netdev - Re: softirqs are invoked while bottom halves are masked

lists.openwall.net		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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 12 Jul 2011 05:08:17 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ronny.meeus@...il.com
Cc:	eric.dumazet@...il.com, patrickdepinguin+linuxppc@...il.com,
	linuxppc-dev@...abs.org, netdev@...r.kernel.org,
	afleming@...escale.com
Subject: Re: softirqs are invoked while bottom halves are masked

From: Ronny Meeus <ronny.meeus@...il.com>
Date: Tue, 12 Jul 2011 14:03:04 +0200

> but we still see the issue "BUG: sleeping function called from invalid context":
> 
> [   91.015989] BUG: sleeping function called from invalid context at
> include/linux/skbuff.h:786
> [   91.117096] in_atomic(): 1, irqs_disabled(): 0, pid: 1865, name: NMTX_T1842
> [   91.200461] Call Trace:
> [   91.229672] [ec58bbd0] [c000789c] show_stack+0x78/0x18c (unreliable)
> [   91.305791] [ec58bc10] [c0022900] __might_sleep+0x100/0x118
> [   91.372524] [ec58bc20] [c029f8d8] dpa_tx+0x128/0x758

Because this dpa driver's transmit method is doing something else that
is not allowed in software interrupt context.

You must remove all things that might sleep in this driver's
->ndo_start_xmit method, and I do mean everything.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html