Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout random: crng init done random: 7 urandom warning(s) missed due to ratelimiting INFO: task syz-executor.1:7155 blocked for more than 140 seconds. Not tainted 4.14.222-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D26256 7155 5782 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 io_schedule+0x1c/0x70 kernel/sched/core.c:5032 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:249 __wait_on_bit_lock+0xcb/0x1c0 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xbd/0xe0 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:213 [inline] __lock_buffer+0x3c/0x40 fs/buffer.c:72 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x16f/0x1d0 fs/buffer.c:3235 sync_dirty_buffer+0xe/0x10 fs/buffer.c:3261 __ext4_handle_dirty_metadata+0x134/0x4c0 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x4b7/0xb70 fs/ext4/inline.c:1246 ext4_convert_inline_data+0x296/0x3b0 fs/ext4/inline.c:2001 ext4_fallocate+0xdd/0x19f0 fs/ext4/extents.c:4968 vfs_fallocate+0x2ba/0x770 fs/open.c:319 SYSC_fallocate fs/open.c:342 [inline] SyS_fallocate+0x3f/0x60 fs/open.c:336 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465689 RSP: 002b:00007fda2940e188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465689 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004af652 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffe0 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffce42cf64f R14: 00007fda2940e300 R15: 0000000000022000 INFO: task syz-executor.0:7231 blocked for more than 140 seconds. Not tainted 4.14.222-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D26440 7231 5780 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 io_schedule+0x1c/0x70 kernel/sched/core.c:5032 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:249 __wait_on_bit_lock+0xcb/0x1c0 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xbd/0xe0 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:213 [inline] __lock_buffer+0x3c/0x40 fs/buffer.c:72 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x16f/0x1d0 fs/buffer.c:3235 sync_dirty_buffer+0xe/0x10 fs/buffer.c:3261 __ext4_handle_dirty_metadata+0x134/0x4c0 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x4b7/0xb70 fs/ext4/inline.c:1246 ext4_convert_inline_data+0x296/0x3b0 fs/ext4/inline.c:2001 ext4_fallocate+0xdd/0x19f0 fs/ext4/extents.c:4968 vfs_fallocate+0x2ba/0x770 fs/open.c:319 SYSC_fallocate fs/open.c:342 [inline] SyS_fallocate+0x3f/0x60 fs/open.c:336 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465689 RSP: 002b:00007f7378b5d188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465689 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004af652 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffe0 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffd6a6df7ef R14: 00007f7378b5d300 R15: 0000000000022000 INFO: task syz-executor.2:7258 blocked for more than 140 seconds. Not tainted 4.14.222-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D26440 7258 5784 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 io_schedule+0x1c/0x70 kernel/sched/core.c:5032 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:249 __wait_on_bit_lock+0xcb/0x1c0 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xbd/0xe0 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:213 [inline] __lock_buffer+0x3c/0x40 fs/buffer.c:72 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x16f/0x1d0 fs/buffer.c:3235 sync_dirty_buffer+0xe/0x10 fs/buffer.c:3261 __ext4_handle_dirty_metadata+0x134/0x4c0 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x4b7/0xb70 fs/ext4/inline.c:1246 ext4_convert_inline_data+0x296/0x3b0 fs/ext4/inline.c:2001 ext4_fallocate+0xdd/0x19f0 fs/ext4/extents.c:4968 vfs_fallocate+0x2ba/0x770 fs/open.c:319 SYSC_fallocate fs/open.c:342 [inline] SyS_fallocate+0x3f/0x60 fs/open.c:336 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465689 RSP: 002b:00007f8782104188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465689 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004af652 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffe0 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffdd27d5d8f R14: 00007f8782104300 R15: 0000000000022000 INFO: task syz-executor.3:7366 blocked for more than 140 seconds. Not tainted 4.14.222-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D26440 7366 5788 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 io_schedule+0x1c/0x70 kernel/sched/core.c:5032 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:249 __wait_on_bit_lock+0xcb/0x1c0 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xbd/0xe0 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:213 [inline] __lock_buffer+0x3c/0x40 fs/buffer.c:72 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x16f/0x1d0 fs/buffer.c:3235 sync_dirty_buffer+0xe/0x10 fs/buffer.c:3261 __ext4_handle_dirty_metadata+0x134/0x4c0 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x4b7/0xb70 fs/ext4/inline.c:1246 ext4_convert_inline_data+0x296/0x3b0 fs/ext4/inline.c:2001 ext4_fallocate+0xdd/0x19f0 fs/ext4/extents.c:4968 vfs_fallocate+0x2ba/0x770 fs/open.c:319 SYSC_fallocate fs/open.c:342 [inline] SyS_fallocate+0x3f/0x60 fs/open.c:336 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465689 RSP: 002b:00007fa40b9b9188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465689 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004af652 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffe0 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffc9c914e4f R14: 00007fa40b9b9300 R15: 0000000000022000 INFO: task syz-executor.5:7376 blocked for more than 140 seconds. Not tainted 4.14.222-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D26440 7376 5786 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 io_schedule+0x1c/0x70 kernel/sched/core.c:5032 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:249 __wait_on_bit_lock+0xcb/0x1c0 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xbd/0xe0 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:213 [inline] __lock_buffer+0x3c/0x40 fs/buffer.c:72 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x16f/0x1d0 fs/buffer.c:3235 sync_dirty_buffer+0xe/0x10 fs/buffer.c:3261 __ext4_handle_dirty_metadata+0x134/0x4c0 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x4b7/0xb70 fs/ext4/inline.c:1246 ext4_convert_inline_data+0x296/0x3b0 fs/ext4/inline.c:2001 ext4_fallocate+0xdd/0x19f0 fs/ext4/extents.c:4968 vfs_fallocate+0x2ba/0x770 fs/open.c:319 SYSC_fallocate fs/open.c:342 [inline] SyS_fallocate+0x3f/0x60 fs/open.c:336 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465689 RSP: 002b:00007fc5ba929188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465689 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004af652 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffe0 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffe883b7f6f R14: 00007fc5ba929300 R15: 0000000000022000 INFO: task syz-executor.4:7395 blocked for more than 140 seconds. Not tainted 4.14.222-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D26440 7395 5787 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 io_schedule+0x1c/0x70 kernel/sched/core.c:5032 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:249 __wait_on_bit_lock+0xcb/0x1c0 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xbd/0xe0 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:213 [inline] __lock_buffer+0x3c/0x40 fs/buffer.c:72 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x16f/0x1d0 fs/buffer.c:3235 sync_dirty_buffer+0xe/0x10 fs/buffer.c:3261 __ext4_handle_dirty_metadata+0x134/0x4c0 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x4b7/0xb70 fs/ext4/inline.c:1246 ext4_convert_inline_data+0x296/0x3b0 fs/ext4/inline.c:2001 ext4_fallocate+0xdd/0x19f0 fs/ext4/extents.c:4968 vfs_fallocate+0x2ba/0x770 fs/open.c:319 SYSC_fallocate fs/open.c:342 [inline] SyS_fallocate+0x3f/0x60 fs/open.c:336 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465689 RSP: 002b:00007f33479c6188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000465689 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004af652 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffe0 R11: 0000000000000246 R12: 000000000055bf00 R13: 00007ffdc19a99cf R14: 00007f33479c6300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1068: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4548 2 locks held by syz-executor.1/7155: #0: (sb_writers#3){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] #0: (sb_writers#3){.+.+}, at: [] vfs_fallocate+0x42c/0x770 fs/open.c:318 #1: (&ei->xattr_sem){++++}, at: [] ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: (&ei->xattr_sem){++++}, at: [] ext4_convert_inline_data+0x1d3/0x3b0 fs/ext4/inline.c:1999 2 locks held by syz-executor.0/7231: #0: (sb_writers#3){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] #0: (sb_writers#3){.+.+}, at: [] vfs_fallocate+0x42c/0x770 fs/open.c:318 #1: (&ei->xattr_sem){++++}, at: [] ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: (&ei->xattr_sem){++++}, at: [] ext4_convert_inline_data+0x1d3/0x3b0 fs/ext4/inline.c:1999 2 locks held by syz-executor.2/7258: #0: (sb_writers#3){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] #0: (sb_writers#3){.+.+}, at: [] vfs_fallocate+0x42c/0x770 fs/open.c:318 #1: (&ei->xattr_sem){++++}, at: [] ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: (&ei->xattr_sem){++++}, at: [] ext4_convert_inline_data+0x1d3/0x3b0 fs/ext4/inline.c:1999 2 locks held by syz-executor.3/7366: #0: (sb_writers#3){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] #0: (sb_writers#3){.+.+}, at: [] vfs_fallocate+0x42c/0x770 fs/open.c:318 #1: (&ei->xattr_sem){++++}, at: [] ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: (&ei->xattr_sem){++++}, at: [] ext4_convert_inline_data+0x1d3/0x3b0 fs/ext4/inline.c:1999 2 locks held by syz-executor.5/7376: #0: (sb_writers#3){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] #0: (sb_writers#3){.+.+}, at: [] vfs_fallocate+0x42c/0x770 fs/open.c:318 #1: (&ei->xattr_sem){++++}, at: [] ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: (&ei->xattr_sem){++++}, at: [] ext4_convert_inline_data+0x1d3/0x3b0 fs/ext4/inline.c:1999 2 locks held by syz-executor.4/7395: #0: (sb_writers#3){.+.+}, at: [] file_start_write include/linux/fs.h:2712 [inline] #0: (sb_writers#3){.+.+}, at: [] vfs_fallocate+0x42c/0x770 fs/open.c:318 #1: (&ei->xattr_sem){++++}, at: [] ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: (&ei->xattr_sem){++++}, at: [] ext4_convert_inline_data+0x1d3/0x3b0 fs/ext4/inline.c:1999 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1068 Comm: khungtaskd Not tainted 4.14.222-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+0x14b/0x1e7 lib/dump_stack.c:58 nmi_cpu_backtrace.cold.0+0x3c/0x78 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xf5/0x120 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x51b/0xa70 kernel/hung_task.c:274 kthread+0x338/0x400 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: 6844 Comm: kworker/1:4 Not tainted 4.14.222-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient fb_flashcursor task: ffff8881deba4380 task.stack: ffff8881de788000 RIP: 0010:slow_down_io arch/x86/include/asm/paravirt.h:268 [inline] RIP: 0010:outb_p arch/x86/include/asm/io.h:309 [inline] RIP: 0010:vga_io_w include/video/vga.h:209 [inline] RIP: 0010:vga_io_rgfx include/video/vga.h:388 [inline] RIP: 0010:setmode drivers/video/fbdev/vga16fb.c:124 [inline] RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1172 [inline] RIP: 0010:vga16fb_imageblit+0x9ca/0x2380 drivers/video/fbdev/vga16fb.c:1261 RSP: 0018:ffff8881de78fa90 EFLAGS: 00000246 RAX: 0000000000000005 RBX: 0000000000000007 RCX: 1ffffffff0fe2bb2 RDX: 00000000000003ce RSI: ffff8880000a0f11 RDI: ffff8881ef7c2214 RBP: ffff8881de78fb20 R08: ffff8881ef31f158 R09: ffff8881ef7c2200 R10: 00000000ffffffff R11: ffff8881ef7c2260 R12: ffff8881ef31f110 R13: ffffffff81270ed0 R14: ffff8881ef334400 R15: ffff8881ef7c2200 FS: 0000000000000000(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9736a24000 CR3: 0000000007e6a001 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: soft_cursor+0x4f6/0xc70 drivers/video/fbdev/core/softcursor.c:74 bit_cursor+0xd71/0x1aa0 drivers/video/fbdev/core/bitblit.c:377 fb_flashcursor+0x31e/0x3c0 drivers/video/fbdev/core/fbcon.c:373 process_one_work+0x74f/0x1620 kernel/workqueue.c:2116 worker_thread+0xcc/0xee0 kernel/workqueue.c:2250 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 60 6d 5e fe 41 8b 47 14 48 8b 75 c8 88 06 0f ae e8 8a 06 b8 05 00 00 00 ba ce 03 00 00 ee <48> c7 c2 90 5d f1 87 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03