INFO: task kworker/u5:0:45 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u5:0 state:D stack:25208 pid: 45 ppid: 2 flags:0x00004000
Workqueue: hci1 scan_update_work
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6397
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
hci_req_sync net/bluetooth/hci_request.c:209 [inline]
scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1987
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task systemd-rfkill:9327 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-rfkill state:D stack:24184 pid: 9327 ppid: 1 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
__flush_work+0x56c/0xb10 kernel/workqueue.c:3084
__cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3171
hci_request_cancel_all+0x44/0x130 net/bluetooth/hci_request.c:2869
hci_dev_close_sync+0xa1/0x10b0 net/bluetooth/hci_sync.c:3970
hci_dev_do_close+0x32/0x70 net/bluetooth/hci_core.c:553
hci_rfkill_set_block+0x19c/0x1d0 net/bluetooth/hci_core.c:935
rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:344
rfkill_fop_write+0x41a/0x500 net/rfkill/core.c:1276
vfs_write+0x28e/0xae0 fs/read_write.c:588
ksys_write+0x1ee/0x250 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f76e1a881b0
RSP: 002b:00007ffc93207dd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000562f3cea7040 RCX: 00007f76e1a881b0
RDX: 0000000000000008 RSI: 00007ffc93207e20 RDI: 0000000000000003
RBP: 00007ffc93207e18 R08: 0000562f3cead1b0 R09: 0000000000001010
R10: 0000000000080000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc93207e10 R14: 0000000000000000 R15: 0000000000000003
INFO: task syz-executor.4:9343 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211111-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:23928 pid: 9343 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6397
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
rfkill_fop_open+0x10d/0x720 net/rfkill/core.c:1148
misc_open+0x372/0x4a0 drivers/char/misc.c:141
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4c8/0x1250 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7faefbea3a04
RSP: 002b:00007fff68a38a90 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fff68a391d8 RCX: 00007faefbea3a04
RDX: 0000000000000002 RSI: 00007faefbf4a26f RDI: 00000000ffffff9c
RBP: 00007faefbf4a26f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007fff68a38c70 R14: 0000000000000000 R15: 00000000000000f8
Showing all locks held in the system:
4 locks held by kworker/u4:1/10:
#0: ffff8880157ba938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880157ba938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880157ba938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff8880157ba938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff8880157ba938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff8880157ba938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90000cf7db0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffffffff8d2f89d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb00 net/core/net_namespace.c:555
#3: ffffffff8d6f9708 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xda/0x2c0 net/rfkill/core.c:1117
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
3 locks held by kworker/u5:0/45:
#0: ffff88807777b938 ((wq_completion)hci1){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88807777b938 ((wq_completion)hci1){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88807777b938 ((wq_completion)hci1){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88807777b938 ((wq_completion)hci1){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88807777b938 ((wq_completion)hci1){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88807777b938 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc9000115fdb0 ((work_completion)(&hdev->scan_update)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff88806b3650d8 (&hdev->req_lock){+.+.}-{3:3}, at: hci_req_sync net/bluetooth/hci_request.c:209 [inline]
#2: ffff88806b3650d8 (&hdev->req_lock){+.+.}-{3:3}, at: scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1987
1 lock held by in:imklog/6235:
2 locks held by systemd-rfkill/9327:
#0: ffffffff8d6f9708 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x500 net/rfkill/core.c:1260
#1: ffff88806b3650d8 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x2a/0x70 net/bluetooth/hci_core.c:551
2 locks held by syz-executor.4/9343:
#0: ffffffff8c5e32c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
#1: ffffffff8d6f9708 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0x10d/0x720 net/rfkill/core.c:1148
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2951 Comm: systemd-journal Not tainted 5.15.0-next-20211111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:link_path_walk.part.0+0x6ef/0xd00 fs/namei.c:2281
Code: ff e8 a5 8b ff ff 31 ff 89 c3 89 c6 e8 1a 9e aa ff 84 db 0f 85 29 03 00 00 c7 04 24 f6 ff ff ff e9 5c fa ff ff e8 21 9a aa ff <49> 83 c7 01 48 bf 00 00 00 00 00 fc ff df 4c 89 f8 4c 89 fa 48 c1
RSP: 0018:ffffc90001b0fb58 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 000000000000002f RCX: 0000000000000000
RDX: ffff88807d90d7c0 RSI: ffffffff81cd32df RDI: 0000000000000003
RBP: 00000003d9bf532a R08: 0000000000000000 R09: 000000000000002f
R10: ffffffff81cd316d R11: 0000000000000000 R12: ffffc90001b0fd1c
R13: e2f55236f51925a6 R14: ffffc90001b0fce0 R15: ffff888032c84424
FS: 00007f7796d458c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7794185000 CR3: 000000007d950000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
link_path_walk fs/namei.c:2221 [inline]
path_lookupat+0xc8/0x860 fs/namei.c:2448
filename_lookup+0x1c6/0x590 fs/namei.c:2478
user_path_at_empty+0x42/0x60 fs/namei.c:2801
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x127/0x850 fs/open.c:421
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f77960009c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd5a066f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffd5a069e40 RCX: 00007f77960009c7
RDX: 00007f7796a71a00 RSI: 0000000000000000 RDI: 0000558205dfb9a3
RBP: 00007ffd5a066f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffd5a069e40 R15: 00007ffd5a067450
----------------
Code disassembly (best guess), 1 bytes skipped:
0: e8 a5 8b ff ff callq 0xffff8baa
5: 31 ff xor %edi,%edi
7: 89 c3 mov %eax,%ebx
9: 89 c6 mov %eax,%esi
b: e8 1a 9e aa ff callq 0xffaa9e2a
10: 84 db test %bl,%bl
12: 0f 85 29 03 00 00 jne 0x341
18: c7 04 24 f6 ff ff ff movl $0xfffffff6,(%rsp)
1f: e9 5c fa ff ff jmpq 0xfffffa80
24: e8 21 9a aa ff callq 0xffaa9a4a
* 29: 49 83 c7 01 add $0x1,%r15 <-- trapping instruction
2d: 48 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%rdi
34: fc ff df
37: 4c 89 f8 mov %r15,%rax
3a: 4c 89 fa mov %r15,%rdx
3d: 48 rex.W
3e: c1 .byte 0xc1