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Message-ID: <20180402020413.GD3795@jagdpanzerIV> Date: Mon, 2 Apr 2018 11:04:13 +0900 From: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com> To: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com> Cc: Dmitry Vyukov <dvyukov@...gle.com>, syzbot <syzbot+3f28bd18291266ec826b@...kaller.appspotmail.com>, LKML <linux-kernel@...r.kernel.org>, Petr Mladek <pmladek@...e.com>, Steven Rostedt <rostedt@...dmis.org>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>, syzkaller-bugs@...glegroups.com, Samuel Ortiz <sameo@...ux.intel.com>, David Miller <davem@...emloft.net>, linux-wireless@...r.kernel.org, netdev <netdev@...r.kernel.org> Subject: Re: INFO: rcu detected stall in vprintk_func On (04/02/18 10:54), Sergey Senozhatsky wrote: > > > If you forward the report, please keep this part and the footer. > > > > > > llcp: nfc_llcp_send_ui_frame: Could not allocate PDU > > > llcp: nfc_llcp_send_ui_frame: Could not allocate PDU > > > llcp: nfc_llcp_send_ui_frame: Could not allocate PDU > > > llcp: nfc_llcp_send_ui_frame: Could not allocate PDU [..] > diff --git a/net/nfc/llcp_core.c b/net/nfc/llcp_core.c > index ef4026a23e80..a309a27581da 100644 > --- a/net/nfc/llcp_core.c > +++ b/net/nfc/llcp_core.c > @@ -1386,7 +1386,7 @@ static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb) > > new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL); > if (new_skb == NULL) { > - pr_err("Could not allocate PDU\n"); > + pr_err_ratelimited("Could not allocate PDU\n"); > return; > } And of course I ended up patching the wrong function... What I actually meant was: --- diff --git a/net/nfc/llcp_commands.c b/net/nfc/llcp_commands.c index 2ceefa183cee..2f3becb709b8 100644 --- a/net/nfc/llcp_commands.c +++ b/net/nfc/llcp_commands.c @@ -755,7 +755,7 @@ int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, pdu = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT, frag_len + LLCP_HEADER_SIZE, &err); if (pdu == NULL) { - pr_err("Could not allocate PDU\n"); + pr_err_ratelimited("Could not allocate PDU\n"); continue; }
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