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130c586061
Prior, if the alloc_percpu of packet_percpu_multicore_worker_alloc
failed, the previously allocated ptr_ring wouldn't be freed. This commit
adds the missing call to ptr_ring_cleanup in the error case.
Reported-by: Sultan Alsawaf <sultan@kerneltoast.com>
Fixes: e7096c131e ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include "queueing.h"
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struct multicore_worker __percpu *
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wg_packet_percpu_multicore_worker_alloc(work_func_t function, void *ptr)
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{
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int cpu;
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struct multicore_worker __percpu *worker =
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alloc_percpu(struct multicore_worker);
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if (!worker)
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return NULL;
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for_each_possible_cpu(cpu) {
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per_cpu_ptr(worker, cpu)->ptr = ptr;
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INIT_WORK(&per_cpu_ptr(worker, cpu)->work, function);
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}
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return worker;
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}
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int wg_packet_queue_init(struct crypt_queue *queue, work_func_t function,
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bool multicore, unsigned int len)
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{
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int ret;
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memset(queue, 0, sizeof(*queue));
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ret = ptr_ring_init(&queue->ring, len, GFP_KERNEL);
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if (ret)
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return ret;
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if (function) {
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if (multicore) {
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queue->worker = wg_packet_percpu_multicore_worker_alloc(
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function, queue);
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if (!queue->worker) {
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ptr_ring_cleanup(&queue->ring, NULL);
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return -ENOMEM;
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}
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} else {
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INIT_WORK(&queue->work, function);
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}
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}
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return 0;
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}
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void wg_packet_queue_free(struct crypt_queue *queue, bool multicore)
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{
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if (multicore)
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free_percpu(queue->worker);
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WARN_ON(!__ptr_ring_empty(&queue->ring));
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ptr_ring_cleanup(&queue->ring, NULL);
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}
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