From: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Alan Maguire <alan.maguire@oracle.com>,
David Ahern <dsahern@gmail.com>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH 4.14 03/35] neighbor: Call __ipv4_neigh_lookup_noref in neigh_xmit
Date: Mon, 10 Jun 2019 10:10:25 +0900 [thread overview]
Message-ID: <20190610011024.utn5fft7nocabqxb@toshiba.co.jp> (raw)
In-Reply-To: <20190609164125.756810906@linuxfoundation.org>
Hi,
On Sun, Jun 09, 2019 at 06:42:09PM +0200, Greg Kroah-Hartman wrote:
> From: David Ahern <dsahern@gmail.com>
>
> [ Upstream commit 4b2a2bfeb3f056461a90bd621e8bd7d03fa47f60 ]
>
> Commit cd9ff4de0107 changed the key for IFF_POINTOPOINT devices to
> INADDR_ANY but neigh_xmit which is used for MPLS encapsulations was not
> updated to use the altered key. The result is that every packet Tx does
> a lookup on the gateway address which does not find an entry, a new one
> is created only to find the existing one in the table right before the
> insert since arp_constructor was updated to reset the primary key. This
> is seen in the allocs and destroys counters:
> ip -s -4 ntable show | head -10 | grep alloc
>
> which increase for each packet showing the unnecessary overhread.
>
> Fix by having neigh_xmit use __ipv4_neigh_lookup_noref for NEIGH_ARP_TABLE.
>
> Fixes: cd9ff4de0107 ("ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY")
> Reported-by: Alan Maguire <alan.maguire@oracle.com>
> Signed-off-by: David Ahern <dsahern@gmail.com>
> Tested-by: Alan Maguire <alan.maguire@oracle.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
This commit also requires the following commit:
commit 9b3040a6aafd7898ece7fc7efcbca71e42aa8069
Author: David Ahern <dsahern@gmail.com>
Date: Sun May 5 11:16:20 2019 -0700
ipv4: Define __ipv4_neigh_lookup_noref when CONFIG_INET is disabled
Define __ipv4_neigh_lookup_noref to return NULL when CONFIG_INET is disabled.
Fixes: 4b2a2bfeb3f0 ("neighbor: Call __ipv4_neigh_lookup_noref in neigh_xmit")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
And this is also necessary for 4.4.y, 4.14.y, 4.19.y and 5.1.y.
Please apply this commit.
Best regards,
Nobuhiro
next prev parent reply other threads:[~2019-06-10 1:10 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-09 16:42 [PATCH 4.14 00/35] 4.14.125-stable review Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 01/35] ethtool: fix potential userspace buffer overflow Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 02/35] Fix memory leak in sctp_process_init Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 03/35] neighbor: Call __ipv4_neigh_lookup_noref in neigh_xmit Greg Kroah-Hartman
2019-06-10 1:10 ` Nobuhiro Iwamatsu [this message]
2019-06-10 1:13 ` nobuhiro1.iwamatsu
2019-06-10 5:56 ` Greg KH
2019-06-09 16:42 ` [PATCH 4.14 04/35] net/mlx4_en: ethtool, Remove unsupported SFP EEPROM high pages query Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 05/35] net: rds: fix memory leak in rds_ib_flush_mr_pool Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 06/35] pktgen: do not sleep with the thread lock held Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 07/35] ipv6: fix EFAULT on sendto with icmpv6 and hdrincl Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 08/35] ipv6: use READ_ONCE() for inet->hdrincl as in ipv4 Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 09/35] net: sfp: read eeprom in maximum 16 byte increments Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 10/35] ipv6: fix the check before getting the cookie in rt6_get_cookie Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 11/35] Revert "fib_rules: fix error in backport of e9919a24d302 ("fib_rules: return 0...")" Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 12/35] Revert "fib_rules: return 0 directly if an exactly same rule exists when NLM_F_EXCL not supplied" Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 13/35] rcu: locking and unlocking need to always be at least barriers Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 14/35] parisc: Use implicit space register selection for loading the coherence index of I/O pdirs Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 15/35] fuse: fallocate: fix return with locked inode Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 16/35] pstore: Remove needless lock during console writes Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 17/35] pstore: Convert buf_lock to semaphore Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 18/35] pstore/ram: Run without kernel crash dump region Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 19/35] x86/power: Fix nosmt vs hibernation triple fault during resume Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 20/35] i2c: xiic: Add max_read_len quirk Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 21/35] MIPS: Bounds check virt_addr_valid Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 22/35] MIPS: pistachio: Build uImage.gz by default Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 23/35] Revert "MIPS: perf: ath79: Fix perfcount IRQ assignment" Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 24/35] genwqe: Prevent an integer overflow in the ioctl Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 25/35] test_firmware: Use correct snprintf() limit Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 26/35] drm/gma500/cdv: Check vbt config bits when detecting lvds panels Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 27/35] drm/nouveau: add kconfig option to turn off nouveau legacy contexts. (v3) Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 28/35] drm/amdgpu/psp: move psp version specific function pointers to early_init Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 29/35] drm/radeon: prefer lower reference dividers Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 30/35] drm/i915: Fix I915_EXEC_RING_MASK Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 31/35] drm/i915/fbc: disable framebuffer compression on GeminiLake Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 32/35] TTY: serial_core, add ->install Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 33/35] qmi_wwan: Add quirk for Quectel dynamic config Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 34/35] fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock Greg Kroah-Hartman
2019-06-09 16:42 ` [PATCH 4.14 35/35] fuse: Add FOPEN_STREAM to use stream_open() Greg Kroah-Hartman
2019-06-10 7:27 ` [PATCH 4.14 00/35] 4.14.125-stable review Naresh Kamboju
2019-06-10 8:50 ` Jon Hunter
2019-06-10 14:43 ` Guenter Roeck
2019-06-10 21:56 ` shuah
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