Hi Timmothy, thanks for the tip! ;-)

I think I found it:

=> https://forum.ipfire.org/viewtopic.php?f=17&t=17195&p=100915#p100914

Bug reported:
https://bugzilla.ipfire.org/show_bug.cgi?id=11192

Best,
Matthias

On 23.09.2016 21:31, IT Superhack wrote:
> Hello Matthias,
> 
> there are some complaints about kernel errors in this forum branch:
> http://forum.ipfire.org/viewtopic.php?f=17&t=17195&p=100655
> 
> Some of them look quite similar to those you encountered.
> 
> Personally, I cannot confirm this on my IPFire machine (ARM board
> with 32GB SD card), but maybe the error only occurs if a "real" HDD
> is in use.
> 
> Best regards,
> Timmothy Wilson
> 
> Matthias Fischer:
>> Hi list,
>> 
>> I'm experiencing an interesting problem here:
>> 
>> *Exactly* after rebooting after upgrading to Core 104, which worked
>> without any problems, I find that I got a lot of kernel errors:
>> 
>> ...
>> 21:50:22	kernel: 	REJECT_FORWARD IN=green0 OUT=red0 MAC=00:02:b3:1a:b0:96:00:07:e9:40:b8:29:08:00 SRC=192.168.100.1 DST=192.168.100.254 LEN=52 TOS=0x00 PREC=0x00 TTL=127 ID=17075 DF PROTO=TCP SPT=50633 DPT=444 WINDOW=8192 RES=0x00 SYN URGP=0
>> 21:50:32	kernel: 	Kernel logging (proc) stopped.
>> 21:50:32	kernel: 	Kernel log daemon terminating.
>> 21:52:40	kernel: 	IPv6: ADDRCONF(NETDEV_UP): green0: link is not ready
>> 21:52:40	kernel: 	e100 0000:00:03.0 green0: NIC Link is Up 100 Mbps Full Duplex
>> 21:52:41	kernel: 	IPv6: ADDRCONF(NETDEV_CHANGE): green0: link becomes ready
>> 21:52:41	kernel: 	IPv6: ADDRCONF(NETDEV_UP): red0: link is not ready
>> 21:52:41	kernel: 	e100 0000:00:06.0 red0: NIC Link is Up 100 Mbps Full Duplex
>> 21:52:41	kernel: 	IPv6: ADDRCONF(NETDEV_CHANGE): red0: link becomes ready
>> 21:54:01	kernel: 	perf samples too long (2501 > 2500), lowering kernel.perf_event_max_sample_rate to 50100
>> 21:55:01	kernel: 	sd 1:0:0:0: [sda] Unhandled error code
>> 21:55:01	kernel: 	sd 1:0:0:0: [sda]
>> 21:55:01	kernel: 	Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
>> 21:55:01	kernel: 	sd 1:0:0:0: [sda] CDB:
>> 21:55:01	kernel: 	ATA command pass through(16): 85 06 20 00 00 00 00 00 00 00 00 00 00 40 e5 00
>> 21:55:01	kernel: 	sd 1:0:0:0: [sda] Unhandled error code
>> 21:55:01	kernel: 	sd 1:0:0:0: [sda]
>> 21:55:01	kernel: 	Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
>> 21:55:01	kernel: 	sd 1:0:0:0: [sda] CDB:
>> 21:55:01	kernel: 	ATA command pass through(16): 85 06 20 00 00 00 00 00 00 00 00 00 00 40 98 00
>> ...
>> 
>> Profile:
>> http://fireinfo.ipfire.org/profile/63d7b5d45f8a7816ca68810ed0061d7ff95a9958
>> 
>> Nothing was changed, I tested the drive including cables => no problems:
>> 
>> ***SNIP***
>> root(a)ipfire: / # smartctl -a /dev/sda
>> smartctl 6.5 2016-05-07 r4318 [i686-linux-3.14.79-ipfire-pae] (IPFire 2.19)
>> Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
>> 
>> === START OF INFORMATION SECTION ===
>> Vendor:               IBM
>> Product:              DDYS-T36950M
>> Revision:             S96H
>> User Capacity:        36,703,918,080 bytes [36.7 GB]
>> Logical block size:   512 bytes
>> Rotation Rate:        10000 rpm
>> Logical Unit id:      0x5005076707c1df6e
>> Serial number:        4FY3P734
>> Device type:          disk
>> Transport protocol:   Fibre channel (FCP-2)
>> Local Time is:        Fri Sep 23 18:46:45 2016 CEST
>> SMART support is:     Available - device has SMART capability.
>> SMART support is:     Enabled
>> Temperature Warning:  Enabled
>> 
>> === START OF READ SMART DATA SECTION ===
>> SMART Health Status: OK
>> 
>> Current Drive Temperature:     42 C
>> Drive Trip Temperature:        85 C
>> 
>> Manufactured in week 46 of year 2001
>> Specified cycle count over device lifetime:  10000
>> Accumulated start-stop cycles:  139
>> Elements in grown defect list: 2
>> 
>> Error counter log:
>>            Errors Corrected by           Total   Correction     Gigabytes    Total
>>                ECC          rereads/    errors   algorithm      processed    uncorrected
>>            fast | delayed   rewrites  corrected  invocations   [10^9 bytes]  errors
>> read:          0        0         0         3          3       2490.529           0
>> write:         0        2         0        16         16       1534.193           0
>> verify:        0        0         0         0          0         73.408           0
>> 
>> Non-medium error count:        0
>> ***SNAP***
>> 
>> What puzzles me is the fact that these errors first *occur right after rebooting with Core104*,
>> but *never* before, all hardware is running and seems to be ok. No Panic, no crash, nothing,
>> just these kernel errors since upgrading.
>> 
>> Does anyone have an idea?
>> 
>> Best,
>> Matthias
>> 
> 
>