Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout INFO: task syz-executor.1:7993 blocked for more than 140 seconds. Not tainted 4.14.300-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D25704 7993 1 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 io_schedule+0xb5/0x120 kernel/sched/core.c:5035 wait_on_page_bit_common mm/filemap.c:1025 [inline] wait_on_page_bit+0x241/0x320 mm/filemap.c:1058 wait_on_page_writeback include/linux/pagemap.h:543 [inline] __filemap_fdatawait_range+0x1d9/0x2e0 mm/filemap.c:437 filemap_fdatawait_keep_errors+0x1e/0x80 mm/filemap.c:526 wait_sb_inodes fs/fs-writeback.c:2310 [inline] sync_inodes_sb+0x530/0x880 fs/fs-writeback.c:2450 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x12f/0x230 fs/sync.c:48 generic_shutdown_super+0x70/0x370 fs/super.c:432 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 INFO: task syz-executor.0:7996 blocked for more than 140 seconds. Not tainted 4.14.300-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D25832 7996 7985 0x00000000 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 io_schedule+0xb5/0x120 kernel/sched/core.c:5035 wait_on_page_bit_common mm/filemap.c:1025 [inline] wait_on_page_bit+0x241/0x320 mm/filemap.c:1058 wait_on_page_writeback include/linux/pagemap.h:543 [inline] __filemap_fdatawait_range+0x1d9/0x2e0 mm/filemap.c:437 filemap_fdatawait_keep_errors+0x1e/0x80 mm/filemap.c:526 wait_sb_inodes fs/fs-writeback.c:2310 [inline] sync_inodes_sb+0x530/0x880 fs/fs-writeback.c:2450 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x12f/0x230 fs/sync.c:48 generic_shutdown_super+0x70/0x370 fs/super.c:432 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 INFO: task syz-executor.3:8002 blocked for more than 140 seconds. Not tainted 4.14.300-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D24832 8002 7991 0x00000000 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 io_schedule+0xb5/0x120 kernel/sched/core.c:5035 wait_on_page_bit_common mm/filemap.c:1025 [inline] wait_on_page_bit+0x241/0x320 mm/filemap.c:1058 wait_on_page_writeback include/linux/pagemap.h:543 [inline] __filemap_fdatawait_range+0x1d9/0x2e0 mm/filemap.c:437 filemap_fdatawait_keep_errors+0x1e/0x80 mm/filemap.c:526 wait_sb_inodes fs/fs-writeback.c:2310 [inline] sync_inodes_sb+0x530/0x880 fs/fs-writeback.c:2450 __sync_filesystem fs/sync.c:34 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x12f/0x230 fs/sync.c:48 generic_shutdown_super+0x70/0x370 fs/super.c:432 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 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 2 locks held by syz-executor.1/7993: #0: (&type->s_umount_key#48){+.+.}, at: [] deactivate_super+0x77/0xa0 fs/super.c:349 #1: (&s->s_sync_lock){+.+.}, at: [] wait_sb_inodes fs/fs-writeback.c:2249 [inline] #1: (&s->s_sync_lock){+.+.}, at: [] sync_inodes_sb+0x1d7/0x880 fs/fs-writeback.c:2450 2 locks held by syz-executor.0/7996: #0: (&type->s_umount_key#48){+.+.}, at: [] deactivate_super+0x77/0xa0 fs/super.c:349 #1: (&s->s_sync_lock){+.+.}, at: [] wait_sb_inodes fs/fs-writeback.c:2249 [inline] #1: (&s->s_sync_lock){+.+.}, at: [] sync_inodes_sb+0x1d7/0x880 fs/fs-writeback.c:2450 2 locks held by syz-executor.3/8002: #0: (&type->s_umount_key#48){+.+.}, at: [] deactivate_super+0x77/0xa0 fs/super.c:349 #1: (&s->s_sync_lock){+.+.}, at: [] wait_sb_inodes fs/fs-writeback.c:2249 [inline] #1: (&s->s_sync_lock){+.+.}, at: [] sync_inodes_sb+0x1d7/0x880 fs/fs-writeback.c:2450 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.300-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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:406 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.300-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: bat_events batadv_nc_worker task: ffff8880b5fec140 task.stack: ffff8880b5ff8000 RIP: 0010:find_held_lock+0x1a2/0x210 kernel/locking/lockdep.c:3626 RSP: 0018:ffff8880b5fffc30 EFLAGS: 00000097 RAX: ffff8880b5feca18 RBX: 1ffff11016bfff8c RCX: ffff8880b5fffc80 RDX: 0000000000000004 RSI: ffffffff88f78600 RDI: ffff8880b5feca28 RBP: ffffffff88f78600 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8880b5fec140 R12: ffffffff86ebeed0 R13: ffffffff8becbdc0 R14: ffff8880b5fffc80 R15: ffffffff88f78600 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdc7e787000 CR3: 00000000a1e64000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_release kernel/locking/lockdep.c:3767 [inline] lock_release+0x237/0x870 kernel/locking/lockdep.c:4017 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:406 Code: fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 35 5b 45 89 2e 4c 89 e0 5d 41 5c 41 5d <41> 5e 41 5f c3 4c 89 fe 4c 89 e7 e8 4e e6 ff ff 85 c0 0f 84 d3