block nbd0: shutting down sockets
INFO: task syz-executor114:8099 blocked for more than 140 seconds.
Not tainted 4.19.206-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor114 D27064 8099 8088 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
io_schedule+0xb5/0x120 kernel/sched/core.c:5181
wait_on_page_bit_common mm/filemap.c:1123 [inline]
wait_on_page_bit+0x2c5/0x3f0 mm/filemap.c:1156
wait_on_page_locked include/linux/pagemap.h:531 [inline]
do_read_cache_page+0x20a/0x1170 mm/filemap.c:2873
read_mapping_page include/linux/pagemap.h:402 [inline]
read_dev_sector+0xbf/0x500 block/partition-generic.c:671
read_part_sector block/partitions/check.h:38 [inline]
adfspart_check_ICS+0x114/0xe70 block/partitions/acorn.c:366
check_partition+0x390/0x690 block/partitions/check.c:167
rescan_partitions+0x1b5/0x970 block/partition-generic.c:535
bdev_disk_changed+0x179/0x1b0 fs/block_dev.c:1435
__blkdev_get+0x1282/0x1480 fs/block_dev.c:1561
blkdev_get+0xb0/0x940 fs/block_dev.c:1627
blkdev_open+0x202/0x290 fs/block_dev.c:1788
do_dentry_open+0x4aa/0x1160 fs/open.c:796
do_last fs/namei.c:3421 [inline]
path_openat+0x793/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x406db4
Code: Bad RIP value.
RSP: 002b:00007f6a216b6d50 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000406db4
RDX: 0000000000000000 RSI: 00007f6a216b6de0 RDI: 00000000ffffff9c
RBP: 00007f6a216b6de0 R08: 0000000000000000 R09: 002364626e2f7665
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffe65818f1f R14: 00007f6a216b7300 R15: 0000000000022000
INFO: task syz-executor114:8100 blocked for more than 140 seconds.
Not tainted 4.19.206-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor114 D28976 8100 8088 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
__mutex_lock_common kernel/locking/mutex.c:1015 [inline]
__mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
__blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478
blkdev_get+0xb0/0x940 fs/block_dev.c:1627
blkdev_open+0x202/0x290 fs/block_dev.c:1788
do_dentry_open+0x4aa/0x1160 fs/open.c:796
do_last fs/namei.c:3421 [inline]
path_openat+0x793/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x406db4
Code: Bad RIP value.
RSP: 002b:00007f6a21695d50 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000406db4
RDX: 0000000000000000 RSI: 00007f6a21695de0 RDI: 00000000ffffff9c
RBP: 00007f6a21695de0 R08: 0000000000000000 R09: 002364626e2f7665
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffe65818f1f R14: 00007f6a21696300 R15: 0000000000022000
INFO: task syz-executor114:8101 blocked for more than 140 seconds.
Not tainted 4.19.206-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor114 D28600 8101 8088 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
__mutex_lock_common kernel/locking/mutex.c:1015 [inline]
__mutex_lock+0x604/0x1200 kernel/locking/mutex.c:1083
__blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478
blkdev_get+0xb0/0x940 fs/block_dev.c:1627
blkdev_open+0x202/0x290 fs/block_dev.c:1788
do_dentry_open+0x4aa/0x1160 fs/open.c:796
do_last fs/namei.c:3421 [inline]
path_openat+0x793/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x406db4
Code: Bad RIP value.
RSP: 002b:00007f6a21674d50 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000406db4
RDX: 0000000000000000 RSI: 00007f6a21674de0 RDI: 00000000ffffff9c
RBP: 00007f6a21674de0 R08: 0000000000000000 R09: 002364626e2f7665
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffe65818f1f R14: 00007f6a21675300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1571:
#0: 00000000a92526b4 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7807:
#0: 000000004aa9779e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
1 lock held by syz-executor114/8099:
#0: 000000009cf650ee (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478
1 lock held by syz-executor114/8100:
#0: 000000009cf650ee (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478
1 lock held by syz-executor114/8101:
#0: 000000009cf650ee (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.206-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4694 Comm: systemd-journal Not tainted 4.19.206-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__orc_find+0x6/0xf0 arch/x86/kernel/unwind_orc.c:31
Code: 6e 00 e9 a7 fd ff ff e8 08 de 6e 00 e9 ea fc ff ff 48 8b 3c 24 e8 8a de 6e 00 e9 7b fe ff ff 90 90 90 90 90 41 57 89 d0 41 56 <41> 55 41 54 4c 8d 64 87 fc 55 53 48 83 ec 10 85 d2 0f 84 95 00 00
RSP: 0018:ffff8880a0f979b8 EFLAGS: 00000012
RAX: 0000000000000008 RBX: 1ffff110141f2f43 RCX: ffffffff810059f0
RDX: 0000000000000008 RSI: ffffffff8b8cd332 RDI: ffffffff8b304eb0
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8b8cd332
R10: ffff8880a0f97b5f R11: 0000000000074071 R12: ffff8880a0f97b48
R13: ffff8880a0f97b35 R14: ffff8880a0f97b00 R15: ffffffff810059f0
FS: 00007f4691df28c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f468f1d4000 CR3: 00000000a0fad000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
orc_find arch/x86/kernel/unwind_orc.c:159 [inline]
unwind_next_frame+0x339/0x1400 arch/x86/kernel/unwind_orc.c:422
__save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44
save_stack mm/kasan/kasan.c:448 [inline]
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x126/0x1f0 mm/kasan/kasan.c:521
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
aa_free_file_ctx security/apparmor/include/file.h:76 [inline]
apparmor_file_free_security+0x9a/0xd0 security/apparmor/lsm.c:448
security_file_free+0x3e/0x70 security/security.c:885
file_free fs/file_table.c:54 [inline]
__fput+0x42a/0x890 fs/file_table.c:294
task_work_run+0x148/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f4691381840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffd29f02868 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: fffffffffffffffe RBX: 00007ffd29f02b70 RCX: 00007f4691381840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000565084a88300
RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000565084a84040 R14: 00007ffd29f02b30 R15: 0000565084a91470
----------------
Code disassembly (best guess), 2 bytes skipped:
0: e9 a7 fd ff ff jmpq 0xfffffdac
5: e8 08 de 6e 00 callq 0x6ede12
a: e9 ea fc ff ff jmpq 0xfffffcf9
f: 48 8b 3c 24 mov (%rsp),%rdi
13: e8 8a de 6e 00 callq 0x6edea2
18: e9 7b fe ff ff jmpq 0xfffffe98
1d: 90 nop
1e: 90 nop
1f: 90 nop
20: 90 nop
21: 90 nop
22: 41 57 push %r15
24: 89 d0 mov %edx,%eax
26: 41 56 push %r14
* 28: 41 55 push %r13 <-- trapping instruction
2a: 41 54 push %r12
2c: 4c 8d 64 87 fc lea -0x4(%rdi,%rax,4),%r12
31: 55 push %rbp
32: 53 push %rbx
33: 48 83 ec 10 sub $0x10,%rsp
37: 85 d2 test %edx,%edx
39: 0f .byte 0xf
3a: 84 .byte 0x84
3b: 95 xchg %eax,%ebp