* Re: kernel BUG observed during ndctl Unit Tests on 4.8.0-rc2
[not found] ` <4a567c42-3434-a558-5bff-8b482c754259-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
@ 2016-09-06 6:36 ` yizhan
0 siblings, 0 replies; 4+ messages in thread
From: yizhan @ 2016-09-06 6:36 UTC (permalink / raw)
To: Dan Williams; +Cc: linux-nvdimm
On 08/24/2016 03:45 AM, yizhan wrote:
>
>
> On 08/23/2016 07:08 AM, Dan Williams wrote:
>> On Mon, Aug 22, 2016 at 12:52 AM, Yi Zhang <yizhan-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>>> Hi folks
>>>
>>> I'm testing ndctl unit test on 4.8.0-rc2, always can encounter the
>>> kernel BUG, anyone can help check it?
>>> I have list all the log below:
>>>
>>> http://pastebin.com/JUiEGQUE -> devm_nvdimm_memremap+0x18d/0x280
>>> http://pastebin.com/MmazZj3K -> kfree+0x56/0x170
>>> http://pastebin.com/4kbucxPy -> kfree+0x56/0x170
>>> http://pastebin.com/kBsBicFM -> kfree+0x56/0x170
>>> http://pastebin.com/CaVKTYzc -> strcmp+0x16/0x30
>>> http://pastebin.com/pFWYWTDg -> kfree+0x56/0x170
>>>
>>> Another server which have NVDIMM:
>>> http://pastebin.com/y25QT2Dz -> __kmalloc+0x9d/0x200
>>> http://pastebin.com/z6xp2Usa -> kfree+0x56/0x170
>>> http://pastebin.com/eqmiqivN -> kfree+0x56/0x170
>>> http://pastebin.com/jA0RHSbf -> kmem_cache_free+0x65/0x1e0
>> Can you send your kernel config and the full log since boot? When did
>> this start failing? I.e. might it be possible to bisect?
> Hi Dan
>
> Finally found below commit introduced this bug by git bisect.
> 7bfe97c tools/testing/nvdimm: add virtual ramdisk range
>
> Below is the config and boot log:
> http://pastebin.com/TnLA5abh kernel config
> http://pastebin.com/WDvjmH47 kernel dmesg
>
> Pls let me if you need more info.
>
> Thanks
> Yi
>
Still can reproduce this bug with latest 4.8.0-rc5
[ 402.501425] nfit_test_iomap: loading out-of-tree module taints kernel.
[ 402.682944] nfit_test nfit_test.0: found a zero length table '0'
parsing nfit
[ 407.818445] nd_pmem namespace9.0: unable to guarantee persistence of
writes
[ 411.881093] BUG: unable to handle kernel paging request at
ffffeb04001f21e0
[ 411.914752] IP: [<ffffffff81203946>] kfree+0x56/0x170
[ 411.939037] PGD 0
[ 411.949104] Oops: 0000 [#1] SMP
[ 411.965429] Modules linked in: dax_pmem(O) dax(O) nd_pmem(O)
nd_blk(O) nd_btt(O) nfit_test(O) nfit(O) libnvdimm(O) nfit_test_iomap(O)
nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache intel_rapl sb_edac
edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm
irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel
lrw gf128mul glue_helper ablk_helper cryptd ipmi_ssif nfsd iTCO_wdt
iTCO_vendor_support sg hpwdt hpilo auth_rpcgss pcspkr ioatdma ipmi_si
nfs_acl lpc_ich shpchp dca wmi ipmi_msghandler lockd acpi_power_meter
dm_multipath pcc_cpufreq acpi_cpufreq grace sunrpc ip_tables xfs
libcrc32c sd_mod mgag200 i2c_algo_bit drm_kms_helper syscopyarea
sysfillrect sysimgblt fb_sys_fops ttm drm crc32c_intel serio_raw tg3
hpsa i2c_core ptp scsi_transport_sas pps_core fjes dm_mirror
dm_region_hash dm_log dm_mod
[ 412.301477] CPU: 16 PID: 1951 Comm: lt-libndctl Tainted: G
O 4.8.0-rc5 #1
[ 412.337398] Hardware name: HP ProLiant DL580 Gen8, BIOS P79 05/06/2015
[ 412.366477] task: ffff8810567cc380 task.stack: ffff881057ad8000
[ 412.393089] RIP: 0010:[<ffffffff81203946>] [<ffffffff81203946>]
kfree+0x56/0x170
[ 412.426805] RSP: 0018:ffff881057adba98 EFLAGS: 00010286
[ 412.452199] RAX: 00000104001f21c0 RBX: ffffc90007c87000 RCX:
0000000000000000
[ 412.488005] RDX: 000077ff80000000 RSI: ffff881057adbb00 RDI:
ffffc90007c87000
[ 412.522869] RBP: ffff881057adbab0 R08: ffff881057adbad8 R09:
0000000000000000
[ 412.554930] R10: ffff88017fc07ac0 R11: ffffeb04001f21c0 R12:
ffffc90007c87000
[ 412.586984] R13: ffffffff812f6156 R14: ffff881057adbae8 R15:
0000000000000000
[ 412.619183] FS: 00007f9c0a713780(0000) GS:ffff88085ee00000(0000)
knlGS:0000000000000000
[ 412.655536] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 412.681360] CR2: ffffeb04001f21e0 CR3: 0000001042fbc000 CR4:
00000000001406e0
[ 412.713390] Stack:
[ 412.722366] 000000000000001d ffffc90007c87000 ffff881057adbb74
ffff881057adbb50
[ 412.755570] ffffffff812f6156 000000000000001d 00000000810cba60
0000000000000000
[ 412.788496] 0000000000000000 0000000000000000 0000000000000000
0000000000000000
[ 412.822277] Call Trace:
[ 412.833915] [<ffffffff812f6156>]
security_context_to_sid_core+0x186/0x260
[ 412.867033] [<ffffffff812f83d6>] security_context_to_sid+0x16/0x20
[ 412.898278] [<ffffffff812e60c2>] selinux_inode_setsecurity+0x72/0x120
[ 412.928125] [<ffffffff812e618d>] selinux_inode_notifysecctx+0x1d/0x20
[ 412.957585] [<ffffffff812dc3a3>] security_inode_notifysecctx+0x43/0x60
[ 412.990427] [<ffffffff812ac252>] kernfs_refresh_inode+0xa2/0xe0
[ 413.020435] [<ffffffff812ac31d>] kernfs_iop_permission+0x3d/0x60
[ 413.049525] [<ffffffff812369a4>] __inode_permission+0x64/0xd0
[ 413.075774] [<ffffffff81236a28>] inode_permission+0x18/0x50
[ 413.101493] [<ffffffff81239d5b>] link_path_walk+0x30b/0x600
[ 413.126994] [<ffffffff81238086>] ? path_init+0x1f6/0x340
[ 413.151317] [<ffffffff8123a14f>] path_lookupat+0x7f/0x110
[ 413.175933] [<ffffffff8123bebf>] filename_lookup+0xaf/0x190
[ 413.200997] [<ffffffff8123ba63>] ? putname+0x53/0x60
[ 413.223639] [<ffffffff8123beff>] ? filename_lookup+0xef/0x190
[ 413.250047] [<ffffffff81202474>] ? kmem_cache_alloc+0x154/0x1a0
[ 413.277021] [<ffffffff8123babf>] ? getname_flags+0x4f/0x1f0
[ 413.302405] [<ffffffff8123badf>] ? getname_flags+0x6f/0x1f0
[ 413.327767] [<ffffffff8123c076>] user_path_at_empty+0x36/0x40
[ 413.353934] [<ffffffff81230ec6>] vfs_fstatat+0x66/0xc0
[ 413.377461] [<ffffffff81231501>] SYSC_newlstat+0x31/0x60
[ 413.401858] [<ffffffff8100365d>] ? syscall_trace_enter+0x1dd/0x2c0
[ 413.430018] [<ffffffff811395eb>] ? __audit_syscall_exit+0x1db/0x260
[ 413.458637] [<ffffffff8123170e>] SyS_newlstat+0xe/0x10
[ 413.482238] [<ffffffff81003a47>] do_syscall_64+0x67/0x160
[ 413.510359] [<ffffffff816f8b21>] entry_SYSCALL64_slow_path+0x25/0x25
[ 413.542055] Code: 00 00 00 80 ff 77 00 00 49 bb 00 00 00 00 00 ea ff
ff 48 01 d8 48 0f 42 15 d8 96 a0 00 48 01 d0 48 c1 e8 0c 48 c1 e0 06 49
01 c3 <49> 8b 43 20 a8 01 0f 85 f7 00 00 00 49 8b 43 20 a8 01 0f 85 e2
[ 413.628559] RIP [<ffffffff81203946>] kfree+0x56/0x170
[ 413.651651] RSP <ffff881057adba98>
[ 413.667275] CR2: ffffeb04001f21e0
[ 413.682239] ---[ end trace bd155b1b1dec867c ]---
[ 413.708253] Kernel panic - not syncing: Fatal exception
[ 413.731959] Kernel Offset: disabled
[ 413.752663] ---[ end Kernel panic - not syncing: Fatal exception
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