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Message-ID: <20220727183647.23ae46f8@kernel.org> Date: Wed, 27 Jul 2022 18:36:47 -0700 From: Jakub Kicinski <kuba@...nel.org> To: Duoming Zhou <duoming@....edu.cn> Cc: linux-hams@...r.kernel.org, ralf@...ux-mips.org, davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net v2] netrom: fix sleep in atomic context bugs in timer handlers On Tue, 26 Jul 2022 11:24:20 +0800 Duoming Zhou wrote: > nr_heartbeat_expiry > nr_write_internal > nr_transmit_buffer void nr_transmit_buffer(struct sock *sk, struct sk_buff *skb) { [...] if (!nr_route_frame(skb, NULL)) { > nr_route_frame int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25) { [...] if (ax25 != NULL) { ret = nr_add_node(nr_src, "", &ax25->dest_addr, ax25->digipeat, ax25 must be NULL on this path AFAICT. > nr_add_node > kmemdup(..,GFP_KERNEL) //may sleep
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