kernel 4.8-rc5 kernel BUG at block/blk-core.c:2032!

[Stefan Priebe - Profihost AG]

Hi,

while trying Kernel 4.8-rc5 my raid5 breaks every few minutes.

Trace:
------------[ cut here ]------------
kernel BUG at block/blk-core.c:2032!
invalid opcode: 0000 [#1] SMP
Modules linked in: netconsole ipt_REJECT nf_reject_ipv4 xt_multiport
iptable_filter ip_tables x_tables 8021q garp bonding sb_edac edac_core
x86_pkg_temp_thermal coretemp kvm_intel kvm i2c_i801 irqbypass i2c_smbus
ipmi_si crc32_pclmul i2c_core ghash_clmulni_intel shpchp ipmi_msghandler
button loop fuse btrfs dm_mod raid10 raid0 multipath linear raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq
raid1 md_mod sg sd_mod ixgbe i40e mdio usbhid ehci_pci ehci_hcd ahci
usbcore ptp libahci usb_common megaraid_sas pps_core
CPU: 8 PID: 1105 Comm: md0_raid5 Not tainted 4.8.0-rc5-00003-g3abda5c #2
Hardware name: Supermicro X10DRH/X10DRH-iT, BIOS 1.0c 02/18/2015
task: ffff97de5e1e0000 task.stack: ffff97de597a0000
RIP: 0010:[<ffffffffbc3b3890>] [<ffffffffbc3b3890>]
generic_make_request+0x1c0/0x1d0
RSP: 0018:ffff97de597a3aa0 EFLAGS: 00010286
RAX: ffff97de5e1e0000 RBX: ffff97dd227e5030 RCX: 0000000000000000
RDX: ffffffffc0000001 RSI: 0000000000000001 RDI: ffff97de5e7d9db8
RBP: ffff97de597a3ad8 R08: 0000000000000008 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
R13: ffff97de5aa20c00 R14: 00000000000002f0 R15: ffff97e65dce0e00
FS: 0000000000000000(0000) GS:ffff97e67f200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0e4e1ec000 CR3: 0000000078c06000 CR4: 00000000001406e0Stack:
ffff97de597a3b50 0000000000001000 0000000000000000 ffff97dd227e4c80
ffff97de5aa20c00 00000000000002f0 ffff97e65dce0e00 ffff97de597a3ba0
ffffffffc02595db ffffffffc025e04b 00000001597a3b01 0000000200000006
Call Trace:
[<ffffffffc02595db>] ops_run_io+0x3bb/0x990 [raid456]
[<ffffffffc025e04b>] ? raid_run_ops+0xefb/0x1520 [raid456]
[<ffffffffc0261d16>] handle_stripe+0x9a6/0x2280 [raid456]
[<ffffffffbc0ae6b2>] ? default_wake_function+0x12/0x20
[<ffffffffbc0c7d22>] ? autoremove_wake_function+0x12/0x40
[<ffffffffc0263783>] handle_active_stripes.isra.54+0x193/0x4b0 [raid456]
[<ffffffffc02571d5>] ? __release_stripe+0x15/0x20 [raid456]
[<ffffffffc0263f49>] raid5d+0x4a9/0x740 [raid456]
[<ffffffffbc0e88f0>] ? init_timer_key+0xa0/0xa0
[<ffffffffc019a7eb>] md_thread+0x12b/0x130 [md_mod]
[<ffffffffbc0c7d10>] ? wait_woken+0x90/0x90
[<ffffffffc019a6c0>] ? find_pers+0x70/0x70 [md_mod]
[<ffffffffbc0a395b>] kthread+0xdb/0x100
[<ffffffffbc6de57f>] ret_from_fork+0x1f/0x40
[<ffffffffbc0a3880>] ? kthread_park+0x60/0x60
Code: bd 70 08 00 00 f0 49 83 ad 70 08 00 00 01 74 05 e9 5a ff ff ff 41
ff 95 80 08 00 00 e9 4e ff ff ff 48 c7 40 08 00 00 00 00 eb 8c <0f> 0b
66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
RIP [<ffffffffbc3b3890>] generic_make_request+0x1c0/0x1d0
RSP <ffff97de597a3aa0>
---[ end trace 457dbe5e9cdd3473 ]---

Stefan