------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.9.0-rc2-syzkaller-00080-gc85af715cac0 #0 Not tainted
------------------------------------------------------
syz-executor.0/5857 is trying to acquire lock:
ffffffff8dabea20 (console_owner
){..-.}-{0:0}, at: console_lock_spinning_enable kernel/printk/printk.c:1873 [inline]
){..-.}-{0:0}, at: console_emit_next_record kernel/printk/printk.c:2907 [inline]
){..-.}-{0:0}, at: console_flush_all+0x4ff/0xd70 kernel/printk/printk.c:2979
but task is already holding lock:
ffff88806b03ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
raw_spin_rq_lock kernel/sched/sched.h:1385 [inline]
rq_lock kernel/sched/sched.h:1699 [inline]
task_fork_fair+0x70/0x240 kernel/sched/fair.c:12635
sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4845
copy_process+0x4106/0x9160 kernel/fork.c:2498
kernel_clone+0xfd/0x980 kernel/fork.c:2796
user_mode_thread+0xb4/0xf0 kernel/fork.c:2874
rest_init+0x23/0x2b0 init/main.c:697
start_kernel+0x3a3/0x490 init/main.c:1074
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x148
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
try_to_wake_up+0x9a/0x13e0 kernel/sched/core.c:4262
__wake_up_common+0x131/0x1e0 kernel/sched/wait.c:89
__wake_up_common_lock kernel/sched/wait.c:106 [inline]
__wake_up+0x31/0x60 kernel/sched/wait.c:127
tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x55a/0x8b0 drivers/tty/serial/8250/8250_port.c:1825
__start_tx+0x3e9/0x4a0 drivers/tty/serial/8250/8250_port.c:1534
serial8250_start_tx+0x363/0x530 drivers/tty/serial/8250/8250_port.c:1643
serial_port_runtime_resume+0x2a4/0x340 drivers/tty/serial/serial_port.c:43
__rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:394
rpm_callback+0x192/0x1d0 drivers/base/power/runtime.c:448
rpm_resume+0xd2c/0x1330 drivers/base/power/runtime.c:914
pm_runtime_work+0x10c/0x150 drivers/base/power/runtime.c:979
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
-> #2 (&tty->write_wait){-...}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:105 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:127
tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69
serial8250_tx_chars+0x55a/0x8b0 drivers/tty/serial/8250/8250_port.c:1825
__start_tx+0x3e9/0x4a0 drivers/tty/serial/8250/8250_port.c:1534
serial8250_start_tx+0x363/0x530 drivers/tty/serial/8250/8250_port.c:1643
serial_port_runtime_resume+0x2a4/0x340 drivers/tty/serial/serial_port.c:43
__rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:394
rpm_callback+0x192/0x1d0 drivers/base/power/runtime.c:448
rpm_resume+0xd2c/0x1330 drivers/base/power/runtime.c:914
pm_runtime_work+0x10c/0x150 drivers/base/power/runtime.c:979
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
-> #1 (&port_lock_key){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:619 [inline]
serial8250_console_write+0xaa6/0x1090 drivers/tty/serial/8250/8250_port.c:3355
console_emit_next_record kernel/printk/printk.c:2913 [inline]
console_flush_all+0x53f/0xd70 kernel/printk/printk.c:2979
console_unlock+0xae/0x290 kernel/printk/printk.c:3048
vprintk_emit kernel/printk/printk.c:2348 [inline]
vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2373
register_console+0xaa2/0x10a0 kernel/printk/printk.c:3569
univ8250_console_init+0x35/0x50 drivers/tty/serial/8250/8250_core.c:717
console_init+0xcc/0x680 kernel/printk/printk.c:3715
start_kernel+0x259/0x490 init/main.c:1009
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x148
-> #0 (console_owner){..-.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
console_lock_spinning_enable kernel/printk/printk.c:1873 [inline]
console_emit_next_record kernel/printk/printk.c:2907 [inline]
console_flush_all+0x514/0xd70 kernel/printk/printk.c:2979
console_unlock+0xae/0x290 kernel/printk/printk.c:3048
vprintk_emit kernel/printk/printk.c:2348 [inline]
vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2373
__report_bug lib/bug.c:195 [inline]
report_bug+0x4ac/0x580 lib/bug.c:219
handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:239
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:260
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
__local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
spin_unlock_bh include/linux/spinlock.h:396 [inline]
__sock_map_delete net/core/sock_map.c:424 [inline]
sock_map_delete_elem+0xfd/0x150 net/core/sock_map.c:446
___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997
__bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:657 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
bpf_trace_run4+0x176/0x460 kernel/trace/bpf_trace.c:2422
__bpf_trace_sched_switch+0x13e/0x190 include/trace/events/sched.h:222
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x252c/0x5d00 kernel/sched/core.c:6743
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6925
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
class_preempt_destructor include/linux/preempt.h:480 [inline]
class_preempt_destructor include/linux/preempt.h:480 [inline]
try_to_wake_up+0xc08/0x13e0 kernel/sched/core.c:4233
wake_up_process kernel/sched/core.c:4510 [inline]
wake_up_q+0x91/0x140 kernel/sched/core.c:1029
futex_wake+0x43e/0x4e0 kernel/futex/waitwake.c:199
do_futex+0x1e5/0x350 kernel/futex/syscalls.c:107
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex kernel/futex/syscalls.c:160 [inline]
__x64_sys_futex+0x1e1/0x4c0 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x72/0x7a
other info that might help us debug this:
Chain exists of:
console_owner --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock(console_owner);
*** DEADLOCK ***
4 locks held by syz-executor.0/5857:
#0: ffff88806b03ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
#1: ffffffff8dbb1560 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#1: ffffffff8dbb1560 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#1: ffffffff8dbb1560 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline]
#1: ffffffff8dbb1560 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x107/0x460 kernel/trace/bpf_trace.c:2422
#2: ffffffff8db9ee60 (console_lock){+.+.}-{0:0}, at: vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
#3: ffffffff8db9eed0 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:334 [inline]
#3: ffffffff8db9eed0 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline]
#3: ffffffff8db9eed0 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline]
#3: ffffffff8db9eed0 (console_srcu){....}-{0:0}, at: console_flush_all+0x12d/0xd70 kernel/printk/printk.c:2971
stack backtrace:
CPU: 0 PID: 5857 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller-00080-gc85af715cac0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
console_lock_spinning_enable kernel/printk/printk.c:1873 [inline]
console_emit_next_record kernel/printk/printk.c:2907 [inline]
console_flush_all+0x514/0xd70 kernel/printk/printk.c:2979
console_unlock+0xae/0x290 kernel/printk/printk.c:3048
vprintk_emit kernel/printk/printk.c:2348 [inline]
vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2373
__report_bug lib/bug.c:195 [inline]
report_bug+0x4ac/0x580 lib/bug.c:219
handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:239
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:260
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
RIP: 0010:__local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Code: 00 e8 61 6f 0b 00 e8 8c b7 42 00 fb 65 8b 05 dc 02 b2 7e 85 c0 74 52 5b 5d c3 cc cc cc cc 65 8b 05 9e b3 b0 7e 85 c0 75 9e 90 <0f> 0b 90 eb 98 e8 93 b5 42 00 eb 99 48 89 ef e8 a9 f4 19 00 eb a2
RSP: 0018:ffffc900032b75d8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000201 RCX: 1ffffffff1fc2ab3
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff88d4b4ad
RBP: ffffffff88d4b4ad R08: 0000000000000000 R09: ffffed1003d8823d
R10: ffff88801ec411eb R11: ffffffff938e6c50 R12: ffff88804c5cd280
R13: ffffffff81a80660 R14: 0000000000000000 R15: 0000000000000000
spin_unlock_bh include/linux/spinlock.h:396 [inline]
__sock_map_delete net/core/sock_map.c:424 [inline]
sock_map_delete_elem+0xfd/0x150 net/core/sock_map.c:446
___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997
__bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:657 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
bpf_trace_run4+0x176/0x460 kernel/trace/bpf_trace.c:2422
__bpf_trace_sched_switch+0x13e/0x190 include/trace/events/sched.h:222
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x252c/0x5d00 kernel/sched/core.c:6743
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6925
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
class_preempt_destructor include/linux/preempt.h:480 [inline]
class_preempt_destructor include/linux/preempt.h:480 [inline]
try_to_wake_up+0xc08/0x13e0 kernel/sched/core.c:4233
wake_up_process kernel/sched/core.c:4510 [inline]
wake_up_q+0x91/0x140 kernel/sched/core.c:1029
futex_wake+0x43e/0x4e0 kernel/futex/waitwake.c:199
do_futex+0x1e5/0x350 kernel/futex/syscalls.c:107
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex kernel/futex/syscalls.c:160 [inline]
__x64_sys_futex+0x1e1/0x4c0 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7ffbc707dde9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffbc7e4a178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ffbc71abf88 RCX: 00007ffbc707dde9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ffbc71abf8c
RBP: 00007ffbc71abf80 R08: 0000000000000001 R09: 00007ffbc7e4a6c0
R10: 0000000000000006 R11: 0000000000000246 R12: 00007ffbc71abf8c
R13: 000000000000000b R14: 00007ffc9286daa0 R15: 00007ffc9286db88
WARNING: CPU: 0 PID: 5857 at kernel/softirq.c:362 __local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Modules linked in:
CPU: 0 PID: 5857 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller-00080-gc85af715cac0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__local_bh_enable_ip+0xc3/0x120 kernel/softirq.c:362
Code: 00 e8 61 6f 0b 00 e8 8c b7 42 00 fb 65 8b 05 dc 02 b2 7e 85 c0 74 52 5b 5d c3 cc cc cc cc 65 8b 05 9e b3 b0 7e 85 c0 75 9e 90 <0f> 0b 90 eb 98 e8 93 b5 42 00 eb 99 48 89 ef e8 a9 f4 19 00 eb a2
RSP: 0018:ffffc900032b75d8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000201 RCX: 1ffffffff1fc2ab3
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff88d4b4ad
RBP: ffffffff88d4b4ad R08: 0000000000000000 R09: ffffed1003d8823d
R10: ffff88801ec411eb R11: ffffffff938e6c50 R12: ffff88804c5cd280
R13: ffffffff81a80660 R14: 0000000000000000 R15: 0000000000000000
FS: 00007ffbc7e4a6c0(0000) GS:ffff88806b000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30927000 CR3: 000000002ac74000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_unlock_bh include/linux/spinlock.h:396 [inline]
__sock_map_delete net/core/sock_map.c:424 [inline]
sock_map_delete_elem+0xfd/0x150 net/core/sock_map.c:446
___bpf_prog_run+0x3e51/0xae80 kernel/bpf/core.c:1997
__bpf_prog_run32+0xc1/0x100 kernel/bpf/core.c:2236
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:657 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
bpf_trace_run4+0x176/0x460 kernel/trace/bpf_trace.c:2422
__bpf_trace_sched_switch+0x13e/0x190 include/trace/events/sched.h:222
__traceiter_sched_switch+0x6c/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x252c/0x5d00 kernel/sched/core.c:6743
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6925
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
class_preempt_destructor include/linux/preempt.h:480 [inline]
class_preempt_destructor include/linux/preempt.h:480 [inline]
try_to_wake_up+0xc08/0x13e0 kernel/sched/core.c:4233
wake_up_process kernel/sched/core.c:4510 [inline]
wake_up_q+0x91/0x140 kernel/sched/core.c:1029
futex_wake+0x43e/0x4e0 kernel/futex/waitwake.c:199
do_futex+0x1e5/0x350 kernel/futex/syscalls.c:107
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex kernel/futex/syscalls.c:160 [inline]
__x64_sys_futex+0x1e1/0x4c0 kernel/futex/syscalls.c:160
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7ffbc707dde9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffbc7e4a178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ffbc71abf88 RCX: 00007ffbc707dde9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ffbc71abf8c
RBP: 00007ffbc71abf80 R08: 0000000000000001 R09: 00007ffbc7e4a6c0
R10: 0000000000000006 R11: 0000000000000246 R12: 00007ffbc71abf8c
R13: 000000000000000b R14: 00007ffc9286daa0 R15: 00007ffc9286db88