INFO: task syz-executor.1:12102 blocked for more than 140 seconds. Not tainted 5.0.0-rc6+ #74 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29384 12102 7743 0x20020004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 request_wait_answer+0x42f/0x7c0 fs/fuse/dev.c:530 __fuse_request_send+0x12b/0x1d0 fs/fuse/dev.c:550 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:563 fuse_simple_request+0x2f6/0x730 fs/fuse/dev.c:621 fuse_access+0x247/0x310 fs/fuse/dir.c:1077 fuse_permission+0x465/0x530 fs/fuse/dir.c:1151 do_inode_permission fs/namei.c:386 [inline] inode_permission+0x36d/0x570 fs/namei.c:451 ksys_chdir+0xdc/0x1f0 fs/open.c:443 __do_sys_chdir fs/open.c:461 [inline] __se_sys_chdir fs/open.c:459 [inline] __ia32_sys_chdir+0x30/0x40 fs/open.c:459 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff2869 Code: Bad RIP value. RSP: 002b:00000000f5dee0cc EFLAGS: 00000296 ORIG_RAX: 000000000000000c RAX: ffffffffffffffda RBX: 0000000020000480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:12365 blocked for more than 140 seconds. Not tainted 5.0.0-rc6+ #74 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29760 12365 7743 0x20020004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 request_wait_answer+0x42f/0x7c0 fs/fuse/dev.c:530 __fuse_request_send+0x12b/0x1d0 fs/fuse/dev.c:550 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:563 fuse_simple_request+0x2f6/0x730 fs/fuse/dev.c:621 fuse_access+0x247/0x310 fs/fuse/dir.c:1077 fuse_permission+0x465/0x530 fs/fuse/dir.c:1151 do_inode_permission fs/namei.c:386 [inline] inode_permission+0x36d/0x570 fs/namei.c:451 ksys_chdir+0xdc/0x1f0 fs/open.c:443 __do_sys_chdir fs/open.c:461 [inline] __se_sys_chdir fs/open.c:459 [inline] __ia32_sys_chdir+0x30/0x40 fs/open.c:459 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff2869 Code: Bad RIP value. RSP: 002b:00000000f5dee0cc EFLAGS: 00000296 ORIG_RAX: 000000000000000c RAX: ffffffffffffffda RBX: 0000000020000480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:12498 blocked for more than 140 seconds. Not tainted 5.0.0-rc6+ #74 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29760 12498 7743 0x20020004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 request_wait_answer+0x42f/0x7c0 fs/fuse/dev.c:530 __fuse_request_send+0x12b/0x1d0 fs/fuse/dev.c:550 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:563 fuse_simple_request+0x2f6/0x730 fs/fuse/dev.c:621 fuse_access+0x247/0x310 fs/fuse/dir.c:1077 fuse_permission+0x465/0x530 fs/fuse/dir.c:1151 do_inode_permission fs/namei.c:386 [inline] inode_permission+0x36d/0x570 fs/namei.c:451 ksys_chdir+0xdc/0x1f0 fs/open.c:443 __do_sys_chdir fs/open.c:461 [inline] __se_sys_chdir fs/open.c:459 [inline] __ia32_sys_chdir+0x30/0x40 fs/open.c:459 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff2869 Code: Bad RIP value. RSP: 002b:00000000f5dee0cc EFLAGS: 00000296 ORIG_RAX: 000000000000000c RAX: ffffffffffffffda RBX: 0000000020000480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:12515 blocked for more than 140 seconds. Not tainted 5.0.0-rc6+ #74 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29760 12515 7743 0x20020004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 request_wait_answer+0x42f/0x7c0 fs/fuse/dev.c:530 __fuse_request_send+0x12b/0x1d0 fs/fuse/dev.c:550 fuse_request_send+0x60/0xa0 fs/fuse/dev.c:563 fuse_simple_request+0x2f6/0x730 fs/fuse/dev.c:621 fuse_access+0x247/0x310 fs/fuse/dir.c:1077 fuse_permission+0x465/0x530 fs/fuse/dir.c:1151 do_inode_permission fs/namei.c:386 [inline] inode_permission+0x36d/0x570 fs/namei.c:451 ksys_chdir+0xdc/0x1f0 fs/open.c:443 __do_sys_chdir fs/open.c:461 [inline] __se_sys_chdir fs/open.c:459 [inline] __ia32_sys_chdir+0x30/0x40 fs/open.c:459 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff2869 Code: Bad RIP value. RSP: 002b:00000000f5dee0cc EFLAGS: 00000296 ORIG_RAX: 000000000000000c RAX: ffffffffffffffda RBX: 0000000020000480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1039: #0: 00000000b5ea4e11 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/7613: 2 locks held by getty/7703: #0: 00000000dd89911c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000007c598f01 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7704: #0: 000000002e4bc5ee (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d3e65bbf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7705: #0: 000000000d0dbde9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f833579e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7706: #0: 000000009c958af6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000059817d33 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7707: #0: 00000000be75c77c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000028e0963f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7708: #0: 0000000045a14d3b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e882cc4d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7709: #0: 00000000ce923fc0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a2a1212e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 3 locks held by kworker/u4:5/9366: #0: 0000000074c79c7e (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9934 [inline] #0: 0000000074c79c7e (&rq->lock){-.-.}, at: pick_next_task_fair+0x10f3/0x1860 kernel/sched/fair.c:7017 #1: 00000000b5ea4e11 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:6014 #2: 000000008e8a1c49 (&base->lock){-.-.}, at: lock_timer_base+0x56/0x1b0 kernel/time/timer.c:937 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc6+ #74 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9366 Comm: kworker/u4:5 Not tainted 5.0.0-rc6+ #74 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:separate_irq_context kernel/locking/lockdep.c:2989 [inline] RIP: 0010:__lock_acquire+0xba6/0x4700 kernel/locking/lockdep.c:3329 Code: 48 8b 8c 24 88 00 00 00 48 8d 04 80 48 8d 4c c1 d8 48 b8 00 00 00 00 00 fc ff df 48 8d 79 21 48 89 fa 48 c1 ea 03 0f b6 04 02 <48> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 6b 2a 00 00 49 8d 7a 21 RSP: 0018:ffff88805b0efa80 EFLAGS: 00000806 RAX: 0000000000000000 RBX: 000000000000002b RCX: ffff88808dd5e9a8 RDX: 1ffff11011babd39 RSI: ffff88808dd5e9d0 RDI: ffff88808dd5e9c9 RBP: ffff88805b0efc50 R08: 0000000000000002 R09: ffff88808dd5e9f0 R10: ffff88808dd5e9d0 R11: 0000000000000000 R12: ffff88808dd5e9e8 R13: ef94dfb8c73d92d8 R14: 000000000000002b R15: ffff88808dd5e100 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000a4e1c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 rcu_lock_acquire include/linux/rcupdate.h:223 [inline] rcu_read_lock include/linux/rcupdate.h:607 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:419 [inline] batadv_nc_worker+0x117/0x760 net/batman-adv/network-coding.c:730 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352