9pnet: Insufficient options for proto=fd
9pnet: Insufficient options for proto=fd
======================================================
WARNING: possible circular locking dependency detected
5.10.200 #1 Not tainted
------------------------------------------------------
syz-executor.6/14579 is trying to acquire lock:
ffff88800e500ae8 ((work_completion)(&hdev->tx_work)){+.+.}-{0:0}, at: __flush_work+0xdd/0xa90 kernel/workqueue.c:3050

but task is already holding lock:
ffff88800e500f40 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0xef/0x1240 net/bluetooth/hci_core.c:1734

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&hdev->req_lock){+.+.}-{3:3}:
       __mutex_lock_common kernel/locking/mutex.c:968 [inline]
       __mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
       hci_dev_do_close+0xef/0x1240 net/bluetooth/hci_core.c:1734
       hci_rfkill_set_block+0x166/0x1a0 net/bluetooth/hci_core.c:2223
       rfkill_set_block+0x1fd/0x540 net/rfkill/core.c:341
       rfkill_fop_write+0x253/0x4b0 net/rfkill/core.c:1240
       vfs_write+0x29a/0xa70 fs/read_write.c:603
       ksys_write+0x1f6/0x260 fs/read_write.c:658
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
       do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
       entry_SYSCALL_64_after_hwframe+0x62/0xc7
CPU: 1 PID: 14591 Comm: syz-executor.5 Not tainted 5.10.200 #1

-> #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
 (
Call Trace:
rfkill_global_mutex
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x167 lib/dump_stack.c:118
){+.+.}-{3:3}
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
:
       __mutex_lock_common kernel/locking/mutex.c:968 [inline]
       __mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
 should_failslab+0x5/0x20 mm/slab_common.c:1193
       rfkill_register+0x36/0xa10 net/rfkill/core.c:1016
 slab_pre_alloc_hook mm/slab.h:515 [inline]
 slab_alloc_node mm/slub.c:2821 [inline]
 slab_alloc mm/slub.c:2904 [inline]
 kmem_cache_alloc+0x5b/0x310 mm/slub.c:2909
       hci_register_dev+0x42e/0xc00 net/bluetooth/hci_core.c:3773
       __vhci_create_device+0x2c8/0x5c0 drivers/bluetooth/hci_vhci.c:129
 mem_pool_alloc mm/kmemleak.c:423 [inline]
 create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578
       vhci_create_device drivers/bluetooth/hci_vhci.c:153 [inline]
       vhci_open_timeout+0x38/0x50 drivers/bluetooth/hci_vhci.c:310
       process_one_work+0x9a9/0x14b0 kernel/workqueue.c:2282
 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
 slab_post_alloc_hook mm/slab.h:534 [inline]
 slab_alloc_node mm/slub.c:2896 [inline]
 kmem_cache_alloc_node+0x169/0x330 mm/slub.c:2932
       worker_thread+0x61d/0x1310 kernel/workqueue.c:2428
 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:198
       kthread+0x38f/0x470 kernel/kthread.c:313
 alloc_skb include/linux/skbuff.h:1102 [inline]
 alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5907
       ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:299
 sock_alloc_send_pskb+0x7af/0x930 net/core/sock.c:2363

-> #1
 (
&data->open_mutex
){+.+.}-{3:3}
:
       __mutex_lock_common kernel/locking/mutex.c:968 [inline]
       __mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
       vhci_send_frame+0x63/0xa0 drivers/bluetooth/hci_vhci.c:71
       hci_send_frame+0x1b9/0x320 net/bluetooth/hci_core.c:4060
       hci_sched_acl_pkt net/bluetooth/hci_core.c:4585 [inline]
       hci_sched_acl net/bluetooth/hci_core.c:4670 [inline]
       hci_tx_work+0x10af/0x1660 net/bluetooth/hci_core.c:4741
       process_one_work+0x9a9/0x14b0 kernel/workqueue.c:2282
       worker_thread+0x61d/0x1310 kernel/workqueue.c:2428
       kthread+0x38f/0x470 kernel/kthread.c:313
       ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:299
 __ip6_append_data.isra.0+0x1c12/0x3a70 net/ipv6/ip6_output.c:1661

-> #0
 (
(work_completion)(&hdev->tx_work)
){+.+.}-{0:0}
:
       check_prev_add kernel/locking/lockdep.c:2988 [inline]
       check_prevs_add kernel/locking/lockdep.c:3113 [inline]
       validate_chain kernel/locking/lockdep.c:3728 [inline]
       __lock_acquire+0x29e7/0x5b00 kernel/locking/lockdep.c:4954
       lock_acquire kernel/locking/lockdep.c:5565 [inline]
       lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5530
 ip6_make_skb+0x2de/0x4e0 net/ipv6/ip6_output.c:2028
       __flush_work+0x105/0xa90 kernel/workqueue.c:3053
       hci_dev_do_close+0x131/0x1240 net/bluetooth/hci_core.c:1745
       hci_rfkill_set_block+0x166/0x1a0 net/bluetooth/hci_core.c:2223
       rfkill_set_block+0x1fd/0x540 net/rfkill/core.c:341
       rfkill_fop_write+0x253/0x4b0 net/rfkill/core.c:1240
       vfs_write+0x29a/0xa70 fs/read_write.c:603
       ksys_write+0x1f6/0x260 fs/read_write.c:658
 udpv6_sendmsg+0x20d0/0x2af0 net/ipv6/udp.c:1550
       do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
       entry_SYSCALL_64_after_hwframe+0x62/0xc7

other info that might help us debug this:

Chain exists of:
  
(work_completion)(&hdev->tx_work)
 --> 
rfkill_global_mutex
 --> 
&hdev->req_lock


 inet6_sendmsg+0x105/0x140 net/ipv6/af_inet6.c:651
 Possible unsafe locking scenario:

       CPU0                    CPU1
 sock_sendmsg_nosec net/socket.c:651 [inline]
 __sock_sendmsg+0xf2/0x190 net/socket.c:663
       ----                    ----
 ____sys_sendmsg+0x334/0x870 net/socket.c:2376
  lock(
&hdev->req_lock
);
                               lock(
rfkill_global_mutex
);
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2430
                               lock(
&hdev->req_lock
);
  lock(
(work_completion)(&hdev->tx_work)
);

 *** DEADLOCK ***

2 locks held by syz-executor.6/14579:
 #0: 
ffffffff85619468
 (
 __sys_sendmmsg+0x195/0x470 net/socket.c:2516
rfkill_global_mutex
){+.+.}-{3:3}
, at: rfkill_fop_write+0xff/0x4b0 net/rfkill/core.c:1232
 #1: 
ffff88800e500f40
 (
&hdev->req_lock
){+.+.}-{3:3}
, at: hci_dev_do_close+0xef/0x1240 net/bluetooth/hci_core.c:1734
 __do_sys_sendmmsg net/socket.c:2545 [inline]
 __se_sys_sendmmsg net/socket.c:2542 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2542

stack backtrace:
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x62/0xc7
RIP: 0033:0x7f6c112a0b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6c0e7f5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f6c113b4020 RCX: 00007f6c112a0b19
RDX: 0400000000000095 RSI: 0000000020004d00 RDI: 0000000000000003
RBP: 00007f6c0e7f51d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe113adbcf R14: 00007f6c0e7f5300 R15: 0000000000022000
CPU: 0 PID: 14579 Comm: syz-executor.6 Not tainted 5.10.200 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x167 lib/dump_stack.c:118
 check_noncircular+0x263/0x2e0 kernel/locking/lockdep.c:2123
 check_prev_add kernel/locking/lockdep.c:2988 [inline]
 check_prevs_add kernel/locking/lockdep.c:3113 [inline]
 validate_chain kernel/locking/lockdep.c:3728 [inline]
 __lock_acquire+0x29e7/0x5b00 kernel/locking/lockdep.c:4954
 lock_acquire kernel/locking/lockdep.c:5565 [inline]
 lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5530
 __flush_work+0x105/0xa90 kernel/workqueue.c:3053
 hci_dev_do_close+0x131/0x1240 net/bluetooth/hci_core.c:1745
 hci_rfkill_set_block+0x166/0x1a0 net/bluetooth/hci_core.c:2223
 rfkill_set_block+0x1fd/0x540 net/rfkill/core.c:341
 rfkill_fop_write+0x253/0x4b0 net/rfkill/core.c:1240
 vfs_write+0x29a/0xa70 fs/read_write.c:603
 ksys_write+0x1f6/0x260 fs/read_write.c:658
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x62/0xc7
RIP: 0033:0x7f181a142b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f18176b8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f181a255f60 RCX: 00007f181a142b19
RDX: 0000000000000008 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f181a19cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe02f816ef R14: 00007f18176b8300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 14614 Comm: syz-executor.7 Not tainted 5.10.200 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x167 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
 should_failslab+0x5/0x20 mm/slab_common.c:1193
 slab_pre_alloc_hook mm/slab.h:515 [inline]
 slab_alloc_node mm/slub.c:2821 [inline]
 slab_alloc mm/slub.c:2904 [inline]
 kmem_cache_alloc+0x5b/0x310 mm/slub.c:2909
 mem_pool_alloc mm/kmemleak.c:423 [inline]
 create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578
 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
 slab_post_alloc_hook mm/slab.h:534 [inline]
 slab_alloc_node mm/slub.c:2896 [inline]
 __kmalloc_node_track_caller+0x1a6/0x3b0 mm/slub.c:4496
 __kmalloc_reserve net/core/skbuff.c:142 [inline]
 __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:210
 alloc_skb include/linux/skbuff.h:1102 [inline]
 alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5907
 sock_alloc_send_pskb+0x7af/0x930 net/core/sock.c:2363
 __ip6_append_data.isra.0+0x1c12/0x3a70 net/ipv6/ip6_output.c:1661
 ip6_append_data+0x1e7/0x330 net/ipv6/ip6_output.c:1836
 icmp6_send+0x1257/0x1ff0 net/ipv6/icmp.c:621
 __icmpv6_send include/linux/icmpv6.h:28 [inline]
 icmpv6_send include/linux/icmpv6.h:49 [inline]
 ip6_pkt_drop+0x3ae/0x7c0 net/ipv6/route.c:4425
 dst_output include/net/dst.h:436 [inline]
 ip6_local_out+0xb4/0x1a0 net/ipv6/output_core.c:161
 ip6_send_skb+0xb7/0x350 net/ipv6/ip6_output.c:1949
 udp_v6_send_skb+0x1172/0x15b0 net/ipv6/udp.c:1256
 udpv6_sendmsg+0x2113/0x2af0 net/ipv6/udp.c:1556
 inet6_sendmsg+0x105/0x140 net/ipv6/af_inet6.c:651
 sock_sendmsg_nosec net/socket.c:651 [inline]
 __sock_sendmsg+0xf2/0x190 net/socket.c:663
 ____sys_sendmsg+0x334/0x870 net/socket.c:2376
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2430
 __sys_sendmmsg+0x195/0x470 net/socket.c:2516
 __do_sys_sendmmsg net/socket.c:2545 [inline]
 __se_sys_sendmmsg net/socket.c:2542 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2542
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x62/0xc7
RIP: 0033:0x7f3da3c2db19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3da1182188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f3da3d41020 RCX: 00007f3da3c2db19
RDX: 0400000000000095 RSI: 0000000020004d00 RDI: 0000000000000003
RBP: 00007f3da11821d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe092d1acf R14: 00007f3da1182300 R15: 0000000000022000