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Date: Fri, 6 Mar 2015 14:05:35 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Rusty Russell <rusty@...tcorp.com.au>
Cc: fengguang.wu@...el.com, LKP <lkp@...org>,
linux-kernel@...r.kernel.org
Subject: [cpumask] WARNING: CPU: 0 PID: 0 at lib/list_debug.c:29 __list_add()
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux.git
commit f754909a13e848900abee1014ca29b9b4e33b6ff
Author: Rusty Russell <rusty@...tcorp.com.au>
AuthorDate: Thu Mar 5 10:49:19 2015 +1030
Commit: Rusty Russell <rusty@...tcorp.com.au>
CommitDate: Thu Mar 5 13:37:09 2015 +1030
cpumask: only allocate nr_cpumask_bits.
Now we'll find out the hard way if anyone has CPUMASK_OFFSTACK and is
returning these or assigning them.
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
+------------------------------------------------------------------+------------+------------+------------+
| | 7928baeec5 | f754909a13 | e9d45bb15b |
+------------------------------------------------------------------+------------+------------+------------+
| boot_successes | 44 | 0 | 0 |
| boot_failures | 16 | 20 | 12 |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 16 | | |
| backtrace:serio_handle_event | 16 | | |
| backtrace:__kmalloc | 1 | | |
| backtrace:device_private_init | 1 | | |
| WARNING:at_lib/list_debug.c:#__list_add() | 0 | 20 | 12 |
| BUG:unable_to_handle_kernel | 0 | 20 | 12 |
| Oops | 0 | 20 | 12 |
| RIP:arch_early_ioapic_init | 0 | 20 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 20 | 12 |
| backtrace:kmem_cache_create | 0 | 20 | 12 |
| backtrace:idr_init_cache | 0 | 20 | 12 |
| backtrace:arch_early_ioapic_init | 0 | 20 | 12 |
| backtrace:arch_early_irq_init | 0 | 20 | 12 |
| backtrace:early_irq_init | 0 | 20 | 12 |
+------------------------------------------------------------------+------------+------------+------------+
[ 0.000000] Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
[ 0.000000] Memory: 290172K/327160K available (5970K kernel code, 1525K rwdata, 2844K rodata, 788K init, 13824K bss, 36988K reserved, 0K cma-reserved)
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: CPU: 0 PID: 0 at lib/list_debug.c:29 __list_add+0x70/0xd0()
[ 0.000000] list_add corruption. next->prev should be prev (ffffffff83ba0240), but was (null). (next=ffff880013401030).
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.0.0-rc2-00166-gf754909 #35
[ 0.000000] ffffffff83a064f0 ffffffff83aa3e18 ffffffff837c9478 0000000000000000
[ 0.000000] ffffffff83aa3e68 ffffffff83aa3e58 ffffffff83249530 ffffffff83aa3e48
[ 0.000000] ffff880013402050 ffff880013401030 ffffffff83ba0240 0000000000000000
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff837c9478>] dump_stack+0x4f/0x7b
[ 0.000000] [<ffffffff83249530>] warn_slowpath_common+0x80/0xc0
[ 0.000000] [<ffffffff832495b1>] warn_slowpath_fmt+0x41/0x50
[ 0.000000] [<ffffffff83569830>] __list_add+0x70/0xd0
[ 0.000000] [<ffffffff832fa116>] kmem_cache_create+0xf6/0x1f0
[ 0.000000] [<ffffffff83c5041b>] idr_init_cache+0x1f/0x28
[ 0.000000] [<ffffffff83c30d4e>] start_kernel+0x276/0x50e
[ 0.000000] [<ffffffff83c30120>] ? early_idt_handlers+0x120/0x120
[ 0.000000] [<ffffffff83c304b3>] x86_64_start_reservations+0x2a/0x2c
[ 0.000000] [<ffffffff83c305b2>] x86_64_start_kernel+0xfd/0x10c
[ 0.000000] ---[ end trace cb88537fdc8fa200 ]---
[ 0.000000] Preemptible hierarchical RCU implementation.
git bisect start e9d45bb15ba89a3ef7b6dde0d12d15d4964e74de 13a7a6ac0a11197edcd0f756a035f472b42cdf8b --
git bisect good 584c906002a75a94306bb1532e5c9d0a64ce6379 # 12:23 20+ 0 Merge 'nfs/devel' into devel-snb-smoke-201503051145
git bisect good a0f973d320468f2c5d72bc9d12bc5493723c17d1 # 12:38 20+ 0 Merge 'rusty/virtio-next' into devel-snb-smoke-201503051145
git bisect bad ab49e5a43e09fc7540085082485fceb22b02d5e5 # 12:45 0- 20 Merge 'rusty/cpumask-next' into devel-snb-smoke-201503051145
git bisect good e6f4c1436a8d2a38c1c2246074837b20387edc44 # 13:03 20+ 20 mips: fix up obsolete cpu function usage.
git bisect good c3fa335e22078976dcdb6f3a9228ccd000c3b53e # 13:14 20+ 3 blackfin: fix up obsolete cpu function usage.
git bisect good c099221e5944e36612c4079d888a38530a667645 # 13:27 20+ 20 cpumask: remove deprecated functions.
git bisect bad f754909a13e848900abee1014ca29b9b4e33b6ff # 13:34 0- 20 cpumask: only allocate nr_cpumask_bits.
git bisect good 7928baeec50516d4f632f2b9a66925a3fc1126b0 # 13:56 20+ 0 Fix weird uses of num_online_cpus().
# first bad commit: [f754909a13e848900abee1014ca29b9b4e33b6ff] cpumask: only allocate nr_cpumask_bits.
git bisect good 7928baeec50516d4f632f2b9a66925a3fc1126b0 # 13:58 60+ 16 Fix weird uses of num_online_cpus().
# extra tests with DEBUG_INFO
git bisect good f754909a13e848900abee1014ca29b9b4e33b6ff # 14:15 60+ 60 cpumask: only allocate nr_cpumask_bits.
# extra tests on HEAD of linux-devel/devel-snb-smoke-201503051145
git bisect bad e9d45bb15ba89a3ef7b6dde0d12d15d4964e74de # 14:15 0- 12 0day head guard for 'devel-snb-smoke-201503051145'
# extra tests on tree/branch rusty/cpumask-next
git bisect bad f754909a13e848900abee1014ca29b9b4e33b6ff # 14:23 0- 20 cpumask: only allocate nr_cpumask_bits.
# extra tests with first bad commit reverted
# extra tests on tree/branch linus/master
git bisect good 6587457b4b3d663b237a0f95ddf6e67d1828c8ea # 14:32 60+ 20 Merge tag 'dma-buf-for-4.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/sumits/dma-buf
# extra tests on tree/branch next/master
git bisect good cbbf783608bd1f177fd8b1f6498bb2481116beed # 14:52 60+ 60 Add linux-next specific files for 20150305
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-m 320
-smp 1
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
rd.udev.log-priority=err
systemd.log_target=journal
systemd.log_level=warning
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-yocto-client6-2:20150305133310:x86_64-randconfig-s0-03031804:4.0.0-rc2-00166-gf754909:35" of type "text/plain" (15945 bytes)
View attachment "config-4.0.0-rc2-00166-gf754909" of type "text/plain" (74319 bytes)
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