On Mon, Apr 09, 2018 at 06:18:04PM +0800, Li Wang wrote:
> Hi,
>
> I got this BUG_ON() on s390x platform with kernel-v4.16.0.
>
> [ 1.200196] ------------[ cut here ]------------
> [ 1.200201] kernel BUG at block/bio.c:1798!
> [ 1.200228] illegal operation: 0001 ilc:1 [#1] SMP
> [ 1.200230] Modules linked in: dasd_eckd_mod(+) dasd_mod qeth(+)
> qdio lcs ctcm ccwgroup fsm dm_mirror dm_region_hash dm_log dm_mod
> [ 1.200236] CPU: 1 PID: 16 Comm: kworker/1:0 Not tainted 4.16.0 #1
> [ 1.200237] Hardware name: IBM 2827 H43 400 (z/VM 6.4.0)
> [ 1.200243] Workqueue: events do_kick_device [dasd_mod]
> [ 1.200245] Krnl PSW : 000000008cb7d53b 000000007073145d
> (bio_split+0xcc/0xd0)
> [ 1.200250] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3
> CC:2 PM:0 RI: 0 EA:3
> [ 1.200252] Krnl GPRS: 0000000000000000 0000000000000000
> 0000000001cc4400 000 0000000000000
> [ 1.200253] 0000000001400000 000000007ccdb400
> 0000000000000000 000 0000000000008
> [ 1.200254] 0000000001cc4400 000003d101df1640
> 0000000000001000 000 0000001cc4400
> [ 1.200255] 0000000000000000 000000000077f088
> 000000007ccbb590 000 000007ccbb560
> [ 1.200262] Krnl Code: 00000000004311e8: a7f4ffec brc
> 15,4311c 0
> [ 1.200262] 00000000004311ec: a7f40001 brc
> 15,4311e e
> [ 1.200262] #00000000004311f0: a7f40001 brc
> 15,4311f 2
> [ 1.200262] >00000000004311f4: 0707 bcr
> 0,%r7
> [ 1.200262] 00000000004311f6: 0707 bcr
> 0,%r7
> [ 1.200262] 00000000004311f8: c00400000000 brcl
> 0,4311f8
> [ 1.200262] 00000000004311fe: eb6ff0480024 stmg
> %r6,%r15 ,72(%r15)
> [ 1.200262] 0000000000431204: a7f13f80 tmll
> %r15,162 56
> [ 1.200275] Call Trace:
> [ 1.200278] ([<0000000001088020>] 0x1088020)
> [ 1.200281] [<0000000000443d54>] blk_queue_split+0x4a4/0x608
> [ 1.200283] [<000000000044ab6c>] blk_mq_make_request+0x7c/0x640
> [ 1.200286] [<000000000043b148>] generic_make_request+0x108/0x2b0
> [ 1.200288] [<000000000043b384>] submit_bio+0x94/0x158
> [ 1.200290] [<000000000034eede>] submit_bh_wbc+0x1b6/0x200
> [ 1.200292] [<000000000034fcc4>] block_read_full_page+0x3d4/0x3f0
> [ 1.200294] [<000000000026bdde>] do_read_cache_page+0x1ae/0x380
> [ 1.200296] [<000000000026bfe0>] read_cache_page+0x30/0x40
> [ 1.200298] [<0000000000455490>] read_dev_sector+0x58/0xe8
> [ 1.200300] [<0000000000459f4e>] read_lba+0xfe/0x1b0
> [ 1.200301] [<000000000045a5be>] find_valid_gpt+0xe6/0x618
> [ 1.200303] [<000000000045add8>] efi_partition+0x2e8/0x358
> [ 1.200304] [<0000000000457720>] check_partition+0x158/0x288
> [ 1.200306] [<0000000000455bd8>] rescan_partitions+0xd8/0x3e0
> [ 1.200307] [<0000000000450870>] blkdev_reread_part+0x40/0x60
> [ 1.200312] [<000003ff80165384>] dasd_scan_partitions+0x64/0x140
> [dasd_mod]
> [ 1.200317] [<000003ff8015fb86>] dasd_change_state+0xb6e/0xc18
> [dasd_mod]
> [ 1.200322] [<000003ff8015fc78>] do_kick_device+0x48/0x98
> [dasd_mod]
> [ 1.200325] [<000000000015f50e>] process_one_work+0x19e/0x420
> [ 1.200327] [<000000000015f7e2>] worker_thread+0x52/0x458
> [ 1.200328] [<0000000000165bb4>] kthread+0x134/0x168
> [ 1.200333] [<0000000000716722>] kernel_thread_starter+0x6/0xc
> [ 1.200335] [<000000000071671c>] kernel_thread_starter+0x0/0xc
> [ 1.200335] Last Breaking-Event-Address:
> [ 1.200337] [<00000000004311f0>] bio_split+0xc8/0xd0
> [ 1.200337]
> [ 1.200338] Kernel panic - not syncing: Fatal exception:
> panic_on_oops
Turns out one fundamental issue, please test:
e9092d0d9796 ("Fix subtle macro variable shadowing in min_not_zero()")
and see discussion in the thread:
https://marc.info/?t=152328917200004&r=1&w=2
--
Ming
