------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.1.82-syzkaller #0 Not tainted
------------------------------------------------------
kworker/0:12/3796 is trying to acquire lock:
ffffffff8d006ad8 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:139
but task is already holding lock:
ffff8880b983aa18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
_raw_spin_lock_nested+0x2d/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
raw_spin_rq_lock kernel/sched/sched.h:1354 [inline]
rq_lock kernel/sched/sched.h:1644 [inline]
task_fork_fair+0x5d/0x350 kernel/sched/fair.c:11863
sched_cgroup_fork+0x374/0x400 kernel/sched/core.c:4686
copy_process+0x2442/0x4060 kernel/fork.c:2384
kernel_clone+0x222/0x920 kernel/fork.c:2682
user_mode_thread+0x12e/0x190 kernel/fork.c:2758
rest_init+0x23/0x300 init/main.c:696
start_kernel+0x0/0x53f init/main.c:891
start_kernel+0x496/0x53f init/main.c:1138
secondary_startup_64_no_verify+0xcf/0xdb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
try_to_wake_up+0xad/0x12e0 kernel/sched/core.c:4112
up+0x6e/0x90 kernel/locking/semaphore.c:191
__up_console_sem+0x11a/0x1e0 kernel/printk/printk.c:260
__console_unlock kernel/printk/printk.c:2662 [inline]
console_unlock+0x591/0x7c0 kernel/printk/printk.c:2873
vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
dev_vprintk_emit+0x2aa/0x323 drivers/base/core.c:4902
dev_printk_emit+0xd9/0x118 drivers/base/core.c:4913
_dev_warn+0x11e/0x165 drivers/base/core.c:4969
_request_firmware+0xc4c/0x1200 drivers/base/firmware_loader/main.c:852
request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1105
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:243
console_trylock kernel/printk/printk.c:2615 [inline]
console_trylock_spinning kernel/printk/printk.c:1867 [inline]
vprintk_emit+0x1ee/0x740 kernel/printk/printk.c:2267
_printk+0xd1/0x111 kernel/printk/printk.c:2293
__report_bug lib/bug.c:195 [inline]
report_bug+0x342/0x500 lib/bug.c:219
handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:324
exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:345
asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:568
__local_bh_enable_ip+0x1b3/0x1f0
__sock_map_delete net/core/sock_map.c:426 [inline]
sock_map_delete_elem+0xcb/0x130 net/core/sock_map.c:448
bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e
bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline]
__bpf_prog_run include/linux/filter.h:600 [inline]
bpf_prog_run include/linux/filter.h:607 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2314
__traceiter_sched_switch+0x91/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2116/0x4550 kernel/sched/core.c:6555
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:433
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
seqcount_lockdep_reader_access+0x1dc/0x220 include/linux/seqlock.h:105
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:343 [inline]
gc_worker+0x325/0x1530 net/netfilter/nf_conntrack_core.c:1503
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock((console_sem).lock);
*** DEADLOCK ***
5 locks held by kworker/0:12/3796:
#0: ffff888012471938 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc900054e7d20 ((work_completion)(&(&gc_work->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:319 [inline]
#2: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:760 [inline]
#2: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: gc_worker+0x27a/0x1530 net/netfilter/nf_conntrack_core.c:1501
#3: ffff8880b983aa18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#4: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:319 [inline]
#4: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:760 [inline]
#4: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2272 [inline]
#4: ffffffff8d12a940 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 kernel/trace/bpf_trace.c:2314
stack backtrace:
CPU: 0 PID: 3796 Comm: kworker/0:12 Not tainted 6.1.82-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: events_power_efficient gc_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
check_noncircular+0x2fa/0x3b0 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain+0x1661/0x5950 kernel/locking/lockdep.c:3825
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5049
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:243
console_trylock kernel/printk/printk.c:2615 [inline]
console_trylock_spinning kernel/printk/printk.c:1867 [inline]
vprintk_emit+0x1ee/0x740 kernel/printk/printk.c:2267
_printk+0xd1/0x111 kernel/printk/printk.c:2293
__report_bug lib/bug.c:195 [inline]
report_bug+0x342/0x500 lib/bug.c:219
handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:324
exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:345
asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:568
RIP: 0010:__local_bh_enable_ip+0x1b3/0x1f0 kernel/softirq.c:376
Code: 04 25 28 00 00 00 48 3b 44 24 60 75 4a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b e9 d0 fe ff ff e8 3f 00 00 00 eb a2 <0f> 0b e9 02 ff ff ff 48 c7 c1 64 97 73 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900054e74c0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 1ffff92000a9ce9c RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff8897624b
RBP: ffffc900054e7578 R08: dffffc0000000000 R09: ffffed100ebdec46
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888059070600 R14: ffffc900054e7500 R15: 0000000000000201
__sock_map_delete net/core/sock_map.c:426 [inline]
sock_map_delete_elem+0xcb/0x130 net/core/sock_map.c:448
bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e
bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline]
__bpf_prog_run include/linux/filter.h:600 [inline]
bpf_prog_run include/linux/filter.h:607 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2314
__traceiter_sched_switch+0x91/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2116/0x4550 kernel/sched/core.c:6555
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:433
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:seqcount_lockdep_reader_access+0x1dc/0x220 include/linux/seqlock.h:105
Code: f8 4d 85 ed 75 16 e8 13 9d c7 f8 eb 15 e8 0c 9d c7 f8 e8 a7 a1 c6 01 4d 85 ed 74 ea e8 fd 9c c7 f8 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc900054e7a40 EFLAGS: 00000293
RAX: ffffffff88c2e693 RBX: 0000000000000000 RCX: ffff888053cc3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900054e7af0 R08: ffffffff88c2e669 R09: fffffbfff2092c56
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000200 R14: 0000000000000046 R15: 1ffff92000a9cf48
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:343 [inline]
gc_worker+0x325/0x1530 net/netfilter/nf_conntrack_core.c:1503
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307
WARNING: CPU: 0 PID: 3796 at kernel/softirq.c:376 __local_bh_enable_ip+0x1b3/0x1f0
Modules linked in:
CPU: 0 PID: 3796 Comm: kworker/0:12 Not tainted 6.1.82-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: events_power_efficient gc_worker
RIP: 0010:__local_bh_enable_ip+0x1b3/0x1f0 kernel/softirq.c:376
Code: 04 25 28 00 00 00 48 3b 44 24 60 75 4a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b e9 d0 fe ff ff e8 3f 00 00 00 eb a2 <0f> 0b e9 02 ff ff ff 48 c7 c1 64 97 73 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900054e74c0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 1ffff92000a9ce9c RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff8897624b
RBP: ffffc900054e7578 R08: dffffc0000000000 R09: ffffed100ebdec46
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888059070600 R14: ffffc900054e7500 R15: 0000000000000201
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31921000 CR3: 0000000058fec000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__sock_map_delete net/core/sock_map.c:426 [inline]
sock_map_delete_elem+0xcb/0x130 net/core/sock_map.c:448
bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e
bpf_dispatcher_nop_func include/linux/bpf.h:989 [inline]
__bpf_prog_run include/linux/filter.h:600 [inline]
bpf_prog_run include/linux/filter.h:607 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2273 [inline]
bpf_trace_run4+0x253/0x470 kernel/trace/bpf_trace.c:2314
__traceiter_sched_switch+0x91/0xc0 include/trace/events/sched.h:222
trace_sched_switch include/trace/events/sched.h:222 [inline]
__schedule+0x2116/0x4550 kernel/sched/core.c:6555
preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
irqentry_exit+0x53/0x80 kernel/entry/common.c:433
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:seqcount_lockdep_reader_access+0x1dc/0x220 include/linux/seqlock.h:105
Code: f8 4d 85 ed 75 16 e8 13 9d c7 f8 eb 15 e8 0c 9d c7 f8 e8 a7 a1 c6 01 4d 85 ed 74 ea e8 fd 9c c7 f8 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc900054e7a40 EFLAGS: 00000293
RAX: ffffffff88c2e693 RBX: 0000000000000000 RCX: ffff888053cc3b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900054e7af0 R08: ffffffff88c2e669 R09: fffffbfff2092c56
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000200 R14: 0000000000000046 R15: 1ffff92000a9cf48
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:343 [inline]
gc_worker+0x325/0x1530 net/netfilter/nf_conntrack_core.c:1503
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307
----------------
Code disassembly (best guess):
0: f8 clc
1: 4d 85 ed test %r13,%r13
4: 75 16 jne 0x1c
6: e8 13 9d c7 f8 call 0xf8c79d1e
b: eb 15 jmp 0x22
d: e8 0c 9d c7 f8 call 0xf8c79d1e
12: e8 a7 a1 c6 01 call 0x1c6a1be
17: 4d 85 ed test %r13,%r13
1a: 74 ea je 0x6
1c: e8 fd 9c c7 f8 call 0xf8c79d1e
21: fb sti
22: 48 c7 04 24 0e 36 e0 movq $0x45e0360e,(%rsp)
29: 45
* 2a: 4b c7 04 3c 00 00 00 movq $0x0,(%r12,%r15,1) <-- trapping instruction
31: 00
32: 66 43 c7 44 3c 09 00 movw $0x0,0x9(%r12,%r15,1)
39: 00
3a: 43 c6 44 3c 0b 00 movb $0x0,0xb(%r12,%r15,1)