Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout INFO: task syz-executor.0:9651 blocked for more than 140 seconds. Not tainted 4.14.284-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28912 9651 8013 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: 0033:0x7fbd2fdf6d4b RSP: 002b:00007ffd7e589010 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fbd2fdf6d4b RDX: 0000001b30220000 RSI: 0000001b30225964 RDI: 0000000000000004 RBP: 00007fbd2ff58960 R08: 0000000000000000 R09: 00000000ebe16421 R10: 0011ec8a9f0d5ae5 R11: 0000000000000293 R12: 0000000000026b88 R13: 00007ffd7e589110 R14: 00007fbd2ff57030 R15: 0000000000000032 INFO: task syz-executor.0:9652 blocked for more than 140 seconds. Not tainted 4.14.284-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28088 9652 8013 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: 0033:0x7fbd2fe44109 RSP: 002b:00007fbd2e7b9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fbd2ff56f60 RCX: 00007fbd2fe44109 RDX: 0000000000000000 RSI: 0000000000000300 RDI: 0000000020000100 RBP: 00007fbd2fe9e05d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd7e588faf R14: 00007fbd2e7b9300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1517: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by in:imklog/7755: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 fs/file.c:819 1 lock held by syz-executor.0/9651: #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.0/9652: #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 1 CPU: 1 PID: 1517 Comm: khungtaskd Not tainted 4.14.284-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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3564 Comm: kworker/u4:5 Not tainted 4.14.284-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker task: ffff8880a8d58240 task.stack: ffff8880a8d18000 RIP: 0010:__lock_release kernel/locking/lockdep.c:3795 [inline] RIP: 0010:lock_release+0x30f/0x870 kernel/locking/lockdep.c:4017 RSP: 0018:ffff8880a8d1fc48 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 1ffff110151a3f8c RCX: 1ffff110151ab158 RDX: ffff8880a8d58b18 RSI: ffffffff88f78040 RDI: ffff8880a8d58b3a RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8880a8d58240 R12: ffffffff86ebbb60 R13: ffffffff8bed2d80 R14: ffff8880a8d58240 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f36aabe1000 CR3: 00000000a941c000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:685 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:422 [inline] batadv_nc_worker+0x5a7/0xc50 net/batman-adv/network-coding.c:728 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: bf 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 08 8b 6c 24 38 48 c1 e9 03 0f b6 04 01 84 c0 74 08 3c 03 0f 8e c6 04 00 00 <48> 89 d1 41 89 ae 80 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 00 00 add %al,(%rax) 2: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 9: fc ff df c: 48 8b 4c 24 08 mov 0x8(%rsp),%rcx 11: 8b 6c 24 38 mov 0x38(%rsp),%ebp 15: 48 c1 e9 03 shr $0x3,%rcx 19: 0f b6 04 01 movzbl (%rcx,%rax,1),%eax 1d: 84 c0 test %al,%al 1f: 74 08 je 0x29 21: 3c 03 cmp $0x3,%al 23: 0f 8e c6 04 00 00 jle 0x4ef * 29: 48 89 d1 mov %rdx,%rcx <-- trapping instruction 2c: 41 89 ae 80 08 00 00 mov %ebp,0x880(%r14) 33: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3a: fc ff df 3d: 48 rex.W