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Sender: Guenter Roeck <groeck7@gmail.com>
Date:   Sun, 14 Aug 2022 14:26:10 -0700
From:   Guenter Roeck <linux@roeck-us.net>
To:     linux-kernel@vger.kernel.org
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Greg KH <gregkh@linuxfoundation.org>
Subject: upstream kernel crashes
Message-ID: <20220814212610.GA3690074@roeck-us.net>
MIME-Version: 1.0
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Hi all,

syscaller reports lots of crashes with the mainline kernel. The latest
I have seen, based on the current ToT, is attached. Backtraces are not
always the same, but this one is typical.

I have not tried to analyze this further.

Guenter

---
scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
BUG: unable to handle page fault for address: ffffdc0000000001
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 11826067
P4D 11826067
PUD 0

Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 41 Comm: kworker/u4:2 Not tainted 5.19.0-syzkaller-14374-g5d6a0f4da927 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound async_run_entry_fn
RIP: 0010:__hlist_del include/linux/list.h:886 [inline]
RIP: 0010:hlist_del include/linux/list.h:898 [inline]
RIP: 0010:__alloc_object lib/debugobjects.c:213 [inline]
RIP: 0010:alloc_object lib/debugobjects.c:253 [inline]
RIP: 0010:__debug_object_init+0x761/0xd10 lib/debugobjects.c:570
Code: 00 00 4d 8b 47 08 4c 89 c7 48 c1 ef 03 80 3c 0f 00 0f 85 74 04 00 00 48 85 f6 49 89 30 74 1a 48 8d 7e 08 49 89 fa 49 c1 ea 03 <41> 80 3c 0a 00 0f 85 2f 04 00 00 4c 89 46 08 48 b8 00 01 00 00 00
RSP: 0000:ffffc90000d2f670 EFLAGS: 00010802

RAX: 0000000000000000 RBX: 0000000000001c37 RCX: dffffc0000000000
RDX: ffff8880b9b36c20 RSI: ffff000000000000 RDI: ffff000000000008
RBP: 0000000000001c3b R08: ffffffff91340700 R09: 0000000000001c2b
R10: 1fffe00000000001 R11: 0000000000000215 R12: ffff8880b9b36c20
R13: 0000000000000209 R14: ffffed1017366d85 R15: ffff8881472293f0
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffdc0000000001 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__init_work+0x48/0x50 kernel/workqueue.c:523
pm_runtime_init+0x1fe/0x400 drivers/base/power/runtime.c:1717
device_pm_init drivers/base/power/power.h:168 [inline]
device_initialize+0x23f/0x540 drivers/base/core.c:2985
scsi_sysfs_device_initialize+0x257/0xa60 drivers/scsi/scsi_sysfs.c:1627
scsi_alloc_sdev+0x9b4/0xcc0 drivers/scsi/scsi_scan.c:364
scsi_probe_and_add_lun+0x22be/0x3660 drivers/scsi/scsi_scan.c:1191
__scsi_scan_target+0x21f/0xdb0 drivers/scsi/scsi_scan.c:1673
scsi_scan_channel drivers/scsi/scsi_scan.c:1761 [inline]
scsi_scan_channel+0x148/0x1e0 drivers/scsi/scsi_scan.c:1737
scsi_scan_host_selected+0x2df/0x3b0 drivers/scsi/scsi_scan.c:1790
do_scsi_scan_host+0x1e8/0x260 drivers/scsi/scsi_scan.c:1929
do_scan_async+0x3e/0x500 drivers/scsi/scsi_scan.c:1939
async_run_entry_fn+0x98/0x530 kernel/async.c:127
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Modules linked in:
CR2: ffffdc0000000001
---[ end trace 0000000000000000 ]---
RIP: 0010:__hlist_del include/linux/list.h:886 [inline]
RIP: 0010:hlist_del include/linux/list.h:898 [inline]
RIP: 0010:__alloc_object lib/debugobjects.c:213 [inline]
RIP: 0010:alloc_object lib/debugobjects.c:253 [inline]
RIP: 0010:__debug_object_init+0x761/0xd10 lib/debugobjects.c:570
Code: 00 00 4d 8b 47 08 4c 89 c7 48 c1 ef 03 80 3c 0f 00 0f 85 74 04 00 00 48 85 f6 49 89 30 74 1a 48 8d 7e 08 49 89 fa 49 c1 ea 03 <41> 80 3c 0a 00 0f 85 2f 04 00 00 4c 89 46 08 48 b8 00 01 00 00 00
RSP: 0000:ffffc90000d2f670 EFLAGS: 00010802
RAX: 0000000000000000 RBX: 0000000000001c37 RCX: dffffc0000000000
RDX: ffff8880b9b36c20 RSI: ffff000000000000 RDI: ffff000000000008
RBP: 0000000000001c3b R08: ffffffff91340700 R09: 0000000000001c2b
R10: 1fffe00000000001 R11: 0000000000000215 R12: ffff8880b9b36c20
R13: 0000000000000209 R14: ffffed1017366d85 R15: ffff8881472293f0
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffdc0000000001 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 4d 8b 47 08 mov 0x8(%r15),%r8
6: 4c 89 c7 mov %r8,%rdi
9: 48 c1 ef 03 shr $0x3,%rdi
d: 80 3c 0f 00 cmpb $0x0,(%rdi,%rcx,1)
11: 0f 85 74 04 00 00 jne 0x48b
17: 48 85 f6 test %rsi,%rsi
1a: 49 89 30 mov %rsi,(%r8)
1d: 74 1a je 0x39
1f: 48 8d 7e 08 lea 0x8(%rsi),%rdi
23: 49 89 fa mov %rdi,%r10
26: 49 c1 ea 03 shr $0x3,%r10
* 2a: 41 80 3c 0a 00 cmpb $0x0,(%r10,%rcx,1) <-- trapping instruction
2f: 0f 85 2f 04 00 00 jne 0x464
35: 4c 89 46 08 mov %r8,0x8(%rsi)
39: 48 rex.W
3a: b8 00 01 00 00 mov $0x100,%eax