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Date: Fri, 28 Apr 2017 11:48:34 +0800
From: kernel test robot <fengguang.wu@...el.com>
To: Herbert Xu <herbert@...dor.apana.org.au>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, wfg@...ux.intel.com
Subject: [rhashtable] 6d684e5469: Kernel panic - not syncing:
rtnetlink_init: cannot initialize rtnetlink
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
commit 6d684e54690caef45cf14051ddeb7c71beeb681b
Author: Herbert Xu <herbert@...dor.apana.org.au>
AuthorDate: Thu Apr 27 13:44:51 2017 +0800
Commit: David S. Miller <davem@...emloft.net>
CommitDate: Thu Apr 27 11:48:24 2017 -0400
rhashtable: Cap total number of entries to 2^31
When max_size is not set or if it set to a sufficiently large
value, the nelems counter can overflow. This would cause havoc
with the automatic shrinking as it would then attempt to fit a
huge number of entries into a tiny hash table.
This patch fixes this by adding max_elems to struct rhashtable
to cap the number of elements. This is set to 2^31 as nelems is
not a precise count. This is sufficiently smaller than UINT_MAX
that it should be safe.
When max_size is set max_elems will be lowered to at most twice
max_size as is the status quo.
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: David S. Miller <davem@...emloft.net>
4b726e81da tcp: tcp_rack_reo_timeout() must update tp->tcp_mstamp
6d684e5469 rhashtable: Cap total number of entries to 2^31
e221c1f0fe Merge tag 'wireless-drivers-next-for-davem-2017-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
+---------------------------------------------------------------------+------------+------------+------------+
| | 4b726e81da | 6d684e5469 | e221c1f0fe |
+---------------------------------------------------------------------+------------+------------+------------+
| boot_successes | 35 | 0 | 0 |
| boot_failures | 0 | 13 | 13 |
| Kernel_panic-not_syncing:rtnetlink_init:cannot_initialize_rtnetlink | 0 | 13 | 13 |
| BUG:kernel_in_stage | 0 | 1 | 1 |
+---------------------------------------------------------------------+------------+------------+------------+
[ 0.106834] futex hash table entries: 256 (order: 3, 32768 bytes)
[ 0.148019] xor: automatically using best checksumming function avx
[ 0.148019] xor: automatically using best checksumming function avx
[ 0.152501] NET: Registered protocol family 16
[ 0.152501] NET: Registered protocol family 16
[ 0.157635] Kernel panic - not syncing: rtnetlink_init: cannot initialize rtnetlink
[ 0.157635]
[ 0.157635] Kernel panic - not syncing: rtnetlink_init: cannot initialize rtnetlink
[ 0.157635]
[ 0.162789] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.0-rc8-02028-g6d684e5 #1
[ 0.162789] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.0-rc8-02028-g6d684e5 #1
[ 0.166143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 0.166143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 0.169615] Call Trace:
[ 0.169615] Call Trace:
[ 0.170458] show_stack+0x72/0x76
[ 0.170458] show_stack+0x72/0x76
[ 0.171559] dump_stack+0x10c/0x181
[ 0.171559] dump_stack+0x10c/0x181
[ 0.172753] ? __mutex_unlock_slowpath+0x171/0x34a
[ 0.172753] ? __mutex_unlock_slowpath+0x171/0x34a
[ 0.174332] panic+0x121/0x329
[ 0.174332] panic+0x121/0x329
[ 0.175385] rtnetlink_init+0x39/0x1b7
[ 0.175385] rtnetlink_init+0x39/0x1b7
[ 0.176784] netlink_proto_init+0x1bc/0x1da
[ 0.176784] netlink_proto_init+0x1bc/0x1da
[ 0.178399] ? net_ns_init+0x19c/0x19c
[ 0.178399] ? net_ns_init+0x19c/0x19c
[ 0.180171] ? eth_offload_init+0x14/0x14
[ 0.180171] ? eth_offload_init+0x14/0x14
[ 0.182045] do_one_initcall+0xa2/0x1cc
[ 0.182045] do_one_initcall+0xa2/0x1cc
[ 0.183789] do_basic_setup+0x98/0xb8
[ 0.183789] do_basic_setup+0x98/0xb8
[ 0.185369] kernel_init_freeable+0x92/0x147
[ 0.185369] kernel_init_freeable+0x92/0x147
[ 0.187076] ? rest_init+0x170/0x170
[ 0.187076] ? rest_init+0x170/0x170
[ 0.188694] kernel_init+0xe/0x171
[ 0.188694] kernel_init+0xe/0x171
[ 0.190235] ret_from_fork+0x31/0x40
[ 0.190235] ret_from_fork+0x31/0x40
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start d1c34825a799a7ba4693bf46fbc79238aed374e6 5a7ad1146caa895ad718a534399e38bd2ba721b7 --
git bisect good c6616d396b8b3e3c55cc66b24652a63108ea98dc # 06:18 G 11 0 0 0 Merge 'linux-review/Jerry-Snitselaar/tpm-print-tpm-error-code-in-hex-for-TPM2-0-devices/20170428-043331' into devel-catchup-201704280512
git bisect good b25b2abcfd0401937550e1d1806d83d796f1a043 # 06:50 G 10 0 2 2 Merge 'iio/fixes-togreg' into devel-catchup-201704280512
git bisect bad d03caeb5c291c2fa03c57c5835677986c040913a # 07:03 B 0 2 12 0 Merge 'net-next/master' into devel-catchup-201704280512
git bisect good a195fe56e7785f560ddf35293946bb4f9b024bf0 # 07:32 G 11 0 0 0 Merge 'linux-review/Kirill-Tkhai/pid_ns-Introduce-ioctl-to-set-vector-of-ns_last_pid-s-on-ns-hierarhy/20170428-035028' into devel-catchup-201704280512
git bisect good aa59004bdc2e6569a7101fe196a56c6bd58b12d8 # 07:56 G 11 0 0 0 s390/qeth: use QDIO_*_QFMT defines
git bisect good fada43ccc84e225fe8d3804878a4028def7f85a5 # 08:09 G 11 0 0 0 bindings: net: stmmac: add missing note about LPI interrupt
git bisect good a0597834dc0e1af68f48f92b31617b360a14dfc8 # 08:28 G 11 0 0 0 rt2800: fix mt7620 E2 channel registers
git bisect good 9b5381637e2baecf14433452d349ca44db72e9e5 # 08:45 G 11 0 0 0 Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
git bisect good 0e43d1009d64afcc57bfb5155f1a36c395fac178 # 09:01 G 11 0 0 0 Merge branch 'bpf-misc-cleanups'
git bisect good 36784277c59bdfce8b90233c85e957ae4ee702fc # 09:17 G 11 0 0 0 Merge branch 'l2tpeth-info'
git bisect good 128eda86bebeacefb0fcc64cab0155aa76857c92 # 09:31 G 11 0 0 0 tcp: do not pass timestamp to tcp_rack_mark_lost()
git bisect good 4c5e7a2c0501bd531aad1d0378c589a92cb3cc31 # 09:43 G 11 0 0 0 dt-bindings: mdio: Clarify binding document
git bisect good 78a57b482aa53b040fbc2b2ef0208b54f004161b # 09:57 G 11 0 0 2 virtio-net: on tx, only call napi_disable if tx napi is on
git bisect good 4b726e81dab2cefefd2c1cb00e3074ac0eec4b15 # 10:10 G 11 0 0 0 tcp: tcp_rack_reo_timeout() must update tp->tcp_mstamp
git bisect bad 3993f2cb983b2100409851f7b2abb21d685ea19c # 10:22 B 0 1 11 0 samples/bpf: Add support for SKB_MODE to xdp1 and xdp_tx_iptunnel
git bisect bad 6d684e54690caef45cf14051ddeb7c71beeb681b # 10:37 B 0 1 11 0 rhashtable: Cap total number of entries to 2^31
# first bad commit: [6d684e54690caef45cf14051ddeb7c71beeb681b] rhashtable: Cap total number of entries to 2^31
git bisect good 4b726e81dab2cefefd2c1cb00e3074ac0eec4b15 # 10:48 G 31 0 0 0 tcp: tcp_rack_reo_timeout() must update tp->tcp_mstamp
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad 6d684e54690caef45cf14051ddeb7c71beeb681b # 11:03 B 0 5 15 0 rhashtable: Cap total number of entries to 2^31
# extra tests on HEAD of linux-devel/devel-catchup-201704280512
git bisect bad d1c34825a799a7ba4693bf46fbc79238aed374e6 # 11:08 B 0 17 30 0 0day head guard for 'devel-catchup-201704280512'
# extra tests on tree/branch net-next/master
git bisect bad e221c1f0fe2590042b4f8c3a8ccccd8e7bed2c31 # 11:30 B 0 6 16 0 Merge tag 'wireless-drivers-next-for-davem-2017-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
# extra tests with first bad commit reverted
git bisect good 4c6425d9630c7a235c8a6144aeac0dd5449cc903 # 11:48 G 11 0 0 0 Revert "rhashtable: Cap total number of entries to 2^31"
---
0-DAY kernel test infrastructure Open Source Technology Center
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