lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sun, 6 Sep 2020 20:13:11 -0700
From:   Jakub Kicinski <>
To:     Michael Chan <>
Cc:     David Miller <>,
        Netdev <>,
        Vasundhara Volam <>
Subject: Re: [PATCH net 2/2] bnxt_en: Fix NULL ptr dereference crash in

On Sun, 6 Sep 2020 15:07:02 -0700 Michael Chan wrote:
> On Sun, Sep 6, 2020 at 12:25 PM Jakub Kicinski <> wrote:
> >
> > devlink can itself scheduler a recovery via:
> >
> >   bnxt_fw_fatal_recover() -> bnxt_fw_reset()
> >  
> Yes, this is how it is initiated when we call devlink_health_report()
> to report the error condition.  From bnxt_fw_reset(), we use a
> workqueue because we have to go through many states, requiring
> sleeping/polling to transition through the states.
> > no? Maybe don't make the devlink recovery path need to go via a
> > workqueue?  
> Current implementation is going through a work queue.

What I'm saying is the code looks like this after this patch:

+	clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
+	bnxt_cancel_sp_work(bp);
+	bp->sp_event = 0;
 	bnxt_dl_fw_reporters_destroy(bp, true);

It cancels the work, _then_ destroys the reporter. But I think the
reported can be used to schedule a recovery from command line. So the
work may get re-scheduled after it has been canceled.

devlink_nl_cmd_health_reporter_recover_doit() -> bnxt_fw_fatal_recover() ->
  bnxt_fw_reset() -> bnxt_queue_fw_reset_work()

What am I missing?

Powered by blists - more mailing lists