INFO: task syz-executor.5:11890 blocked for more than 143 seconds. Not tainted 5.13.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:26232 pid:11890 ppid: 8727 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0xb98/0x1120 kernel/sched/core.c:5147 schedule+0x14b/0x200 kernel/sched/core.c:5226 rwsem_down_write_slowpath+0xe52/0x1590 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x165/0x170 kernel/locking/rwsem.c:1407 register_netdevice_notifier+0xad/0xa80 net/core/dev.c:1902 raw_init+0x1ef/0x300 net/can/raw.c:339 can_create+0x247/0x450 net/can/af_can.c:168 __sock_create+0x59b/0x8c0 net/socket.c:1408 sock_create net/socket.c:1459 [inline] __sys_socket+0x115/0x350 net/socket.c:1501 __do_sys_socket net/socket.c:1510 [inline] __se_sys_socket net/socket.c:1508 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1508 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f4bbd7e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffd0a67d1af R14: 00007f4bbd7e9300 R15: 0000000000022000 INFO: task syz-executor.5:11892 blocked for more than 143 seconds. Not tainted 5.13.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:21176 pid:11892 ppid: 8727 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0xb98/0x1120 kernel/sched/core.c:5147 schedule+0x14b/0x200 kernel/sched/core.c:5226 rwsem_down_write_slowpath+0xe52/0x1590 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x165/0x170 kernel/locking/rwsem.c:1407 register_netdevice_notifier+0xad/0xa80 net/core/dev.c:1902 raw_init+0x1ef/0x300 net/can/raw.c:339 can_create+0x247/0x450 net/can/af_can.c:168 __sock_create+0x59b/0x8c0 net/socket.c:1408 sock_create net/socket.c:1459 [inline] __sys_socket+0x115/0x350 net/socket.c:1501 __do_sys_socket net/socket.c:1510 [inline] __se_sys_socket net/socket.c:1508 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1508 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f4bbd7c8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffd0a67d1af R14: 00007f4bbd7c8300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:5/186: #0: ffff8880119af938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7aa/0x10c0 kernel/workqueue.c:2249 #1: ffffc9000173fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7e8/0x10c0 kernel/workqueue.c:2251 #2: ffffffff8df1f870 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc60 net/core/net_namespace.c:557 1 lock held by khungtaskd/1631: #0: ffffffff8cf15c80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8078: #0: ffff888014da2af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974 1 lock held by syz-executor.5/11890: #0: ffffffff8df1f870 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0xad/0xa80 net/core/dev.c:1902 1 lock held by syz-executor.5/11892: #0: ffffffff8df1f870 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0xad/0xa80 net/core/dev.c:1902 1 lock held by syz-executor.2/12076: #0: ffffffff8df1f870 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x378/0x5e0 net/core/net_namespace.c:470 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1631 Comm: khungtaskd Not tainted 5.13.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x202/0x31e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xcfb/0xd40 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4845 Comm: systemd-journal Not tainted 5.13.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memcpy_erms+0x8/0x10 arch/x86/lib/memcpy_64.S:56 Code: cc cc eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe 7c 35 RSP: 0018:ffffc90000dc0b98 EFLAGS: 00000202 RAX: ffffc90000dc0be0 RBX: ffffffff87fc87b0 RCX: 0000000000000000 RDX: 0000000000000028 RSI: ffff888029590460 RDI: ffffc90000dc0c08 RBP: ffffc90000dc0c90 R08: dffffc0000000000 R09: fffff520001b8181 R10: fffff520001b8181 R11: 0000000000000000 R12: ffff888029590410 R13: ffffc90000dc0be0 R14: 0000000000000101 R15: 1ffff920001b8178 FS: 00007ffa1abf28c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffa18024000 CR3: 000000001cd13000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_copy_map include/linux/lockdep.h:35 [inline] call_timer_fn+0xac/0x210 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1476 [inline] __run_timers+0x6ff/0x910 kernel/time/timer.c:1745 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1758 __do_softirq+0x372/0x7a6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x245/0x280 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:__module_address+0x12/0x340 kernel/module.c:4645 Code: 41 5c 41 5d 41 5e 41 5f 5d c3 e8 e0 63 8c ff eb e7 0f 1f 80 00 00 00 00 55 41 57 41 56 41 55 41 54 53 50 48 39 3d 5e 04 4d 0b <0f> 87 9b 02 00 00 49 89 ff 48 39 3d 56 04 4d 0b 0f 82 8b 02 00 00 RSP: 0018:ffffc9000160f930 EFLAGS: 00000282 RAX: 1ffff11002e9f606 RBX: 00007ffa19ead9c7 RCX: ffffffff89c33700 RDX: ffffc9000160ff58 RSI: 0000000000000001 RDI: 00007ffa19ead9c7 RBP: 0000000000000001 R08: 0000000000000012 R09: ffffc9000160fab0 R10: fffff520002c1f48 R11: 0000000000000000 R12: ffff8880174f9c40 R13: ffffffff816cee00 R14: 00007ffa19ead9c7 R15: 1ffff920002c1f45 __module_text_address kernel/module.c:4687 [inline] is_module_text_address+0x1e/0x130 kernel/module.c:4672 kernel_text_address kernel/extable.c:145 [inline] __kernel_text_address+0x81/0x100 kernel/extable.c:105 unwind_get_return_address+0x48/0x80 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0x98/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x104/0x1e0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] __kasan_slab_alloc+0x96/0xd0 mm/kasan/common.c:461 kasan_slab_alloc include/linux/kasan.h:236 [inline] slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2921 [inline] kmem_cache_alloc+0x1d7/0x340 mm/slub.c:2926 prepare_creds+0x3d/0x5f0 kernel/cred.c:258 access_override_creds fs/open.c:355 [inline] do_faccessat+0xd2/0x910 fs/open.c:419 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ffa19ead9c7 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:00007ffd4f1d1618 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffd4f1d4530 RCX: 00007ffa19ead9c7 RDX: 00007ffa1a91ea00 RSI: 0000000000000000 RDI: 0000556b8f3b29a3 RBP: 00007ffd4f1d1650 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffd4f1d4530 R15: 00007ffd4f1d1b40