INFO: task syz-executor.0:22718 blocked for more than 140 seconds. Not tainted 4.19.154-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29504 22718 8125 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 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_do_getattr+0x230/0xc50 fs/fuse/dir.c:927 fuse_update_get_attr fs/fuse/dir.c:960 [inline] fuse_getattr+0x261/0x2e0 fs/fuse/dir.c:1838 vfs_getattr_nosec+0xff/0x160 fs/stat.c:79 vfs_getattr fs/stat.c:116 [inline] vfs_statx+0x15a/0x210 fs/stat.c:189 vfs_stat include/linux/fs.h:3133 [inline] __do_sys_newstat fs/stat.c:337 [inline] __se_sys_newstat+0x96/0x120 fs/stat.c:333 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45deb9 Code: f9 00 48 8d 15 88 7e 61 01 48 89 14 24 e8 cf ce fa ff 0f b6 44 24 2f 3c 00 0f 85 10 01 00 00 e8 7d 7e fd ff 48 8d 05 ba 45 50 <00> 48 89 04 24 48 c7 44 24 08 11 00 00 00 e8 a4 87 fd ff 8b 44 24 RSP: 002b:00007f4875b0ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035180 RCX: 000000000045deb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffeac05843f R14: 00007f4875b0b9c0 R15: 000000000118bf2c INFO: task syz-executor.0:22810 blocked for more than 140 seconds. Not tainted 4.19.154-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29504 22810 8125 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 request_wait_answer+0x3dc/0x750 fs/fuse/dev.c:485 __fuse_request_send+0x123/0x1c0 fs/fuse/dev.c:505 fuse_simple_request+0x2e6/0x820 fs/fuse/dev.c:576 fuse_do_getattr+0x230/0xc50 fs/fuse/dir.c:927 fuse_update_get_attr fs/fuse/dir.c:960 [inline] fuse_getattr+0x261/0x2e0 fs/fuse/dir.c:1838 vfs_getattr_nosec+0xff/0x160 fs/stat.c:79 vfs_getattr fs/stat.c:116 [inline] vfs_statx+0x15a/0x210 fs/stat.c:189 vfs_stat include/linux/fs.h:3133 [inline] __do_sys_newstat fs/stat.c:337 [inline] __se_sys_newstat+0x96/0x120 fs/stat.c:333 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45deb9 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4875b0ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000035180 RCX: 000000000045deb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c hashlimit_mt_check_common: 14 callbacks suppressed xt_hashlimit: overflow, try lower: 72057594037927936/127 R13: 00007ffeac05843f R14: 00007f4875b0b9c0 R15: 000000000118bf2c Showing all locks held in the system: 1 lock held by khungtaskd/1566: #0: 00000000f6a7a217 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7794: #0: 000000002e7f5a33 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by syz-executor.4/2047: 1 lock held by systemd-udevd/2048: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1566 Comm: khungtaskd Not tainted 4.19.154-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/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9592 Comm: kworker/u4:7 Not tainted 4.19.154-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:match_held_lock kernel/locking/lockdep.c:3479 [inline] RIP: 0010:__lock_is_held+0x82/0x160 kernel/locking/lockdep.c:3727 Code: df 4d 8d a7 88 08 00 00 85 c0 7f 4d e9 b8 00 00 00 48 8d 7b 22 48 89 f8 48 c1 e8 03 42 0f b6 14 28 48 89 f8 83 e0 07 83 c0 01 <38> d0 7c 08 84 d2 0f 85 b5 00 00 00 66 f7 43 22 f0 ff 74 0f 4c 89 RSP: 0018:ffff8880ba007ae8 EFLAGS: 00000006 RAX: 0000000000000003 RBX: ffff888056c76b50 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff888056c76b72 RBP: 0000000000000005 R08: 0000000000000000 R09: ffffed1017404552 R10: ffff8880ba022a93 R11: ffffffff8c65c01b R12: ffff888056c76a88 R13: dffffc0000000000 R14: ffffffff89fa8718 R15: ffff888056c76200 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffeb18cae89 CR3: 0000000097271000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_is_held_type+0x10d/0x210 kernel/locking/lockdep.c:3945 lock_is_held include/linux/lockdep.h:344 [inline] task_css include/linux/cgroup.h:483 [inline] task_ca kernel/sched/cpuacct.c:43 [inline] cpuacct_charge+0x278/0x350 kernel/sched/cpuacct.c:349 cgroup_account_cputime include/linux/cgroup.h:767 [inline] update_curr+0x2ce/0x870 kernel/sched/fair.c:858 enqueue_entity+0xdba/0x3850 kernel/sched/fair.c:3955 enqueue_task_fair+0x12e/0x2270 kernel/sched/fair.c:5177 ttwu_activate kernel/sched/core.c:1639 [inline] ttwu_do_activate+0xce/0x1e0 kernel/sched/core.c:1698 ttwu_queue kernel/sched/core.c:1843 [inline] try_to_wake_up+0x700/0x1050 kernel/sched/core.c:2052 hrtimer_wakeup+0x43/0x60 kernel/time/hrtimer.c:1649 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101 Code: 00 00 e9 39 ec ff ff 90 48 8b 34 24 65 48 8b 04 25 80 df 01 00 65 8b 15 fc 0f 9d 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 <83> fa 02 75 20 48 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 RSP: 0018:ffff888056c7fc50 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff888056c76200 RBX: 0000000000000001 RCX: ffffffff837fe533 RDX: 0000000000000000 RSI: ffffffff837fe541 RDI: 0000000000000005 RBP: ffffffff88b3afe0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88b3afa0 R14: 0000000000000222 R15: ffff8880a4419800 check_preemption_disabled+0x41/0x280 lib/smp_processor_id.c:51 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_unlock include/linux/rcupdate.h:677 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:423 [inline] batadv_nc_worker+0x936/0xd50 net/batman-adv/network-coding.c:730 process_one_work+0x864/0x1570 kernel/workqueue.c:2155 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415