Bluetooth: hci8: command 0x040f tx timeout Bluetooth: hci9: command 0x040f tx timeout Bluetooth: hci7: command 0x0419 tx timeout Bluetooth: hci8: command 0x0419 tx timeout Bluetooth: hci9: command 0x0419 tx timeout INFO: task syz-executor.3:31036 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D26736 31036 8130 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 io_schedule+0xb5/0x120 kernel/sched/core.c:5181 bit_wait_io+0x12/0x90 kernel/sched/wait_bit.c:207 __wait_on_bit_lock+0xb5/0x170 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xd2/0x100 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x52/0x60 fs/buffer.c:65 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x2a6/0x320 fs/buffer.c:3178 __ext4_handle_dirty_metadata+0x234/0x590 fs/ext4/ext4_jbd2.c:300 ext4_finish_convert_inline_dir fs/ext4/inline.c:1173 [inline] ext4_convert_inline_data_nolock+0x967/0xd10 fs/ext4/inline.c:1249 ext4_try_add_inline_entry+0x338/0x570 fs/ext4/inline.c:1322 ext4_add_entry+0x33c/0xbb0 fs/ext4/namei.c:2117 ext4_add_nondir fs/ext4/namei.c:2483 [inline] ext4_create+0x338/0x5f0 fs/ext4/namei.c:2525 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f42918aa0c9 Code: Bad RIP value. RSP: 002b:00007f4287ada168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f42919ca120 RCX: 00007f42918aa0c9 RDX: 000000000000275a RSI: 0000000020000180 RDI: ffffffffffffff9c RBP: 00007f4291905ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffedc385d2f R14: 00007f4287ada300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1569: #0: 00000000f621f193 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 3 locks held by kworker/u4:7/9378: #0: 0000000065837034 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000af27be33 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 0000000088672bbd (&type->s_umount_key#45){.+.+}, at: trylock_super+0x1d/0x100 fs/super.c:412 3 locks held by syz-executor.3/31036: #0: 0000000004f4f710 (sb_writers#3){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000004f4f710 (sb_writers#3){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 00000000cc467192 (&type->i_mutex_dir_key#3){++++}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000cc467192 (&type->i_mutex_dir_key#3){++++}, at: do_last fs/namei.c:3324 [inline] #1: 00000000cc467192 (&type->i_mutex_dir_key#3){++++}, at: path_openat+0x1071/0x2df0 fs/namei.c:3537 #2: 0000000044d9f5ab (&ei->xattr_sem){++++}, at: ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #2: 0000000044d9f5ab (&ei->xattr_sem){++++}, at: ext4_try_add_inline_entry+0xfc/0x570 fs/ext4/inline.c:1280 1 lock held by syz-executor.3/32744: #0: 000000005b798e80 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478 1 lock held by syz-executor.1/335: #0: 000000005b798e80 (&bdev->bd_mutex){+.+.}, at: iterate_bdevs+0xc4/0x290 fs/block_dev.c:2200 2 locks held by syz-executor.4/330: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.4/342: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.4/360: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.4/445: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 1 lock held by syz-executor.3/538: #0: 000000005b798e80 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478 2 locks held by syz-executor.4/1314: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.4/1315: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.4/1316: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.4/1317: #0: 00000000ca5b974e (&type->s_umount_key#38){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000044eae4b9 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1569 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 460 Comm: kworker/u4:11 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ae/0x3c0 kernel/locking/lockdep.c:3911 Code: 8d bb 84 08 00 00 48 83 c4 20 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d6 01 00 00 <48> c7 c0 88 82 f1 89 48 ba 00 00 00 00 00 fc ff df c7 83 84 08 00 RSP: 0018:ffff88808f0afc58 EFLAGS: 00000046 RAX: 0000000000000007 RBX: ffff8880442ce540 RCX: f29eea6e1ff5d35b RDX: 0000000000000000 RSI: 00000000ea9a094e RDI: ffff8880442cedc4 RBP: ffffffff89f85fa0 R08: 000000001e758529 R09: 0000000000000002 R10: ffff8880442cee18 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff5c3ebf000 CR3: 00000000a138c000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:419 [inline] batadv_nc_worker+0x12d/0xd50 net/batman-adv/network-coding.c:730 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415