->prev = self;
new->next->prev = new;
new->prev->next = new;
} else {
libc.threads_minus_1--;
}
__tl_unlock();
__restore_sigs(&set);
__release_ptc();
if (ret < 0) {
libc.threads_minus_1--;
if (map) __munmap(map, size);
return EAGAIN;
}