IPVS: Creating netns size=2552 id=9
INFO: task syz-executor0:5854 blocked for more than 120 seconds.
      Not tainted 4.4.116-g17c7c49 #17
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D ffff8801c16ff768 28736  5854   3850 0x00000004
 ffff8801c16ff768 0000000000000000 0000000000000000 0000000000000000
 0000000000000001 ffff8801c16ff700 ffff8801db31fdb8 ffff8801db31fde0
 ffff8801db31f4d8 ffff8801d9b49800 ffff8800a6709800 0000000000000000
Call Trace:
 [<ffffffff837668ca>] schedule+0x7a/0x1b0 kernel/sched/core.c:3353
 [<ffffffff837670c3>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3386
 [<ffffffff8376b686>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8376b686>] mutex_lock_nested+0x306/0x850 kernel/locking/mutex.c:621
 [<ffffffff82d42a7f>] odev_open+0x5f/0x90 sound/core/seq/oss/seq_oss.c:136
 [<ffffffff82ca1a01>] soundcore_open+0x321/0x630 sound/sound_core.c:639
 [<ffffffff81529d8b>] chrdev_open+0x22b/0x4c0 fs/char_dev.c:388
 [<ffffffff81517f5b>] do_dentry_open+0x59b/0xba0 fs/open.c:749
 [<ffffffff8151b820>] vfs_open+0x110/0x210 fs/open.c:862
 [<ffffffff8154ca83>] do_last fs/namei.c:3217 [inline]
 [<ffffffff8154ca83>] path_openat+0x923/0x3940 fs/namei.c:3353
 [<ffffffff81552727>] do_filp_open+0x197/0x290 fs/namei.c:3388
 [<ffffffff8151c1f9>] do_sys_open+0x369/0x660 fs/open.c:1038
 [<ffffffff8151c560>] SYSC_openat fs/open.c:1065 [inline]
 [<ffffffff8151c560>] SyS_openat+0x30/0x40 fs/open.c:1059
 [<ffffffff83774a1f>] entry_SYSCALL_64_fastpath+0x1c/0x98
INFO: lockdep is turned off.
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 3636 Comm: rsyslogd Not tainted 4.4.116-g17c7c49 #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800ac53b000 task.stack: ffff8801c7130000
RIP: 0010:[<ffffffff812eb471>]  [<ffffffff812eb471>] __module_text_address+0xf1/0x140 kernel/module.c:4116
RSP: 0018:ffff8801c7137768  EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8801d05c8480 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814fd4fd RDI: ffff8801d05c8480
RBP: ffff8801c7137780 R08: ffff8801c71378b8 R09: 0000000000000000
R10: 0000000000000000 R11: 1ffff10038e26f30 R12: ffff8801c7137b18
R13: ffffffffffff8000 R14: ffff8801c7137af0 R15: ffff8801d05c8480
FS:  00007f28fe2e1700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c42305f010 CR3: 00000000ac432000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000085 ffff8801d05c8480 ffff8801c7137b18 ffff8801c7137798
 ffffffff812f8cea ffff8801d05c8480 ffff8801c71377b0 ffffffff8118bbab
 0000000000000000 ffff8801c7137808 ffffffff810179b8 ffff8801c7130000
Call Trace:
 [<ffffffff812f8cea>] is_module_text_address+0x1a/0x50 kernel/module.c:4093
 [<ffffffff8118bbab>] __kernel_text_address+0x6b/0xa0 kernel/extable.c:103
 [<ffffffff810179b8>] print_context_stack+0x48/0xc0 arch/x86/kernel/dumpstack.c:107
 [<ffffffff81016b95>] dump_trace+0x145/0x350 arch/x86/kernel/dumpstack_64.c:243
 [<ffffffff81035de6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd233>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd4fd>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd4fd>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fdad2>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f943e>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f943e>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f943e>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f943e>] kmem_cache_alloc_trace+0xbe/0x2b0 mm/slub.c:2640
 [<ffffffff81268ecf>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff81268ecf>] syslog_print kernel/printk/printk.c:1148 [inline]
 [<ffffffff81268ecf>] do_syslog+0x60f/0xae0 kernel/printk/printk.c:1331
 [<ffffffff8168efa4>] kmsg_read+0x74/0xa0 fs/proc/kmsg.c:39
 [<ffffffff81665daf>] proc_reg_read+0xef/0x170 fs/proc/inode.c:202
 [<ffffffff8151cfb3>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151ee53>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff81521799>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff81521799>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<ffffffff83774a1f>] entry_SYSCALL_64_fastpath+0x1c/0x98
Code: df 48 89 fe 48 c1 ee 03 80 3c 0e 00 75 49 48 8b 90 c8 01 00 00 48 39 da 77 11 4c 01 e2 48 39 d3 73 09 48 83 c4 08 5b 41 5c 5d c3 <48> 83 c4 08 31 c0 5b 41 5c 5d c3 48 89 45 e8 e8 7b 33 21 00 48 
NMI backtrace for cpu 1
CPU: 1 PID: 486 Comm: khungtaskd Not tainted 4.4.116-g17c7c49 #17
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bb32c800 task.stack: ffff8800bb2e0000
RIP: 0010:[<ffffffff810c3eb7>]  [<ffffffff810c3eb7>] native_apic_mem_write arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810c3eb7>]  [<ffffffff810c3eb7>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810c3eb7>]  [<ffffffff810c3eb7>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810c3eb7>]  [<ffffffff810c3eb7>] flat_send_IPI_mask+0xf7/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800bb2e7cb8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: ffffffff8126a2f2
RDX: 0000000000000c00 RSI: 0000000000000002 RDI: ffffffffff5fb300
RBP: ffff8800bb2e7ce0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: fffffbfff0ad7e24 R12: 0000000000000246
R13: 0000000000000003 R14: ffffffff8426f3e0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc018e34000 CR3: 00000000ac432000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8426f3e0 ffffffff847ef800 fffffbfff08fd9b4 dffffc0000000000
 ffff8801db31bca0 ffff8800bb2e7d00 ffffffff810b99eb ffffffff839f61c0
 0000000000000003 ffff8800bb2e7d60 ffffffff81d0eed4 0000000000000001
Call Trace:
 [<ffffffff810b99eb>] nmi_raise_cpu_backtrace+0x5b/0x70 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81d0eed4>] nmi_trigger_all_cpu_backtrace+0x4a4/0x550 lib/nmi_backtrace.c:85
 [<ffffffff810b9a84>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff81368caa>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff81368caa>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81368caa>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81368caa>] watchdog+0x6fa/0xae0 kernel/hung_task.c:238
 [<ffffffff811907e8>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83774e45>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
Code: b3 5f ff f6 c4 10 75 e1 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 74 1a e8 7b 2f 17 00 4c 89 e7 57 9d 0f 1f