======================================================
WARNING: possible circular locking dependency detected
5.17.0-rc5-next-20220222-syzkaller #0 Not tainted
------------------------------------------------------
ksoftirqd/0/15 is trying to acquire lock:
ffff8880b9c395d8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x366/0x1140 kernel/workqueue.c:1474
but task is already holding lock:
ffffffff9061a530 (&port_lock_key){-.-.}-{2:2}, at: serial8250_handle_irq.part.0+0x21/0x3d0 drivers/tty/serial/8250/8250_port.c:1916
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&port_lock_key){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
serial8250_console_write+0x91a/0xb70 drivers/tty/serial/8250/8250_port.c:3359
call_console_drivers kernel/printk/printk.c:1953 [inline]
console_unlock+0x9bc/0xdd0 kernel/printk/printk.c:2775
vprintk_emit+0x1b4/0x5f0 kernel/printk/printk.c:2273
vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
_printk+0xba/0xed kernel/printk/printk.c:2294
register_console kernel/printk/printk.c:3132 [inline]
register_console+0x410/0x7c0 kernel/printk/printk.c:3013
univ8250_console_init+0x3a/0x46 drivers/tty/serial/8250/8250_core.c:679
console_init+0x3c1/0x58d kernel/printk/printk.c:3232
start_kernel+0x30b/0x4a0 init/main.c:1068
secondary_startup_64_no_verify+0xc3/0xcb
-> #1 (console_owner){....}-{0:0}:
console_lock_spinning_enable kernel/printk/printk.c:1795 [inline]
console_unlock+0x3b1/0xdd0 kernel/printk/printk.c:2772
vprintk_emit+0x1b4/0x5f0 kernel/printk/printk.c:2273
vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
_printk+0xba/0xed kernel/printk/printk.c:2294
warn_flush_attempt kernel/workqueue.c:2613 [inline]
check_flush_dependency.cold+0x18/0x4e kernel/workqueue.c:2635
start_flush_work kernel/workqueue.c:3049 [inline]
__flush_work+0x25a/0xb10 kernel/workqueue.c:3091
flush_all_cpus_locked+0x148/0x1b0 mm/slub.c:2728
flush_all mm/slub.c:2737 [inline]
__kmem_cache_shrink+0x11/0x20 mm/slub.c:4640
acpi_os_purge_cache+0x11/0x20 drivers/acpi/osl.c:1666
acpi_purge_cached_objects+0x37/0xd0 drivers/acpi/acpica/utxface.c:237
acpi_initialize_objects+0x2b/0x95 drivers/acpi/acpica/utxfinit.c:250
acpi_bus_init drivers/acpi/bus.c:1237 [inline]
acpi_init+0x1d2/0x976 drivers/acpi/bus.c:1325
do_one_initcall+0x103/0x650 init/main.c:1302
do_initcall_level init/main.c:1375 [inline]
do_initcalls init/main.c:1391 [inline]
do_basic_setup init/main.c:1410 [inline]
kernel_init_freeable+0x6b1/0x73a init/main.c:1615
kernel_init+0x1a/0x1d0 init/main.c:1504
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
-> #0 (&pool->lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3096 [inline]
check_prevs_add kernel/locking/lockdep.c:3219 [inline]
validate_chain kernel/locking/lockdep.c:3834 [inline]
__lock_acquire+0x2ac6/0x56c0 kernel/locking/lockdep.c:5060
lock_acquire kernel/locking/lockdep.c:5672 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5637
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
__queue_work+0x366/0x1140 kernel/workqueue.c:1474
queue_work_on+0xee/0x110 kernel/workqueue.c:1545
uart_handle_dcd_change+0x1e1/0x2b0 drivers/tty/serial/serial_core.c:3090
serial8250_modem_status+0x277/0x2c0 drivers/tty/serial/8250/8250_port.c:1880
serial8250_handle_irq.part.0+0xa1/0x3d0 drivers/tty/serial/8250/8250_port.c:1937
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1913 [inline]
serial8250_default_handle_irq+0xb2/0x220 drivers/tty/serial/8250/8250_port.c:1957
serial8250_interrupt+0xfd/0x200 drivers/tty/serial/8250/8250_core.c:126
__handle_irq_event_percpu+0x22b/0x880 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xa7/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:817
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0x9d/0x210 arch/x86/kernel/irq.c:250
common_interrupt+0xa4/0xc0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:629
_raw_spin_lock_irqsave+0x2/0x50 kernel/locking/spinlock.c:161
debug_object_deactivate lib/debugobjects.c:735 [inline]
debug_object_deactivate+0x101/0x300 lib/debugobjects.c:723
debug_rcu_head_unqueue kernel/rcu/rcu.h:197 [inline]
rcu_do_batch kernel/rcu/tree.c:2554 [inline]
rcu_core+0x769/0x1880 kernel/rcu/tree.c:2812
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:921 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
other info that might help us debug this:
Chain exists of:
&pool->lock --> console_owner --> &port_lock_key
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&port_lock_key);
lock(console_owner);
lock(&port_lock_key);
lock(&pool->lock);
*** DEADLOCK ***
3 locks held by ksoftirqd/0/15:
#0: ffff88807a78f9b0 (&i->lock){-.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
#0: ffff88807a78f9b0 (&i->lock){-.-.}-{2:2}, at: serial8250_interrupt+0x3a/0x200 drivers/tty/serial/8250/8250_core.c:116
#1: ffffffff9061a530 (&port_lock_key){-.-.}-{2:2}, at: serial8250_handle_irq.part.0+0x21/0x3d0 drivers/tty/serial/8250/8250_port.c:1916
#2: ffffffff8bb866a0 (rcu_read_lock){....}-{1:2}, at: __queue_work+0xd0/0x1140 kernel/workqueue.c:1437
stack backtrace:
CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 5.17.0-rc5-next-20220222-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
check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2176
check_prev_add kernel/locking/lockdep.c:3096 [inline]
check_prevs_add kernel/locking/lockdep.c:3219 [inline]
validate_chain kernel/locking/lockdep.c:3834 [inline]
__lock_acquire+0x2ac6/0x56c0 kernel/locking/lockdep.c:5060
lock_acquire kernel/locking/lockdep.c:5672 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5637
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
__queue_work+0x366/0x1140 kernel/workqueue.c:1474
queue_work_on+0xee/0x110 kernel/workqueue.c:1545
uart_handle_dcd_change+0x1e1/0x2b0 drivers/tty/serial/serial_core.c:3090
serial8250_modem_status+0x277/0x2c0 drivers/tty/serial/8250/8250_port.c:1880
serial8250_handle_irq.part.0+0xa1/0x3d0 drivers/tty/serial/8250/8250_port.c:1937
serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1913 [inline]
serial8250_default_handle_irq+0xb2/0x220 drivers/tty/serial/8250/8250_port.c:1957
serial8250_interrupt+0xfd/0x200 drivers/tty/serial/8250/8250_core.c:126
__handle_irq_event_percpu+0x22b/0x880 kernel/irq/handle.c:158
handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
handle_irq_event+0xa7/0x1e0 kernel/irq/handle.c:210
handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:817
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:231 [inline]
__common_interrupt+0x9d/0x210 arch/x86/kernel/irq.c:250
common_interrupt+0xa4/0xc0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:629
RIP: 0010:_raw_spin_lock_irqsave+0x2/0x50 kernel/locking/spinlock.c:161
Code: 18 31 d2 31 f6 e8 6e d3 0b f8 48 89 ef 58 5d e9 74 47 0c f8 e8 9f 77 2d f8 eb c9 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 54 <55> 48 89 fd 9c 41 5c fa 41 f7 c4 00 02 00 00 75 36 bf 01 00 00 00
RSP: 0018:ffffc90000147c60 EFLAGS: 00000202
RAX: 0000000000002a68 RBX: 00000000000bed40 RCX: 0000000000000000
RDX: 61c8864680b583eb RSI: ffffffff89adcbe0 RDI: ffffffff90598048
RBP: ffffffff90598040 R08: ffffffff90598048 R09: 0000000000000001
R10: ffffffff817f77e8 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffffff89adcbe0 R14: 1ffff92000028f90 R15: ffff88801c4aa450
debug_object_deactivate lib/debugobjects.c:735 [inline]
debug_object_deactivate+0x101/0x300 lib/debugobjects.c:723
debug_rcu_head_unqueue kernel/rcu/rcu.h:197 [inline]
rcu_do_batch kernel/rcu/tree.c:2554 [inline]
rcu_core+0x769/0x1880 kernel/rcu/tree.c:2812
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:921 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 18 31 sbb %dh,(%rcx)
2: d2 31 shlb %cl,(%rcx)
4: f6 e8 imul %al
6: 6e outsb %ds:(%rsi),(%dx)
7: d3 0b rorl %cl,(%rbx)
9: f8 clc
a: 48 89 ef mov %rbp,%rdi
d: 58 pop %rax
e: 5d pop %rbp
f: e9 74 47 0c f8 jmpq 0xf80c4788
14: e8 9f 77 2d f8 callq 0xf82d77b8
19: eb c9 jmp 0xffffffe4
1b: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
22: 00 00 00 00
26: 66 90 xchg %ax,%ax
28: 41 54 push %r12
* 2a: 55 push %rbp <-- trapping instruction
2b: 48 89 fd mov %rdi,%rbp
2e: 9c pushfq
2f: 41 5c pop %r12
31: fa cli
32: 41 f7 c4 00 02 00 00 test $0x200,%r12d
39: 75 36 jne 0x71
3b: bf 01 00 00 00 mov $0x1,%edi