Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout INFO: task syz-executor.5:10229 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.5 D28912 10229 7983 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: 0033:0x7fc68d570d4b RSP: 002b:00007fffc04a1300 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fc68d570d4b RDX: 0000001b2e420000 RSI: 0000001b2e425884 RDI: 0000000000000004 RBP: 00007fc68d6d2960 R08: 0000000000000000 R09: 00000000ebe16421 R10: 00087d3d6dd9bc39 R11: 0000000000000293 R12: 00000000000252db R13: 00007fffc04a1400 R14: 00007fc68d6d1030 R15: 0000000000000032 INFO: task syz-executor.5:10232 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.5 D28488 10232 7983 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: 0033:0x7fc68d5be109 RSP: 002b:00007fc68bf33168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fc68d6d0f60 RCX: 00007fc68d5be109 RDX: 0000000000000000 RSI: 0000000000000600 RDI: 0000000020000100 RBP: 00007fc68d61805d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc04a129f R14: 00007fc68bf33300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1534: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by syz-executor.5/10229: #0: (&sb->s_type->i_mutex_key#22){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #0: (&sb->s_type->i_mutex_key#22){+.+.}, at: [] fuse_flush+0x1c7/0x520 fs/fuse/file.c:423 2 locks held by syz-executor.5/10232: #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#22){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&sb->s_type->i_mutex_key#22){+.+.}, at: [] fuse_open_common+0x1a4/0x290 fs/fuse/file.c:217 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1534 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4626 Comm: systemd-journal Not tainted 4.14.284-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a13241c0 task.stack: ffff8880a1328000 RIP: 0010:__lock_acquire+0x37d/0x3f20 kernel/locking/lockdep.c:3433 RSP: 0018:ffff8880a132f760 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000004 RDX: 1ffff1101426494a RSI: 0000000000000000 RDI: ffff8880a1324a50 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880a1324a48 R11: ffff8880a13241c0 R12: ffffffff8c0918e0 R13: 0000000000000001 R14: 0000000000000001 R15: ffffffff8bed2d80 FS: 00007f0a0fcf38c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0a0d10f018 CR3: 00000000a10a1000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 debug_object_activate+0x10f/0x490 lib/debugobjects.c:434 debug_object_activate+0x3a3/0x490 lib/debugobjects.c:475 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline] __call_rcu.constprop.0+0x31/0x7d0 kernel/rcu/tree.c:3050 file_free fs/file_table.c:56 [inline] put_filp+0x75/0x90 fs/file_table.c:313 path_openat+0x6ce/0x2970 fs/namei.c:3581 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: 0033:0x7f0a0f282840 RSP: 002b:00007ffe97dc5ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffe97dc61f0 RCX: 00007f0a0f282840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000559152b87520 RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000559152b7a040 R14: 00007ffe97dc61b0 R15: 0000559152b88030 Code: 49 8d 7a 08 48 89 fa 48 c1 ea 03 66 25 00 e0 44 09 e8 66 41 89 42 20 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 43 27 00 00 <48> 8b 84 24 c0 01 00 00 49 8d 7a 10 48 89 fa 48 c1 ea 03 49 89 ---------------- Code disassembly (best guess): 0: 49 8d 7a 08 lea 0x8(%r10),%rdi 4: 48 89 fa mov %rdi,%rdx 7: 48 c1 ea 03 shr $0x3,%rdx b: 66 25 00 e0 and $0xe000,%ax f: 44 09 e8 or %r13d,%eax 12: 66 41 89 42 20 mov %ax,0x20(%r10) 17: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1e: fc ff df 21: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 25: 0f 85 43 27 00 00 jne 0x276e * 2b: 48 8b 84 24 c0 01 00 mov 0x1c0(%rsp),%rax <-- trapping instruction 32: 00 33: 49 8d 7a 10 lea 0x10(%r10),%rdi 37: 48 89 fa mov %rdi,%rdx 3a: 48 c1 ea 03 shr $0x3,%rdx 3e: 49 rex.WB 3f: 89 .byte 0x89