------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
5.15.160-syzkaller #0 Not tainted
------------------------------------------------------
kworker/1:7/3604 is trying to acquire lock:
ffffffff8c7fc338 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x1c/0xa0 kernel/locking/semaphore.c:138
but task is already holding lock:
ffff8880b9b28098 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:946
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&base->lock){-.-.}-{2:2}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
lock_timer_base+0x120/0x260 kernel/time/timer.c:946
__mod_timer+0x1d6/0xeb0 kernel/time/timer.c:1019
queue_delayed_work_on+0x156/0x250 kernel/workqueue.c:1715
psi_enqueue kernel/sched/stats.h:104 [inline]
enqueue_task+0x2fe/0x3a0 kernel/sched/core.c:1973
activate_task kernel/sched/core.c:2005 [inline]
wake_up_new_task+0x515/0xb60 kernel/sched/core.c:4522
kernel_clone+0x44e/0x960 kernel/fork.c:2628
kernel_thread+0x168/0x1e0 kernel/fork.c:2656
rest_init+0x21/0x330 init/main.c:706
start_kernel+0x48c/0x540 init/main.c:1140
secondary_startup_64_no_verify+0xb1/0xbb
-> #2 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
_raw_spin_lock_nested+0x2d/0x40 kernel/locking/spinlock.c:368
raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
raw_spin_rq_lock kernel/sched/sched.h:1326 [inline]
rq_lock kernel/sched/sched.h:1621 [inline]
task_fork_fair+0x5d/0x350 kernel/sched/fair.c:11480
sched_cgroup_fork+0x2d3/0x330 kernel/sched/core.c:4466
copy_process+0x224a/0x3ef0 kernel/fork.c:2320
kernel_clone+0x210/0x960 kernel/fork.c:2604
kernel_thread+0x168/0x1e0 kernel/fork.c:2656
rest_init+0x21/0x330 init/main.c:706
start_kernel+0x48c/0x540 init/main.c:1140
secondary_startup_64_no_verify+0xb1/0xbb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__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+0xae/0x1300 kernel/sched/core.c:4030
up+0x6e/0x90 kernel/locking/semaphore.c:190
__up_console_sem+0x11a/0x1e0 kernel/printk/printk.c:256
console_unlock+0x1145/0x12b0 kernel/printk/printk.c:2760
vprintk_emit+0xbf/0x150 kernel/printk/printk.c:2274
dev_vprintk_emit+0x2aa/0x330 drivers/base/core.c:4615
dev_printk_emit+0xd9/0x120 drivers/base/core.c:4626
_dev_warn+0x11e/0x170 drivers/base/core.c:4682
firmware_fallback_sysfs+0x681/0xc90 drivers/base/firmware_loader/fallback.c:654
_request_firmware+0xbb1/0x1200 drivers/base/firmware_loader/main.c:848
request_firmware_work_func+0x126/0x270 drivers/base/firmware_loader/main.c:1097
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__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:138
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:239
console_trylock kernel/printk/printk.c:2575 [inline]
console_trylock_spinning+0x8a/0x3f0 kernel/printk/printk.c:1867
vprintk_emit+0xa6/0x150 kernel/printk/printk.c:2273
_printk+0xd1/0x120 kernel/printk/printk.c:2299
report_bug+0x1e5/0x2e0 lib/bug.c:195
handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:239
exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:259
asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:566
copy_from_user_nofault+0x15c/0x1c0
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_078a3568a35342ea+0x38/0x8ec
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
trace_timer_start include/trace/events/timer.h:52 [inline]
enqueue_timer+0x3ae/0x540 kernel/time/timer.c:586
internal_add_timer kernel/time/timer.c:611 [inline]
__mod_timer+0xa60/0xeb0 kernel/time/timer.c:1062
addrconf_mod_rs_timer+0x51/0xe0 net/ipv6/addrconf.c:328
addrconf_rs_timer+0x450/0x610 net/ipv6/addrconf.c:3967
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
__do_softirq+0x3b3/0x93a kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
console_unlock+0xe53/0x12b0 kernel/printk/printk.c:2749
vprintk_emit+0xbf/0x150 kernel/printk/printk.c:2274
_printk+0xd1/0x120 kernel/printk/printk.c:2299
addrconf_notify+0xa80/0xf30 net/ipv6/addrconf.c:3658
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
netdev_state_change+0x1a3/0x250 net/core/dev.c:1409
linkwatch_do_dev+0x10c/0x160 net/core/link_watch.c:167
__linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213
linkwatch_event+0x48/0x50 net/core/link_watch.c:252
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
other info that might help us debug this:
Chain exists of:
(console_sem).lock --> &rq->__lock --> &base->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&base->lock);
lock(&rq->__lock);
lock(&base->lock);
lock((console_sem).lock);
*** DEADLOCK ***
8 locks held by kworker/1:7/3604:
#0: ffff888011c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90004057d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8d9e7e48 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
#3: ffffffff8c7fc3a0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0xa6/0x150 kernel/printk/printk.c:2273
#4: ffffc90000dd0be0 ((&ndev->rs_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:45 [inline]
#4: ffffc90000dd0be0 ((&ndev->rs_timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x560 kernel/time/timer.c:1441
#5: ffff8880198fa578 (&ndev->lock){++--}-{2:2}, at: addrconf_rs_timer+0x361/0x610 net/ipv6/addrconf.c:3963
#6: ffff8880b9b28098 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:946
#7: ffffffff8c91fae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
stack backtrace:
CPU: 1 PID: 3604 Comm: kworker/1:7 Not tainted 5.15.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: events linkwatch_event
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__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:138
__down_trylock_console_sem+0x105/0x250 kernel/printk/printk.c:239
console_trylock kernel/printk/printk.c:2575 [inline]
console_trylock_spinning+0x8a/0x3f0 kernel/printk/printk.c:1867
vprintk_emit+0xa6/0x150 kernel/printk/printk.c:2273
_printk+0xd1/0x120 kernel/printk/printk.c:2299
report_bug+0x1e5/0x2e0 lib/bug.c:195
handle_bug+0x3d/0x70 arch/x86/kernel/traps.c:239
exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:259
asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:566
RIP: 0010:copy_from_user_nofault+0x15c/0x1c0 mm/maccess.c:226
Code: db 48 c7 c0 f2 ff ff ff 48 0f 44 c5 eb 0c e8 8b ce d5 ff 48 c7 c0 f2 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 74 ce d5 ff <0f> 0b e9 1e ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c ef fe ff
RSP: 0018:ffffc90000dd07a8 EFLAGS: 00010046
RAX: ffffffff81aa8e4c RBX: 0000000000000000 RCX: ffff88801c980000
RDX: 0000000000000104 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81aa8d5d R09: fffffbfff1f7f019
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000020000000
R13: 0000000000000008 R14: 0000000020000000 R15: ffffc90000dd0808
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_078a3568a35342ea+0x38/0x8ec
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
trace_timer_start include/trace/events/timer.h:52 [inline]
enqueue_timer+0x3ae/0x540 kernel/time/timer.c:586
internal_add_timer kernel/time/timer.c:611 [inline]
__mod_timer+0xa60/0xeb0 kernel/time/timer.c:1062
addrconf_mod_rs_timer+0x51/0xe0 net/ipv6/addrconf.c:328
addrconf_rs_timer+0x450/0x610 net/ipv6/addrconf.c:3967
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
__do_softirq+0x3b3/0x93a kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:console_unlock+0xe53/0x12b0 kernel/printk/printk.c:2749
Code: 00 48 83 7c 24 18 00 75 19 e8 79 03 1a 00 eb 18 e8 72 03 1a 00 e8 5d 94 b7 08 48 83 7c 24 18 00 74 e7 e8 60 03 1a 00 fb 31 ff <44> 89 f6 e8 b5 06 1a 00 31 db 45 85 f6 0f 95 c0 89 c1 0a 4c 24 17
RSP: 0018:ffffc90004057620 EFLAGS: 00000246
RAX: ffffffff81665960 RBX: 0000000000000000 RCX: ffff88801c980000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900040578b0 R08: ffffffff8166592b R09: fffffbfff1f7f019
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1a4b1da
R13: ffffffff8d258f08 R14: 0000000000000000 R15: dffffc0000000000
vprintk_emit+0xbf/0x150 kernel/printk/printk.c:2274
_printk+0xd1/0x120 kernel/printk/printk.c:2299
addrconf_notify+0xa80/0xf30 net/ipv6/addrconf.c:3658
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
netdev_state_change+0x1a3/0x250 net/core/dev.c:1409
linkwatch_do_dev+0x10c/0x160 net/core/link_watch.c:167
__linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213
linkwatch_event+0x48/0x50 net/core/link_watch.c:252
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
WARNING: CPU: 1 PID: 3604 at mm/maccess.c:226 copy_from_user_nofault+0x15c/0x1c0
Modules linked in:
CPU: 1 PID: 3604 Comm: kworker/1:7 Not tainted 5.15.160-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: events linkwatch_event
RIP: 0010:copy_from_user_nofault+0x15c/0x1c0 mm/maccess.c:226
Code: db 48 c7 c0 f2 ff ff ff 48 0f 44 c5 eb 0c e8 8b ce d5 ff 48 c7 c0 f2 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 74 ce d5 ff <0f> 0b e9 1e ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c ef fe ff
RSP: 0018:ffffc90000dd07a8 EFLAGS: 00010046
RAX: ffffffff81aa8e4c RBX: 0000000000000000 RCX: ffff88801c980000
RDX: 0000000000000104 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81aa8d5d R09: fffffbfff1f7f019
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000020000000
R13: 0000000000000008 R14: 0000000020000000 R15: ffffc90000dd0808
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd1a14d958 CR3: 00000000640aa000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_078a3568a35342ea+0x38/0x8ec
bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
trace_timer_start include/trace/events/timer.h:52 [inline]
enqueue_timer+0x3ae/0x540 kernel/time/timer.c:586
internal_add_timer kernel/time/timer.c:611 [inline]
__mod_timer+0xa60/0xeb0 kernel/time/timer.c:1062
addrconf_mod_rs_timer+0x51/0xe0 net/ipv6/addrconf.c:328
addrconf_rs_timer+0x450/0x610 net/ipv6/addrconf.c:3967
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
__do_softirq+0x3b3/0x93a kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:console_unlock+0xe53/0x12b0 kernel/printk/printk.c:2749
Code: 00 48 83 7c 24 18 00 75 19 e8 79 03 1a 00 eb 18 e8 72 03 1a 00 e8 5d 94 b7 08 48 83 7c 24 18 00 74 e7 e8 60 03 1a 00 fb 31 ff <44> 89 f6 e8 b5 06 1a 00 31 db 45 85 f6 0f 95 c0 89 c1 0a 4c 24 17
RSP: 0018:ffffc90004057620 EFLAGS: 00000246
RAX: ffffffff81665960 RBX: 0000000000000000 RCX: ffff88801c980000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900040578b0 R08: ffffffff8166592b R09: fffffbfff1f7f019
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1a4b1da
R13: ffffffff8d258f08 R14: 0000000000000000 R15: dffffc0000000000
vprintk_emit+0xbf/0x150 kernel/printk/printk.c:2274
_printk+0xd1/0x120 kernel/printk/printk.c:2299
addrconf_notify+0xa80/0xf30 net/ipv6/addrconf.c:3658
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
netdev_state_change+0x1a3/0x250 net/core/dev.c:1409
linkwatch_do_dev+0x10c/0x160 net/core/link_watch.c:167
__linkwatch_run_queue+0x4ca/0x7f0 net/core/link_watch.c:213
linkwatch_event+0x48/0x50 net/core/link_watch.c:252
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
----------------
Code disassembly (best guess):
0: 00 48 83 add %cl,-0x7d(%rax)
3: 7c 24 jl 0x29
5: 18 00 sbb %al,(%rax)
7: 75 19 jne 0x22
9: e8 79 03 1a 00 call 0x1a0387
e: eb 18 jmp 0x28
10: e8 72 03 1a 00 call 0x1a0387
15: e8 5d 94 b7 08 call 0x8b79477
1a: 48 83 7c 24 18 00 cmpq $0x0,0x18(%rsp)
20: 74 e7 je 0x9
22: e8 60 03 1a 00 call 0x1a0387
27: fb sti
28: 31 ff xor %edi,%edi
* 2a: 44 89 f6 mov %r14d,%esi <-- trapping instruction
2d: e8 b5 06 1a 00 call 0x1a06e7
32: 31 db xor %ebx,%ebx
34: 45 85 f6 test %r14d,%r14d
37: 0f 95 c0 setne %al
3a: 89 c1 mov %eax,%ecx
3c: 0a 4c 24 17 or 0x17(%rsp),%cl