Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout INFO: task syz-executor.1:10189 blocked for more than 140 seconds. Not tainted 4.14.281-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28912 10189 7987 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x343/0x6d0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:719 [inline] fuse_flush+0x1c7/0x520 fs/fuse/file.c:423 filp_close+0x9d/0x140 fs/open.c:1158 __close_fd+0x151/0x230 fs/file.c:639 SYSC_close fs/open.c:1177 [inline] SyS_close+0x42/0x90 fs/open.c:1175 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f824fe6bd4b RSP: 002b:00007ffc85c75400 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f824fe6bd4b RDX: 0000001b2ea20000 RSI: 0000001b2ea258c4 RDI: 0000000000000004 RBP: 00007f824ffcd960 R08: 0000000000000000 R09: 0000000091eca488 R10: 0017a7423e324b6b R11: 0000000000000293 R12: 0000000000022dc8 R13: 00007ffc85c75500 R14: 00007f824ffcbf60 R15: 0000000000000032 INFO: task syz-executor.1:10214 blocked for more than 140 seconds. Not tainted 4.14.281-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28960 10214 7987 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 fuse_wait_on_page_writeback fs/fuse/file.c:385 [inline] fuse_wait_on_page_writeback.isra.0+0xdc/0x120 fs/fuse/file.c:381 fuse_launder_page fs/fuse/file.c:2042 [inline] fuse_launder_page+0xa2/0xd0 fs/fuse/file.c:2035 do_launder_page mm/truncate.c:609 [inline] invalidate_inode_pages2_range+0x547/0xc00 mm/truncate.c:685 fuse_finish_open+0x262/0x500 fs/fuse/file.c:181 fuse_open_common+0x234/0x290 fs/fuse/file.c:224 do_dentry_open+0x44b/0xec0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x628/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f824feb9109 RSP: 002b:00007f824e80d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f824ffcc030 RCX: 00007f824feb9109 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 00007f824ff1308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc85c7539f R14: 00007f824e80d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by in:imklog/7656: #0: (&p->pi_lock){-.-.}, at: [] __fdget_pos+0x1fb/0x2b0 fs/file.c:819 1 lock held by syz-executor.1/10189: #0: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #0: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] fuse_flush+0x1c7/0x520 fs/fuse/file.c:423 2 locks held by syz-executor.1/10214: #0: (sb_writers#13){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#13){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&sb->s_type->i_mutex_key#21){+.+.}, at: [] fuse_open_common+0x1a4/0x290 fs/fuse/file.c:217 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.281-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.281-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker task: ffff8880b5fee140 task.stack: ffff8880b5400000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__lock_release kernel/locking/lockdep.c:3739 [inline] RIP: 0010:lock_release+0x18b/0x870 kernel/locking/lockdep.c:4017 RSP: 0018:ffff8880b5407bc8 EFLAGS: 00000006 RAX: 0000000000000003 RBX: 1ffff11016a80f7c RCX: 1ffffffff127a500 RDX: 0000000000000004 RSI: 0000000000000002 RDI: ffff8880b5fee9c4 RBP: ffff8880920f67b0 R08: ffffffff8b9c04e0 R09: 00000000000405d3 R10: 0000000000000000 R11: ffff8880b5fee140 R12: ffffffff86eb78bc R13: ffff8880b5fee140 R14: ffff8880920f6798 R15: ffff88808df0a1c0 FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc4355e5000 CR3: 00000000b179f000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:174 [inline] _raw_spin_unlock_bh+0x17/0x30 kernel/locking/spinlock.c:208 spin_unlock_bh include/linux/spinlock.h:362 [inline] batadv_nc_purge_paths+0x20c/0x300 net/batman-adv/network-coding.c:481 batadv_nc_worker+0x660/0xc50 net/batman-adv/network-coding.c:731 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 89 c7 08 0f 82 2a 04 00 00 48 c7 c0 00 28 3d 89 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 <65> 4c 8b 34 25 c0 7f 02 00 38 d0 7c 08 84 d2 0f 85 c8 05 00 00 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 0f 82 2a 04 00 00 jb 0x430 6: 48 c7 c0 00 28 3d 89 mov $0xffffffff893d2800,%rax d: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 14: fc ff df 17: 48 89 c1 mov %rax,%rcx 1a: 83 e0 07 and $0x7,%eax 1d: 48 c1 e9 03 shr $0x3,%rcx 21: 83 c0 03 add $0x3,%eax 24: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx * 28: 65 4c 8b 34 25 c0 7f mov %gs:0x27fc0,%r14 <-- trapping instruction 2f: 02 00 31: 38 d0 cmp %dl,%al 33: 7c 08 jl 0x3d 35: 84 d2 test %dl,%dl 37: 0f 85 c8 05 00 00 jne 0x605