Netdev Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Pavel Skripkin <paskripkin@gmail.com>
To: syzbot <syzbot+abd2e0dafb481b621869@syzkaller.appspotmail.com>
Cc: krzysztof.kozlowski@canonical.com, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] INFO: task hung in port100_probe
Date: Tue, 22 Jun 2021 19:07:01 +0300	[thread overview]
Message-ID: <20210622190701.653d94ca@gmail.com> (raw)
In-Reply-To: <000000000000c644cd05c55ca652@google.com>

[-- Attachment #1: Type: text/plain, Size: 1245 bytes --]

On Tue, 22 Jun 2021 08:43:29 -0700
syzbot <syzbot+abd2e0dafb481b621869@syzkaller.appspotmail.com> wrote:

> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    fd0aa1a4 Merge tag 'for-linus' of
> git://git.kernel.org/pub.. git tree:       upstream
> console output:
> https://syzkaller.appspot.com/x/log.txt?x=13e1500c300000 kernel
> config:  https://syzkaller.appspot.com/x/.config?x=7ca96a2d153c74b0
> dashboard link:
> https://syzkaller.appspot.com/bug?extid=abd2e0dafb481b621869 syz
> repro:
> https://syzkaller.appspot.com/x/repro.syz?x=1792e284300000 C
> reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13ad9d48300000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the
> commit: Reported-by:
> syzbot+abd2e0dafb481b621869@syzkaller.appspotmail.com
> 
> INFO: task kworker/0:1:7 blocked for more than 143 seconds.
>       Not tainted 5.13.0-rc6-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
> message. task:kworker/0:1     state:D stack:25584 pid:    7 ppid:
> 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event

Hmmm, maybe this will work


#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master




With regards,
Pavel Skripkin

[-- Attachment #2: 0001-nfc-add-missing-complete-to-avoid-hung.patch --]
[-- Type: text/x-patch, Size: 1525 bytes --]

From 450d464332a8dbf5a915c1447af554ca84a163bb Mon Sep 17 00:00:00 2001
From: Pavel Skripkin <paskripkin@gmail.com>
Date: Tue, 22 Jun 2021 19:00:03 +0300
Subject: [PATCH] nfc: add missing complete() to avoid hung

/* .... */

Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
---
 drivers/nfc/port100.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/nfc/port100.c b/drivers/nfc/port100.c
index 8e4d355dc3ae..c8c421af49b7 100644
--- a/drivers/nfc/port100.c
+++ b/drivers/nfc/port100.c
@@ -805,9 +805,15 @@ static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
 	port100_tx_frame_finish(skb->data);
 }
 
+struct port100_sync_cmd_response {
+	struct sk_buff *resp;
+	struct completion done;
+};
+
 static void port100_send_async_complete(struct port100 *dev)
 {
 	struct port100_cmd *cmd = dev->cmd;
+	struct port100_sync_cmd_response *cmd_resp = cmd->complete_cb_context;
 	int status = cmd->status;
 
 	struct sk_buff *req = cmd->req;
@@ -831,6 +837,7 @@ static void port100_send_async_complete(struct port100 *dev)
 	cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 
 done:
+	complete(&cmd_resp->done);
 	kfree(cmd);
 }
 
@@ -883,11 +890,6 @@ static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
 	return rc;
 }
 
-struct port100_sync_cmd_response {
-	struct sk_buff *resp;
-	struct completion done;
-};
-
 static void port100_wq_cmd_complete(struct work_struct *work)
 {
 	struct port100 *dev = container_of(work, struct port100,
-- 
2.32.0


  reply	other threads:[~2021-06-22 16:07 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-22 15:43 syzbot
2021-06-22 16:07 ` Pavel Skripkin [this message]
2021-06-22 16:21   ` syzbot
2021-07-22 14:20 ` Krzysztof Kozlowski
2021-07-22 14:23   ` Krzysztof Kozlowski
2021-07-22 14:47   ` Alan Stern
2021-07-23  9:05     ` Krzysztof Kozlowski
2021-07-23 13:07       ` Alan Stern
2021-10-20 20:56     ` Krzysztof Kozlowski
2021-10-20 22:05       ` Alan Stern
2021-10-25 14:57         ` Krzysztof Kozlowski
2021-10-25 16:22           ` Alan Stern
2021-10-25 17:13             ` Krzysztof Kozlowski
2021-10-25 18:54               ` Alan Stern
2022-03-09 19:33 ` Pavel Skripkin
2022-03-09 19:56   ` syzbot
     [not found] <20220310084247.1148-1-hdanton@sina.com>
2022-03-10 14:22 ` syzbot
     [not found] ` <20220311053751.1226-1-hdanton@sina.com>
2022-03-11 19:17   ` Pavel Skripkin
2022-03-11 19:18     ` syzbot
2022-03-11 19:19       ` Pavel Skripkin
2022-03-11 19:32         ` syzbot
     [not found]   ` <20220312005624.1310-1-hdanton@sina.com>
2022-03-12 10:36     ` Pavel Skripkin
     [not found]     ` <20220312115854.1399-1-hdanton@sina.com>
2022-03-12 12:44       ` Pavel Skripkin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210622190701.653d94ca@gmail.com \
    --to=paskripkin@gmail.com \
    --cc=krzysztof.kozlowski@canonical.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=syzbot+abd2e0dafb481b621869@syzkaller.appspotmail.com \
    --cc=syzkaller-bugs@googlegroups.com \
    --subject='Re: [syzbot] INFO: task hung in port100_probe' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).