syzbot


upstream boot error: BUG: unable to handle kernel paging request in __init_work

Status: internal: reported on 2022/08/14 20:25
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 9993a4f989c7 virtio: Revert "virtio: find_vqs() add arg sizes"
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 168d, last: 168d

Sample crash report:
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

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce-selinux-root 2022/08/14 20:24 upstream 5d6a0f4da927 8dfcaa3d .config console log report upstream boot error: BUG: unable to handle kernel paging request in __init_work
* Struck through repros no longer work on HEAD.