linux-kernel - [bisected] 3c8ba0d61d04ced9f8d9ff93977995a9e4e96e91 oopses on s390

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Date:   Fri, 6 Apr 2018 11:47:30 +0200 (CEST)
From:   Sebastian Ott <sebott@...ux.vnet.ibm.com>
To:     Kees Cook <keescook@...omium.org>
cc:     linux-kernel@...r.kernel.org,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Martin Uecker <Martin.Uecker@....uni-goettingen.de>,
        Ingo Molnar <mingo@...nel.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Subject: [bisected] 3c8ba0d61d04ced9f8d9ff93977995a9e4e96e91 oopses on s390

Hi,

Today's kernel oopsed on s390. Bisect points to:
3c8ba0d61d04 ("kernel.h: Retain constant expression output for max()/min()")

[    1.898277] dasd-eckd 0.0.3304: DASD with 4 KB/block, 21636720 KB total size, 48 KB/track, compatible disk layout
[    1.898308] ------------[ cut here ]------------
[    1.898310] kernel BUG at block/bio.c:1798!
[    1.898320] illegal operation: 0001 ilc:1 [#1] PREEMPT SMP 
[    1.898322] Modules linked in:
[    1.898325] CPU: 2 PID: 68 Comm: kworker/2:1 Not tainted 4.16.0-09576-g38c23685b273 #130
[    1.898326] Hardware name: IBM 3906 M04 704 (LPAR)
[    1.898332] Workqueue: events do_kick_device
[    1.898334] Krnl PSW : 0000000008df7044 00000000dbc29dcd (bio_split+0xb2/0xb8)
[    1.898338]            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
[    1.898340] Krnl GPRS: 000003d100000008 000003d100000000 00000000facfa100 0000000000000000
[    1.898341]            0000000001400000 00000000fae0b100 00000000fa9c7738 00000000facfa100
[    1.898342]            00000000facfa188 0000000000000000 0000000000000000 0000000000000000
[    1.898343]            00000000f7bb0000 000003d100000000 0000000000521530 00000000fa9c75e8
[    1.898351] Krnl Code: 000000000050e41a: f0c00004ebaf        srp     4(13,%r0),2991(%r14),0
                          000000000050e420: f0a0000407f4        srp     4(11,%r0),2036,0
                         #000000000050e426: a7f40001            brc     15,50e428
                         >000000000050e42a: a7f40001            brc     15,50e42c
                          000000000050e42e: 0707                bcr     0,%r7
                          000000000050e430: c00400000000        brcl    0,50e430
                          000000000050e436: eb6ff0480024        stmg    %r6,%r15,72(%r15)
                          000000000050e43c: a7f13f80            tmll    %r15,16256
[    1.898365] Call Trace:
[    1.898367] ([<0000000001088020>] 0x1088020)
[    1.898371]  [<0000000000528de6>] blk_mq_make_request+0x76/0x768 
[    1.898375]  [<000000000051923a>] generic_make_request+0xea/0x2c0 
[    1.898376]  [<00000000005194b4>] submit_bio+0xa4/0x1a0 
[    1.898378]  [<00000000003ab934>] submit_bh_wbc+0x1c4/0x218 
[    1.898380]  [<00000000003ac5d2>] block_read_full_page+0x352/0x3f8 
[    1.898383]  [<00000000002ad1ae>] do_read_cache_page+0x19e/0x3c0 
[    1.898385]  [<00000000002ad400>] read_cache_page+0x30/0x40 
[    1.898387]  [<0000000000533900>] read_dev_sector+0x58/0xe8 
[    1.898389]  [<0000000000538252>] read_lba.isra.0+0x12a/0x1b8 
[    1.898391] dasd-eckd 0.0.3307: DASD with 4 KB/block, 21636720 KB total size, 48 KB/track, compatible disk layout
[    1.898394]  [<0000000000538748>] efi_partition+0x198/0x660 
[    1.898396]  [<0000000000535c8c>] check_partition+0x15c/0x2b8 
[    1.898398]  [<0000000000534092>] rescan_partitions+0xea/0x3f8 
[    1.898400]  [<000000000052ee10>] blkdev_reread_part+0x40/0x60 
[    1.898403]  [<0000000000674a10>] dasd_scan_partitions+0x90/0x148 
[    1.898405]  [<000000000066eaa2>] dasd_change_state+0x912/0xba0 
[    1.898407]  [<000000000066ed78>] do_kick_device+0x48/0x98 
[    1.898410]  [<00000000001644b2>] process_one_work+0x1d2/0x458 
[    1.898410] ------------[ cut here ]------------
[    1.898411] kernel BUG at block/bio.c:1798!
[    1.898420]  [<0000000000164794>] worker_thread+0x5c/0x478 
[    1.898422]  [<000000000016b700>] kthread+0x148/0x160 
[    1.898425]  [<000000000083e54a>] kernel_thread_starter+0x6/0xc 
[    1.898427]  [<000000000083e544>] kernel_thread_starter+0x0/0xc 
[    1.898428] Last Breaking-Event-Address:
[    1.898429]  [<000000000050e426>] bio_split+0xae/0xb8
[    1.898431]  
[    1.898432] illegal operation: 0001 ilc:1 [#2] 
[    1.898432] Kernel panic - not syncing: Fatal exception: panic_on_oops



Bisect log and config attached. I'll look at min/max users in the affected
areas later today.

Sebastian
View attachment "config" of type "text/plain" (59538 bytes)

View attachment "bisect.log" of type "text/plain" (2424 bytes)