RDX: 0000000000000000 RSI: 00000000000058ab RDI: 0000000000000004
======================================================
RBP: 00007fdb552231d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
WARNING: possible circular locking dependency detected
R13: 00007ffdf5717cbf R14: 00007fdb55223300 R15: 0000000000022000
5.10.205 #1 Not tainted
------------------------------------------------------
syz-executor.5/13907 is trying to acquire lock:
ffff88800fa80b78 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{0:0}, at: __flush_work+0xdd/0xa90 kernel/workqueue.c:3050
but task is already holding lock:
ffffffff85619628 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x4b0 net/rfkill/core.c:1232
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #5 (rfkill_global_mutex){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:968 [inline]
__mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
rfkill_register+0x36/0xa10 net/rfkill/core.c:1016
hci_register_dev+0x42e/0xc00 net/bluetooth/hci_core.c:3773
__vhci_create_device+0x2c8/0x5c0 drivers/bluetooth/hci_vhci.c:129
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
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
-> #4 (&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_cmd_work+0x15e/0x2d0 net/bluetooth/hci_core.c:5005
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
-> #3 ((work_completion)(&hdev->cmd_work)){+.+.}-{0:0}:
process_one_work+0x92d/0x14b0 kernel/workqueue.c:2258
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
-> #2 ((wq_completion)hci0#2){+.+.}-{0:0}:
flush_workqueue+0x105/0x1140 kernel/workqueue.c:2793
drain_workqueue+0x1a5/0x3c0 kernel/workqueue.c:2958
hci_dev_do_reset net/bluetooth/hci_core.c:1887 [inline]
hci_dev_reset+0x255/0x6b0 net/bluetooth/hci_core.c:1930
hci_sock_ioctl+0x3b2/0x980 net/bluetooth/hci_sock.c:1072
sock_do_ioctl+0xd3/0x300 net/socket.c:1064
sock_ioctl+0x3ea/0x700 net/socket.c:1204
vfs_ioctl fs/ioctl.c:48 [inline]
__do_sys_ioctl fs/ioctl.c:753 [inline]
__se_sys_ioctl fs/ioctl.c:739 [inline]
__x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x62/0xc7
-> #1 (&hdev->req_lock){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:968 [inline]
__mutex_lock+0x13d/0x10b0 kernel/locking/mutex.c:1109
hci_req_sync net/bluetooth/hci_request.c:275 [inline]
bg_scan_update+0x82/0x500 net/bluetooth/hci_request.c:2895
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
-> #0 ((work_completion)(&hdev->bg_scan_update)){+.+.}-{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:3729 [inline]
__lock_acquire+0x29e7/0x5b00 kernel/locking/lockdep.c:4955
lock_acquire kernel/locking/lockdep.c:5566 [inline]
lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5531
__flush_work+0x105/0xa90 kernel/workqueue.c:3053
__cancel_work_timer+0x368/0x4c0 kernel/workqueue.c:3144
hci_request_cancel_all+0x73/0x230 net/bluetooth/hci_request.c:3438
hci_dev_do_close+0xd9/0x1240 net/bluetooth/hci_core.c:1733
hci_rfkill_set_block+0x166/0x1a0 net/bluetooth/hci_core.c:2223
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
rfkill_set_block+0x1fd/0x540 net/rfkill/core.c:341
rfkill_fop_write+0x253/0x4b0 net/rfkill/core.c:1240
CPU: 1 PID: 13915 Comm: syz-executor.4 Not tainted 5.10.205 #1
vfs_write+0x29a/0xa70 fs/read_write.c:603
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
ksys_write+0x1f6/0x260 fs/read_write.c:658
Call Trace:
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x107/0x167 lib/dump_stack.c:118
entry_SYSCALL_64_after_hwframe+0x62/0xc7
fail_dump lib/fault-inject.c:52 [inline]
should_fail.cold+0x5/0xa lib/fault-inject.c:146
other info that might help us debug this:
Chain exists of:
should_failslab+0x5/0x20 mm/slab_common.c:1193
(work_completion)(&hdev->bg_scan_update)
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
-->
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
&data->open_mutex
getname_flags include/linux/audit.h:320 [inline]
getname+0x8e/0xd0 fs/namei.c:209
-->
__io_openat_prep io_uring/io_uring.c:4177 [inline]
__io_openat_prep+0x228/0x4c0 io_uring/io_uring.c:4159
rfkill_global_mutex
io_openat2_prep io_uring/io_uring.c:4218 [inline]
io_req_prep io_uring/io_uring.c:6541 [inline]
io_submit_sqe io_uring/io_uring.c:7257 [inline]
io_submit_sqes+0x25f1/0x85c0 io_uring/io_uring.c:7405
Possible unsafe locking scenario:
__do_sys_io_uring_enter+0x6b5/0x1920 io_uring/io_uring.c:10114
CPU0 CPU1
---- ----
lock(
rfkill_global_mutex
);
lock(
&data->open_mutex
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
);
entry_SYSCALL_64_after_hwframe+0x62/0xc7
lock(
RIP: 0033:0x7fdb57cadb19
rfkill_global_mutex
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:00007fdb55223188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
lock(
RAX: ffffffffffffffda RBX: 00007fdb57dc0f60 RCX: 00007fdb57cadb19
RDX: 0000000000000000 RSI: 00000000000058ab RDI: 0000000000000004
(work_completion)(&hdev->bg_scan_update)
RBP: 00007fdb552231d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
);
R13: 00007ffdf5717cbf R14: 00007fdb55223300 R15: 0000000000022000
*** DEADLOCK ***
1 lock held by syz-executor.5/13907:
#0: ffffffff85619628 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x4b0 net/rfkill/core.c:1232
stack backtrace:
CPU: 0 PID: 13907 Comm: syz-executor.5 Not tainted 5.10.205 #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:3729 [inline]
__lock_acquire+0x29e7/0x5b00 kernel/locking/lockdep.c:4955
lock_acquire kernel/locking/lockdep.c:5566 [inline]
lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5531
__flush_work+0x105/0xa90 kernel/workqueue.c:3053
__cancel_work_timer+0x368/0x4c0 kernel/workqueue.c:3144
hci_request_cancel_all+0x73/0x230 net/bluetooth/hci_request.c:3438
hci_dev_do_close+0xd9/0x1240 net/bluetooth/hci_core.c:1733
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
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
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: 0033:0x7f9181f19b19
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:00007f917f48f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f918202cf60 RCX: 00007f9181f19b19
RDX: 0000000000000008 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00007f9181f73f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0ff1388f R14: 00007f917f48f300 R15: 0000000000022000
CPU: 1 PID: 13919 Comm: syz-executor.4 Not tainted 5.10.205 #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]
slab_alloc mm/slub.c:2904 [inline]
kmem_cache_alloc+0x159/0x310 mm/slub.c:2909
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
getname_flags include/linux/audit.h:320 [inline]
getname+0x8e/0xd0 fs/namei.c:209
__io_openat_prep io_uring/io_uring.c:4177 [inline]
__io_openat_prep+0x228/0x4c0 io_uring/io_uring.c:4159
io_openat2_prep io_uring/io_uring.c:4218 [inline]
io_req_prep io_uring/io_uring.c:6541 [inline]
io_submit_sqe io_uring/io_uring.c:7257 [inline]
io_submit_sqes+0x25f1/0x85c0 io_uring/io_uring.c:7405
__do_sys_io_uring_enter+0x6b5/0x1920 io_uring/io_uring.c:10114
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x62/0xc7
RIP: 0033:0x7fdb57cadb19
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:00007fdb55223188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007fdb57dc0f60 RCX: 00007fdb57cadb19
RDX: 0000000000000000 RSI: 00000000000058ab RDI: 0000000000000004
RBP: 00007fdb552231d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffdf5717cbf R14: 00007fdb55223300 R15: 0000000000022000
pci 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
pci 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
pci 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
pci 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
----------------
Code disassembly (best guess), 1 bytes skipped:
0: ff c3 inc %ebx
2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
9: 00 00 00
c: 0f 1f 40 00 nopl 0x0(%rax)
10: 48 89 f8 mov %rdi,%rax
13: 48 89 f7 mov %rsi,%rdi
16: 48 89 d6 mov %rdx,%rsi
19: 48 89 ca mov %rcx,%rdx
1c: 4d 89 c2 mov %r8,%r10
1f: 4d 89 c8 mov %r9,%r8
22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9
27: 0f 05 syscall
* 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
2f: 73 01 jae 0x32
31: c3 retq
32: 48 c7 c1 bc ff ff ff mov $0xffffffffffffffbc,%rcx
39: f7 d8 neg %eax
3b: 64 89 01 mov %eax,%fs:(%rcx)
3e: 48 rex.W