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From: Stefano Brivio <sbrivio@redhat.com>
To: Phil Sutter <phil@nwl.cc>
Cc: "Pablo Neira Ayuso" <pablo@netfilter.org>,
	netfilter-devel@vger.kernel.org,
	"Florian Westphal" <fw@strlen.de>,
	"Kadlecsik József" <kadlec@blackhole.kfki.hu>,
	"Eric Garver" <eric@garver.life>
Subject: Re: [PATCH nf-next v4 0/9] nftables: Set implementation for arbitrary concatenation of ranges
Date: Thu, 20 Feb 2020 12:04:40 +0100
Message-ID: <20200220120331.334b13b0@elisabeth> (raw)
In-Reply-To: <20200220105240.GG20005@orbyte.nwl.cc>

Hi Phil,

On Thu, 20 Feb 2020 11:52:41 +0100
Phil Sutter <phil@nwl.cc> wrote:

> Hi Stefano,
> 
> When playing with adding multiple elements, I suddenly noticed a
> disturbance in the force (general protection fault). Here's a
> reproducer:
> 
> | $NFT -f - <<EOF
> | table t {
> |         set s {
> |                 type ipv4_addr . inet_service
> |                 flags interval
> |         }
> | }
> | EOF
> | 
> | $NFT add element t s '{ 10.0.0.1 . 22-25, 10.0.0.1 . 10-20 }'
> | $NFT flush set t s
> | $NFT add element t s '{ 10.0.0.1 . 10-20, 10.0.0.1 . 22-25 }'
> 
> It is pretty reliable, though sometimes needs a second call. Looks like some
> things going on in parallel which shouldn't. Here's a typical last breath:
> 
> [   71.319848] general protection fault, probably for non-canonical address 0x6f6b6e696c2e756e: 0000 [#1] PREEMPT SMP PTI
> [   71.321540] CPU: 3 PID: 1201 Comm: kworker/3:2 Not tainted 5.6.0-rc1-00377-g2bb07f4e1d861 #192
> [   71.322746] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190711_202441-buildvm-armv7-10.arm.fedoraproject.org-2.fc31 04/01/2014
> [   71.324430] Workqueue: events nf_tables_trans_destroy_work [nf_tables]
> [   71.325387] RIP: 0010:nft_set_elem_destroy+0xa5/0x110 [nf_tables]

Ouch, thanks for reporting, I'll check in a few hours.

-- 
Stefano


      reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-21 23:17 Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 1/9] netfilter: nf_tables: add nft_setelem_parse_key() Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 2/9] netfilter: nf_tables: add NFTA_SET_ELEM_KEY_END attribute Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 3/9] netfilter: nf_tables: Support for sets with multiple ranged fields Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 4/9] bitmap: Introduce bitmap_cut(): cut bits and shift remaining Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 5/9] nf_tables: Add set type for arbitrary concatenation of ranges Stefano Brivio
2020-02-07 11:23   ` Pablo Neira Ayuso
2020-02-10 15:10     ` Stefano Brivio
2020-02-14 18:16       ` Pablo Neira Ayuso
2020-02-14 19:42         ` Stefano Brivio
2020-02-14 20:42           ` Pablo Neira Ayuso
2020-02-14 23:06             ` Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 6/9] selftests: netfilter: Introduce tests for sets with range concatenation Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 7/9] nft_set_pipapo: Prepare for vectorised implementation: alignment Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 8/9] nft_set_pipapo: Prepare for vectorised implementation: helpers Stefano Brivio
2020-01-21 23:17 ` [PATCH nf-next v4 9/9] nft_set_pipapo: Introduce AVX2-based lookup implementation Stefano Brivio
2020-01-27  6:41   ` kbuild test robot
2020-01-27  8:20 ` [PATCH nf-next v4 0/9] nftables: Set implementation for arbitrary concatenation of ranges Pablo Neira Ayuso
2020-02-20 10:52 ` Phil Sutter
2020-02-20 11:04   ` Stefano Brivio [this message]

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