Re: 4.1-rc6 radi5 OOPS

[NeilBrown <neilb@suse.de>]

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On Wed, 03 Jun 2015 16:20:21 -0400 Jes Sorensen <Jes.Sorensen@redhat.com>
wrote:

> Neil,
> 
> I was running testing on the current 4.1-rc6 tree (Linus' top of trunk
> 8cd9234c64c584432f6992fe944ca9e46ca8ea76) and I am seeing the following
> OOPS which is reproducible.
> 
> It shows up when running the mdadm test suite, 07changelevelintr to be
> specific.
> 
> Is this something you have seen?
> 
> Cheers,
> Jes
> 
> ------------[ cut here ]------------
> kernel BUG at drivers/md/raid5.c:5391!

No, I haven't seen that.  And I've been running the test suite quite a bit
lately.

Can you get it to print out the relevant numbers?  Include
readpos/writepos/safepos too.

Thanks,
NeilBrown


> invalid opcode: 0000 [#1] SMP 
> Modules linked in: raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 iptable_filter ip_tables tun bridge stp llc xfs x86_pkg_temp_thermal coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel libcrc32c aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd ppdev raid0 microcode pcspkr iTCO_wdt iTCO_vendor_support parport_pc i2c_i801 i2c_core parport shpchp lpc_ich mfd_core video acpi_cpufreq nfsd auth_rpcgss oid_registry exportfs nfs_acl lockd grace sunrpc uinput autofs4 ext4 mbcache jbd2 sd_mod e1000e ptp pps_core ahci r8169 mii libahci dm_mirror dm_region_hash dm_log dm_mod ipv6
> CPU: 0 PID: 15142 Comm: md0_resync Tainted: G        W       4.1.0-rc6+ #2
> Hardware name: Intel Corporation S1200BTL/S1200BTL, BIOS S1200BT.86B.02.00.0035.030220120927 03/02/2012
> task: ffff88022b2642d0 ti: ffff8802327e0000 task.ti: ffff8802327e0000
> RIP: 0010:[<ffffffffa046d6f7>]  [<ffffffffa046d6f7>] reshape_request+0x8a7/0x8b0 [raid456]
> RSP: 0018:ffff8802327e3b78  EFLAGS: 00010297
> RAX: 0000000000000200 RBX: ffff88022b130400 RCX: 0000000000000200
> RDX: 0000000000009801 RSI: 0000000000000200 RDI: 0000000000000001
> RBP: ffff8802327e3c28 R08: 00000000000001ff R09: 0000000000000000
> R10: fffffffffffffdff R11: 0000000000000001 R12: ffff8802327e3d0c
> R13: 0000000000000000 R14: ffff8802327e3d0c R15: ffff880234577000
> FS:  0000000000000000(0000) GS:ffff88023ee00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f985b677140 CR3: 0000000001a0b000 CR4: 00000000001406f0
> Stack:
>  0000000000000000 0000000000000200 0000000000000001 0000000000000000
>  0000000000000000 fffffffffffffdff 0000020000000001 ffffffff815b34d3
>  ffff88022b2642d0 ffff880235f2f080 ffff8802327e3c08 ffff8802327e4000
> Call Trace:
>  [<ffffffff815b34d3>] ? __schedule+0x383/0x8e0
>  [<ffffffffa046da2e>] sync_request+0x32e/0x3a0 [raid456]
>  [<ffffffff81092738>] ? __wake_up+0x48/0x60
>  [<ffffffff8148b974>] md_do_sync+0x8f4/0xe90
>  [<ffffffff810779bc>] ? update_rq_clock.part.89+0x1c/0x40
>  [<ffffffff81487c98>] md_thread+0x128/0x140
>  [<ffffffff81487b70>] ? find_pers+0x80/0x80
>  [<ffffffff81487b70>] ? find_pers+0x80/0x80
>  [<ffffffff81071b39>] kthread+0xc9/0xe0
>  [<ffffffff810eddd6>] ? __audit_syscall_exit+0x1e6/0x280
>  [<ffffffff81071a70>] ? kthread_create_on_node+0x170/0x170
>  [<ffffffff815b7352>] ret_from_fork+0x42/0x70
>  [<ffffffff81071a70>] ? kthread_create_on_node+0x170/0x170
> Code: 00 00 be 03 00 00 00 e8 18 50 c2 e0 49 8d 7f 50 48 c7 c2 39 55 47 a0 31 f6 e8 56 21 da e0 48 8b 45 88 e9 ae fb ff ff 0f 0b 0f 0b <0f> 0b 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 
> RIP  [<ffffffffa046d6f7>] reshape_request+0x8a7/0x8b0 [raid456]
>  RSP <ffff8802327e3b78>
> ---[ end trace 1d72a07e246912ea ]---
> BUG: unable to handle kernel NULL pointer dereference at           (null)
> IP: [<ffffffff81073c1f>] exit_creds+0x1f/0x70
> PGD bdc0c067 PUD a6697067 PMD 0 
> Oops: 0000 [#2] SMP 
> Modules linked in: raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 iptable_filter ip_tables tun bridge stp llc xfs x86_pkg_temp_thermal coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel libcrc32c aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd ppdev raid0 microcode pcspkr iTCO_wdt iTCO_vendor_support parport_pc i2c_i801 i2c_core parport shpchp lpc_ich mfd_core video acpi_cpufreq nfsd auth_rpcgss oid_registry exportfs nfs_acl lockd grace sunrpc uinput autofs4 ext4 mbcache jbd2 sd_mod e1000e ptp pps_core ahci r8169 mii libahci dm_mirror dm_region_hash dm_log dm_mod ipv6
> CPU: 1 PID: 15030 Comm: mdadm Tainted: G      D W       4.1.0-rc6+ #2
> Hardware name: Intel Corporation S1200BTL/S1200BTL, BIOS S1200BT.86B.02.00.0035.030220120927 03/02/2012
> task: ffff880233550110 ti: ffff8800a6cbc000 task.ti: ffff8800a6cbc000
> RIP: 0010:[<ffffffff81073c1f>]  [<ffffffff81073c1f>] exit_creds+0x1f/0x70
> RSP: 0018:ffff8800a6cbfca8  EFLAGS: 00010292
> RAX: 0000000000000000 RBX: ffff88022b2642d0 RCX: ffff8800a6cbfd00
> RDX: 0000000000005110 RSI: 0000000000000296 RDI: 0000000000000000
> RBP: ffff8800a6cbfcb8 R08: 0000000000000000 R09: 0000000000000000
> R10: 000000000000000b R11: 0000000000000246 R12: ffff88022b2642d0
> R13: 000000000000ff00 R14: 0000000000000004 R15: 0000000000000004
> FS:  00007f70ff26f740(0000) GS:ffff88023ee20000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000000 CR3: 00000000a66cf000 CR4: 00000000001406e0
> Stack:
>  ffff8800a6cbfcb8 ffff88022b2642d0 ffff8800a6cbfcd8 ffffffff8105264a
>  0000000000000000 ffff88022b2642d0 ffff8800a6cbfd08 ffffffff81072048
>  ffff880000000001 ffff880233cb9140 ffff880234577150 ffffffffa0477320
> Call Trace:
>  [<ffffffff8105264a>] __put_task_struct+0x4a/0x130
>  [<ffffffff81072048>] kthread_stop+0x88/0x100
>  [<ffffffff81487cf5>] md_unregister_thread+0x45/0x80
>  [<ffffffff8148e73d>] md_reap_sync_thread+0x1d/0x1a0
>  [<ffffffff8148ea68>] action_store+0x1a8/0x2b0
>  [<ffffffff8105cd4d>] ? ns_capable+0x2d/0x60
>  [<ffffffff8148bf8b>] md_attr_store+0x7b/0xd0
>  [<ffffffff8120f77d>] sysfs_kf_write+0x3d/0x50
>  [<ffffffff8120eeda>] kernfs_fop_write+0x12a/0x180
>  [<ffffffff81199ba8>] __vfs_write+0x28/0xf0
>  [<ffffffff8119c7a9>] ? __sb_start_write+0x49/0xf0
>  [<ffffffff81230b93>] ? security_file_permission+0x23/0xa0
>  [<ffffffff8119a299>] vfs_write+0xa9/0x1b0
>  [<ffffffff8119b066>] SyS_write+0x46/0xb0
>  [<ffffffff810edb94>] ? __audit_syscall_entry+0xb4/0x110
>  [<ffffffff815b6f97>] system_call_fastpath+0x12/0x6a
> Code: 0f 84 37 fe ff ff e9 10 fe ff ff 90 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 83 ec 08 48 8b 87 c8 09 00 00 48 8b bf c0 09 00 00 <8b> 00 48 c7 83 c0 09 00 00 00 00 00 00 f0 ff 0f 74 1f 48 8b bb 
> RIP  [<ffffffff81073c1f>] exit_creds+0x1f/0x70
>  RSP <ffff8800a6cbfca8>
> CR2: 0000000000000000
> ---[ end trace 1d72a07e246912eb ]---
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