Hello,
It appears that a check_unmap kernel failure for the CISS driver was
introduced with kernel-4.9.0-0.rc2.git1.1.fc26. When booting this
kernel, or any newer kernel, I see the following:
[ 3.676658] HP CISS Driver (v 3.6.26)
0m] Reached target System Initialization.
Starting dracut initqueue hook...
Starting Show Plymouth Boot Screen...
[ 3.756592] scsi host0: pata_amd
[ 3.772866] scsi host1: pata_amd
[ 3.782052] ata1: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0x2000 irq 14
[ 3.789616] ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0x2008 irq 15
[ 3.825789] cciss 0000:02:04.0: cciss0: <0x46> at PCI 0000:02:04.0 IRQ 24
using DAC
[ 3.836530] audit: type=1130 audit(1478270493.962:10): pid=1 uid=0 auid=4294967295
ses=4294967295 subj=kernel msg='unit=plymouth-start comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[
OK
] Started Show[ 3.839544] ------------[ cut here ]------------
Plymouth Boot S[ 3.839555] WARNING: CPU: 0 PID: 193 at lib/dma-debug.c:1164
check_unmap+0x4af/0x940
creen.
[ 3.839559] cciss 0000:02:04.0: DMA-API: device driver failed to check map
error[device address=0x0000000038f521c0] [size=36 bytes] [mapped as single]
[ 3.839563] Modules linked in: serio_raw cciss(+) pata_amd
[ 3.839566] CPU: 0 PID: 193 Comm: kworker/0:2 Not tainted
4.9.0-0.rc2.git1.1.fc26.x86_64 #1
[ 3.839567] Hardware name: HP ProLiant DL385 G1, BIOS A05 03/01/2006
[ 3.839573] Workqueue: events work_for_cpu_fn
[ 3.839577] ffff9e9ec05938f8 ffffffff8546cd23 ffff9e9ec0593948
0000000000000000
[ 3.839579] ffff9e9ec0593938 ffffffff850af4cb 0000048c00000082
ffff8aa07ca0ea60
[ 3.839582] ffffffff87483a00 ffff8aa07b878180 0000000000000282
ffffffff85c5ad66
[ 3.839582] Call Trace:
[ 3.839588] [<ffffffff8546cd23>] dump_stack+0x86/0xc3
[ 3.839591] [<ffffffff850af4cb>] __warn+0xcb/0xf0
[ 3.839593] [<ffffffff850af54f>] warn_slowpath_fmt+0x5f/0x80
[ 3.839595] [<ffffffff854a26ff>] check_unmap+0x4af/0x940
[ 3.839597] [<ffffffff854a2c09>] debug_dma_unmap_page+0x79/0xa0
[ 3.839613] [<ffffffffc032d427>] sendcmd_withirq_core+0x217/0x260 [cciss]
[ 3.839618] [<ffffffff85906820>] ? wait_for_completion+0x110/0x140
[ 3.839623] [<ffffffffc03301a8>] sendcmd_withirq+0x98/0xb0 [cciss]
[ 3.839628] [<ffffffffc033348f>] cciss_init_one+0x1a8f/0x1f70 [cciss]
[ 3.839632] [<ffffffff854ca4f5>] local_pci_probe+0x45/0xa0
[ 3.839634] [<ffffffff850cbd74>] work_for_cpu_fn+0x14/0x20
[ 3.839637] [<ffffffff850d020e>] process_one_work+0x23e/0x6f0
[ 3.839638] [<ffffffff850d018a>] ? process_one_work+0x1ba/0x6f0
[ 3.839641] [<ffffffff850d0893>] worker_thread+0x1d3/0x490
[ 3.839642] [<ffffffff850d06c0>] ? process_one_work+0x6f0/0x6f0
[ 3.839644] [<ffffffff850d06c0>] ? process_one_work+0x6f0/0x6f0
[ 3.839648] [<ffffffff850d7b52>] kthread+0x102/0x120
[ 3.839652] [<ffffffff85111175>] ? trace_hardirqs_on_caller+0xf5/0x1b0
[ 3.839655] [<ffffffff850d7a50>] ? kthread_park+0x60/0x60
[ 3.839658] [<ffffffff8590cbfa>] ret_from_fork+0x2a/0x40
[ 3.839659] ---[ end trace 1ec289ff52b16fd7 ]---
[ 3.839660] Mapped at:
[ 3.839663]
[ 3.839663] [<ffffffff854a131c>] debug_dma_map_page+0x8c/0x160
[ 3.839668]
[ 3.839668] [<ffffffffc032e75f>] fill_cmd+0x1bf/0x420 [cciss]
[ 3.839672]
[ 3.839672] [<ffffffffc0330174>] sendcmd_withirq+0x64/0xb0 [cciss]
[ 3.839676]
[ 3.839676] [<ffffffffc033348f>] cciss_init_one+0x1a8f/0x1f70 [cciss]
[ 3.839679]
[ 3.839679] [<ffffffff854ca4f5>] local_pci_probe+0x45/0xa0
[ 3.859535] scsi host2: cciss
This problem does not appear when booting with
kernel-4.9.0-0.rc2.git0.1.fc26. It reproduces 100% of the time, simply
try to boot kernel-4.9.0-0.rc2.git1.1.fc26 on a host with a CISS disk.
Thank you,
Johnny
