EXT4-fs (loop1): re-mounted. Opts: (null) EXT4-fs (loop1): re-mounted. Opts: (null) new mount options do not match the existing superblock, will be ignored INFO: task syz-executor.2:26936 blocked for more than 140 seconds. Not tainted 4.19.165-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29552 26936 8149 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 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 hci_inquiry+0x6a6/0x920 net/bluetooth/hci_core.c:1310 hci_sock_ioctl+0x1a7/0x7d0 net/bluetooth/hci_sock.c:1048 sock_do_ioctl+0xcb/0x2d0 net/socket.c:950 sock_ioctl+0x2ef/0x5d0 net/socket.c:1074 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e219 Code: 5c 24 08 4c 89 54 24 10 44 89 64 24 18 44 89 44 24 1c 4c 89 4c 24 20 48 8b 84 24 80 00 00 00 48 8d 94 24 80 00 00 00 ff d0 80 <7c> 24 28 00 75 22 48 8b 9c 24 a8 00 00 00 48 8b 73 28 48 8b 4b 30 RSP: 002b:00007fa6522a1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000020000000 RSI: 00000000800448f0 RDI: 0000000000000004 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffedf1df19f R14: 00007fa6522a29c0 R15: 000000000119bf8c INFO: task syz-executor.2:27003 blocked for more than 140 seconds. Not tainted 4.19.165-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29032 27003 8149 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 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 hci_inquiry+0x6a6/0x920 net/bluetooth/hci_core.c:1310 hci_sock_ioctl+0x1a7/0x7d0 net/bluetooth/hci_sock.c:1048 sock_do_ioctl+0xcb/0x2d0 net/socket.c:950 sock_ioctl+0x2ef/0x5d0 net/socket.c:1074 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e219 Code: Bad RIP value. RSP: 002b:00007fa6522a1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000020000000 RSI: 00000000800448f0 RDI: 0000000000000004 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffedf1df19f R14: 00007fa6522a29c0 R15: 000000000119bf8c INFO: task syz-executor.2:27093 blocked for more than 140 seconds. Not tainted 4.19.165-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29552 27093 8149 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 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 hci_inquiry+0x6a6/0x920 net/bluetooth/hci_core.c:1310 hci_sock_ioctl+0x1a7/0x7d0 net/bluetooth/hci_sock.c:1048 sock_do_ioctl+0xcb/0x2d0 net/socket.c:950 sock_ioctl+0x2ef/0x5d0 net/socket.c:1074 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e219 Code: Bad RIP value. RSP: 002b:00007fa6522a1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000020000000 RSI: 00000000800448f0 RDI: 0000000000000004 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffedf1df19f R14: 00007fa6522a29c0 R15: 000000000119bf8c Showing all locks held in the system: 4 locks held by kworker/u4:3/126: #0: 000000006870cc93 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1824 [inline] #0: 000000006870cc93 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000000cfe4d3e (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000000cfe4d3e (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 #2: 000000007ec1a37c (&wdev->mtx){+.+.}, at: sdata_lock net/mac80211/ieee80211_i.h:990 [inline] #2: 000000007ec1a37c (&wdev->mtx){+.+.}, at: ieee80211_ibss_work+0x85/0xe10 net/mac80211/ibss.c:1675 #3: 000000000cfe4d3e (rcu_read_lock){....}, at: sdata_assert_lock net/mac80211/ieee80211_i.h:1007 [inline] #3: 000000000cfe4d3e (rcu_read_lock){....}, at: ieee80211_sta_active_ibss+0x86/0x350 net/mac80211/ibss.c:668 1 lock held by khungtaskd/1566: #0: 000000000cfe4d3e (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7834: #0: 000000001af39f9c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.3/26720: #0: 00000000546a03f0 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 1 lock held by syz-executor.2/26936: #0: 00000000546a03f0 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 1 lock held by syz-executor.2/27003: #0: 00000000546a03f0 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 1 lock held by syz-executor.2/27093: #0: 00000000546a03f0 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 1 lock held by syz-executor.2/27142: #0: 00000000546a03f0 (&hdev->req_lock){+.+.}, at: hci_req_sync+0x69/0xb0 net/bluetooth/hci_request.c:278 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1566 Comm: khungtaskd Not tainted 4.19.165-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb 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: 10 Comm: rcu_preempt Not tainted 4.19.165-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_segcblist_accelerate+0x15d/0x310 kernel/rcu/rcu_segcblist.c:401 Code: 01 48 89 c1 49 bf 00 00 00 00 00 fc ff df 48 63 d2 48 c1 e9 03 4c 8d 24 d3 4c 01 f9 4c 89 e2 48 c1 ea 03 42 80 3c 3a 00 75 69 <49> 8d 7c 24 20 4c 63 f5 48 89 fa 4e 89 6c f3 08 48 c1 ea 03 42 80 RSP: 0018:ffff8880b5a77ca8 EFLAGS: 00000046 RAX: ffff8880ba02be58 RBX: ffff8880ba02be38 RCX: ffffed10174057cb RDX: 1ffff110174057c9 RSI: 0000000000025c04 RDI: ffff8880ba02be68 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880ba02be48 R13: ffff8880af732a40 R14: ffff888094eddcc0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb76a890028 CR3: 00000000a188a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_accelerate_cbs+0xbf/0x520 kernel/rcu/tree.c:1750 __note_gp_changes+0x44c/0x570 kernel/rcu/tree.c:1838 rcu_gp_cleanup kernel/rcu/tree.c:2117 [inline] rcu_gp_kthread+0x152e/0x21c0 kernel/rcu/tree.c:2244 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415