INFO: task syz-executor.5:5896 blocked for more than 143 seconds.
      Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26504  5896   7694 0xa0024006
Call Trace:
 context_switch kernel/sched/core.c:3367 [inline]
 __schedule+0x937/0x1ff0 kernel/sched/core.c:4083
 __sched_text_start+0x8/0x8
 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:78 [inline]
 do_raw_spin_lock+0x129/0x2e0 kernel/locking/spinlock_debug.c:113
 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329
 schedule+0xd0/0x2a0 kernel/sched/core.c:4158
 rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235
 rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199
 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934
 unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689
 inode_lock include/linux/fs.h:797 [inline]
 __sock_release+0x86/0x280 net/socket.c:604
 __sock_release+0x280/0x280 net/socket.c:605
 __down_write kernel/locking/rwsem.c:1389 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1532
 atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1504 [inline]
 atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline]
 __down_write kernel/locking/rwsem.c:1387 [inline]
 down_write+0xb2/0x150 kernel/locking/rwsem.c:1532
 __down_write kernel/locking/rwsem.c:1389 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1532
 __down_timeout+0x2d0/0x2d0
 unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
 __sock_release+0x280/0x280 net/socket.c:605
 raw_release+0x53/0x730 net/can/raw.c:354
 fcntl_setlk+0xcc0/0xcc0 fs/locks.c:2542
 __sock_release+0x280/0x280 net/socket.c:605
 __sock_release+0xcd/0x280 net/socket.c:605
 sock_close+0x18/0x20 net/socket.c:1283
 __fput+0x33e/0x880 fs/file_table.c:280
 task_work_run+0xf4/0x1b0 kernel/task_work.c:123
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xb34/0x2dd0 kernel/exit.c:796
 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934
 mm_update_next_owner+0x7a0/0x7a0 kernel/exit.c:375
 apparmor_file_alloc_security+0x333/0xb10 security/apparmor/lsm.c:444
 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579
 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:78 [inline]
 do_raw_spin_lock+0x129/0x2e0 kernel/locking/spinlock_debug.c:113
 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329
 do_group_exit+0x125/0x340 kernel/exit.c:894
 get_signal+0x47b/0x24e0 kernel/signal.c:2739
 __get_unused_fd_flags+0x60/0x60 fs/file.c:545
 do_signal+0x81/0x2240 arch/x86/kernel/signal.c:784
 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579
 alloc_file+0x4e0/0x4e0 fs/file_table.c:205
 pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:650 [inline]
 queued_spin_unlock arch/x86/include/asm/qspinlock.h:55 [inline]
 do_raw_spin_unlock+0x171/0x260 kernel/locking/spinlock_debug.c:139
 get_sigframe.isra.0+0x730/0x730 arch/x86/kernel/signal.c:268
 rcu_read_unlock_sched include/linux/rcupdate.h:732 [inline]
 __fd_install+0x1e6/0x600 fs/file.c:613
 __sys_socket+0x16d/0x200 net/socket.c:438
 move_addr_to_kernel+0x70/0x70 net/socket.c:195
 __x64_sys_clock_gettime32+0x240/0x240 kernel/time/posix-timers.c:1410
 exit_to_usermode_loop+0x26c/0x360 arch/x86/entry/common.c:161
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
 do_syscall_32_irqs_on arch/x86/entry/common.c:340 [inline]
 do_fast_syscall_32+0xbef/0xe90 arch/x86/entry/common.c:396
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 1139 Comm: khungtaskd Not tainted 5.7.0-rc6-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+0x188/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 lapic_can_unplug_cpu.cold+0x3b/0x3b
 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0xa8c/0x1010 kernel/hung_task.c:289
 reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243
 kthread+0x388/0x470 kernel/kthread.c:268
 kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4151 Comm: systemd-journal Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:153 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:187
Code: cc 65 48 8b 04 25 00 1f 02 00 48 8b 80 f0 13 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 65 48 8b 04 25 00 1f 02 00 <65> 8b 15 28 e8 8e 7e 81 e2 00 01 1f 00 48 8b 34 24 75 2b 8b 90 d8
RSP: 0018:ffffc90001577b70 EFLAGS: 00000246
RAX: ffff888093b74040 RBX: 0000000000000000 RCX: ffffffff81bf70fa
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000077865acb0 R08: ffff888093b74040 R09: ffffed1012face6a
R10: ffff888097d67348 R11: ffffed1012face69 R12: 072aea13b760b3a2
R13: dffffc0000000000 R14: ffff88801b25e7bc R15: ffffc90001577cf0
FS:  00007fdd3b1a48c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd386cd000 CR3: 0000000093927000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 link_path_walk.part.0+0x487/0xb50 fs/namei.c:2158
 walk_component+0x6a0/0x6a0 fs/namei.c:482
 __bfs+0x520/0x520 kernel/locking/lockdep.c:1539
 link_path_walk fs/namei.c:2097 [inline]
 path_lookupat.isra.0+0x8d/0x530 fs/namei.c:2318
 filename_lookup+0x1a3/0x3e0 fs/namei.c:2352
 nd_jump_link+0x360/0x360 fs/namei.c:895
 __phys_addr_symbol+0x2c/0x70 arch/x86/mm/physaddr.c:42
 overlaps mm/usercopy.c:110 [inline]
 check_kernel_text_object mm/usercopy.c:142 [inline]
 __check_object_size mm/usercopy.c:289 [inline]
 __check_object_size+0x171/0x437 mm/usercopy.c:256
 audit_getname include/linux/audit.h:328 [inline]
 getname_flags fs/namei.c:202 [inline]
 getname_flags+0x275/0x5b0 fs/namei.c:128
 security_prepare_creds+0xee/0x180 security/security.c:1604
 user_path_at include/linux/namei.h:59 [inline]
 do_faccessat+0x248/0x7a0 fs/open.c:398
 __ia32_sys_fallocate+0xf0/0xf0 fs/open.c:338
 trace_hardirqs_off+0x50/0x220 kernel/trace/trace_preemptirq.c:45
 trace_hardirqs_off_caller+0x55/0x230 kernel/trace/trace_preemptirq.c:73
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x7fdd3a4609c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd298cbf18 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffd298cef40 RCX: 00007fdd3a4609c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055f2615209a3
RBP: 00007ffd298cc060 R08: 000055f2615163e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 000055f26253e8a0 R15: 00007ffd298cc550