INFO: task syz-executor.3:11096 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:28968 pid:11096 ppid: 6899 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4527 schedule+0xcf/0x270 kernel/sched/core.c:4605 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3144 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dd99 Code: Bad RIP value. RSP: 002b:00007fac242b3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000033f00 RCX: 000000000045dd99 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007fff3d74fccf R14: 00007fac242b49c0 R15: 000000000118bf2c INFO: task syz-executor.3:11096 blocked for more than 144 seconds. Not tainted 5.9.0-rc7-next-20200929-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28968 pid:11096 ppid: 6899 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0xec5/0x2200 kernel/sched/core.c:4527 schedule+0xcf/0x270 kernel/sched/core.c:4605 request_wait_answer+0x505/0x7f0 fs/fuse/dev.c:402 __fuse_request_send fs/fuse/dev.c:421 [inline] fuse_simple_request+0x526/0xc10 fs/fuse/dev.c:503 fuse_do_getattr+0x226/0xc40 fs/fuse/dir.c:952 fuse_update_get_attr fs/fuse/dir.c:988 [inline] fuse_getattr+0x37f/0x430 fs/fuse/dir.c:1723 vfs_getattr_nosec+0x246/0x2e0 fs/stat.c:87 vfs_getattr fs/stat.c:124 [inline] vfs_statx+0x18d/0x390 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_stat include/linux/fs.h:3144 [inline] __do_sys_newstat+0x91/0x110 fs/stat.c:349 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dd99 Code: Bad RIP value. RSP: 002b:00007fac242b3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000033f00 RCX: 000000000045dd99 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200004c0 RBP: 000000000118bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007fff3d74fccf R14: 00007fac242b49c0 R15: 000000000118bf2c Showing all locks held in the system: 2 locks held by kworker/u4:1/21: #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2240 #1: ffffc90000dd7da8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2244 2 locks held by kworker/u4:5/204: #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2240 #1: ffffc90001717da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2244 1 lock held by khungtaskd/1185: #0: ffffffff8a553d00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6221 2 locks held by systemd-udevd/3930: #0: ffff8880917338c0 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x457/0x1870 fs/block_dev.c:1476 #1: ffffffff8afb2e08 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_open+0x19/0xd0 drivers/block/loop.c:1893 1 lock held by in:imklog/6745: #0: ffff8880a79ba3b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 2 locks held by syz-executor.1/6895: #0: ffff8880a4b47880 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x457/0x1870 fs/block_dev.c:1476 #1: ffffffff8afb2e08 (loop_ctl_mutex){+.+.}-{3:3}, at: lo_open+0x19/0xd0 drivers/block/loop.c:1893 2 locks held by kworker/0:16/9808: #0: ffff8880aa073538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa073538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa073538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa073538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa073538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa073538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2240 #1: ffffc900087dfda8 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2244 3 locks held by syz-executor.5/16238: #0: ffff8880a1645a90 (&sig->exec_update_mutex){+.+.}-{3:3}, at: __do_sys_perf_event_open+0xda1/0x2cb0 kernel/events/core.c:11731 #1: ffffffff8dabe4a0 (&pmus_srcu){....}-{0:0}, at: perf_event_alloc.part.0+0xc57/0x37f0 kernel/events/core.c:11254 #2: ffffffff8a5c1788 (event_mutex){+.+.}-{3:3}, at: perf_trace_init+0x49/0x240 kernel/trace/trace_event_perf.c:223 5 locks held by syz-executor.2/16241: #0: ffffffff8dabe4a0 (&pmus_srcu){....}-{0:0}, at: perf_event_alloc.part.0+0xc57/0x37f0 kernel/events/core.c:11254 #1: ffffffff8a5c1788 (event_mutex){+.+.}-{3:3}, at: perf_uprobe_init+0x164/0x210 kernel/trace/trace_event_perf.c:335 #2: ffff88809f5fe490 (&uprobe->register_rwsem){+.+.}-{3:3}, at: __uprobe_register+0x441/0x870 kernel/events/uprobes.c:1179 #3: ffffffff8a614e10 (dup_mmap_sem){++++}-{0:0}, at: register_for_each_vma+0x2c/0xbd0 kernel/events/uprobes.c:1042 #4: ffffffff8a55d828 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #4: ffffffff8a55d828 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f2/0x610 kernel/rcu/tree_exp.h:836 2 locks held by syz-executor.2/16283: #0: ffffffff8dabe4a0 (&pmus_srcu){....}-{0:0}, at: perf_event_alloc.part.0+0xc57/0x37f0 kernel/events/core.c:11254 #1: ffffffff8a5c1788 (event_mutex){+.+.}-{3:3}, at: perf_uprobe_init+0x164/0x210 kernel/trace/trace_event_perf.c:335 1 lock held by syz-executor.3/16269: #0: ffffffff8afb2e08 (loop_ctl_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x88/0xe60 drivers/block/loop.c:1213 2 locks held by kworker/u4:6/16281: #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8880aa071138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2240 #1: ffffc900064cfda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2244 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1185 Comm: khungtaskd Not tainted 5.9.0-rc7-next-20200929-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+0x198/0x1fb lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 16283 Comm: syz-executor.2 Not tainted 5.9.0-rc7-next-20200929-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:write_comp_data+0xa/0x80 kernel/kcov.c:217 Code: 65 48 8b 04 25 c0 fe 01 00 48 8b 80 48 14 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 49 89 f2 65 8b 05 76 d3 8c 7e <65> 48 8b 34 25 c0 fe 01 00 a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b RSP: 0018:ffffc90006267790 EFLAGS: 00000246 RAX: 0000000080000001 RBX: 00007ff631c1b000 RCX: ffffffff81a6c69c RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffea0001896e33 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000c R13: 0000000000000000 R14: dffffc0000000000 R15: ffffea0001896e08 FS: 0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8bdd304020 CR3: 000000006159a000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: zap_pte_range mm/memory.c:1285 [inline] zap_pmd_range mm/memory.c:1386 [inline] zap_pud_range mm/memory.c:1415 [inline] zap_p4d_range mm/memory.c:1436 [inline] unmap_page_range+0xffc/0x2b20 mm/memory.c:1457 unmap_single_vma+0x198/0x300 mm/memory.c:1502 unmap_vmas+0x168/0x2e0 mm/memory.c:1534 exit_mmap+0x2b1/0x530 mm/mmap.c:3232 __mmput+0x122/0x470 kernel/fork.c:1077 mmput+0x53/0x60 kernel/fork.c:1098 exit_mm kernel/exit.c:483 [inline] do_exit+0xa31/0x2930 kernel/exit.c:793 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x428/0x1f00 kernel/signal.c:2757 arch_do_signal+0x82/0x2470 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x194/0x1f0 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x7a/0x2c0 kernel/entry/common.c:267 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45dd99 Code: Bad RIP value. RSP: 002b:00007ff630836c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: fffffffffffffffc RBX: 0000000000024cc0 RCX: 000000000045dd99 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000080 RBP: 000000000118c0c0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000118c07c R13: 00007ffdc2a87c6f R14: 00007ff6308379c0 R15: 000000000118c07c