------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
6.11.0-rc4-next-20240822-syzkaller #0 Not tainted
------------------------------------------------------
syz.3.43/5513 is trying to acquire lock:
ffffffff8e815218 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
but task is already holding lock:
ffff8880b903ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:587
raw_spin_rq_lock kernel/sched/sched.h:1488 [inline]
task_rq_lock+0xc6/0x360 kernel/sched/core.c:689
cgroup_move_task+0x92/0x2d0 kernel/sched/psi.c:1161
css_set_move_task+0x72e/0x950 kernel/cgroup/cgroup.c:898
cgroup_post_fork+0x256/0x880 kernel/cgroup/cgroup.c:6690
copy_process+0x39e9/0x3d50 kernel/fork.c:2598
kernel_clone+0x226/0x8f0 kernel/fork.c:2784
user_mode_thread+0x132/0x1a0 kernel/fork.c:2862
rest_init+0x23/0x300 init/main.c:712
start_kernel+0x47f/0x500 init/main.c:1105
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
-> #1 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
try_to_wake_up+0xb0/0x1480 kernel/sched/core.c:4150
up+0x72/0x90 kernel/locking/semaphore.c:191
__up_console_sem kernel/printk/printk.c:342 [inline]
__console_unlock kernel/printk/printk.c:2828 [inline]
console_unlock+0x22f/0x4d0 kernel/printk/printk.c:3155
vprintk_emit+0x87d/0xa10 kernel/printk/printk.c:2399
_printk+0xd5/0x120 kernel/printk/printk.c:2424
batadv_check_known_mac_addr+0x2b1/0x410 net/batman-adv/hard-interface.c:526
batadv_hard_if_event+0x3a5/0x1620 net/batman-adv/hard-interface.c:998
notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2032 [inline]
call_netdevice_notifiers net/core/dev.c:2046 [inline]
dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9102
dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9116
do_setlink+0x8b6/0x41f0 net/core/rtnetlink.c:2855
__rtnl_newlink net/core/rtnetlink.c:3696 [inline]
rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3743
rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x3a8/0x500 net/socket.c:2204
__do_sys_sendto net/socket.c:2216 [inline]
__se_sys_sendto net/socket.c:2212 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2212
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 ((console_sem).lock){-.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:325
console_trylock kernel/printk/printk.c:2811 [inline]
console_trylock_spinning kernel/printk/printk.c:1985 [inline]
vprintk_emit+0x4b2/0xa10 kernel/printk/printk.c:2398
_printk+0xd5/0x120 kernel/printk/printk.c:2424
__report_bug lib/bug.c:195 [inline]
report_bug+0x346/0x500 lib/bug.c:219
handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285
exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
place_entity+0x463/0x520 kernel/sched/fair.c:5337
enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409
enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985
enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014
activate_task kernel/sched/core.c:2056 [inline]
ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665
ttwu_queue kernel/sched/core.c:3940 [inline]
try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266
hrtimer_wakeup+0x62/0x80 kernel/time/hrtimer.c:1927
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1043
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
exit_to_user_mode_loop kernel/entry/common.c:101 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
irqentry_exit_to_user_mode+0x57/0x280 kernel/entry/common.c:231
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
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 ***
2 locks held by syz.3.43/5513:
#0: ffff888027224618 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
#0: ffff888027224618 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1480 kernel/sched/core.c:4150
#1: ffff8880b903ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595
stack backtrace:
CPU: 1 UID: 0 PID: 5513 Comm: syz.3.43 Not tainted 6.11.0-rc4-next-20240822-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139
__down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:325
console_trylock kernel/printk/printk.c:2811 [inline]
console_trylock_spinning kernel/printk/printk.c:1985 [inline]
vprintk_emit+0x4b2/0xa10 kernel/printk/printk.c:2398
_printk+0xd5/0x120 kernel/printk/printk.c:2424
__report_bug lib/bug.c:195 [inline]
report_bug+0x346/0x500 lib/bug.c:219
handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285
exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621
RIP: 0010:place_entity+0x463/0x520 kernel/sched/fair.c:5337
Code: 27 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 8b 3c 24 4c 89 fe e8 77 14 00 00 48 89 04 24 e9 e0 fd ff ff 90 <0f> 0b 90 41 bd 01 00 00 00 e9 22 ff ff ff 89 d9 80 e1 07 38 c1 0f
RSP: 0000:ffffc90000a18a10 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000
RDX: 0000000000000400 RSI: ffff888027223c80 RDI: ffff888027223d00
RBP: dffffc0000000000 R08: ffff888078d00147 R09: 1ffff1100f1a0028
R10: dffffc0000000000 R11: ffffed100f1a0029 R12: 000000002e5db764
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888027223c80
enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409
enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985
enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014
activate_task kernel/sched/core.c:2056 [inline]
ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665
ttwu_queue kernel/sched/core.c:3940 [inline]
try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266
hrtimer_wakeup+0x62/0x80 kernel/time/hrtimer.c:1927
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1043
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:101 [inline]
RIP: 0010:exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
RIP: 0010:irqentry_exit_to_user_mode+0x57/0x280 kernel/entry/common.c:231
Code: f8 01 00 00 e8 ba 10 00 00 65 4c 8b 3c 25 80 d7 03 00 49 8b 1f f7 c3 0e 30 02 00 0f 84 dd 00 00 00 e8 8d 67 dc f5 fb f6 c3 08 <0f> 85 85 00 00 00 f7 c3 00 10 00 00 0f 85 8a 00 00 00 f7 c3 04 00
RSP: 0000:ffffc900049dff30 EFLAGS: 00000202
RAX: 9a7e7721427d4200 RBX: 0000000000000008 RCX: ffffffff94f95903
RDX: dffffc0000000000 RSI: ffffffff8c0ace40 RDI: ffffffff8c609f20
RBP: 0000000000000000 R08: ffffffff901c12ef R09: 1ffffffff203825d
R10: dffffc0000000000 R11: fffffbfff203825e R12: 0000000000000000
R13: 0000000000000000 R14: ffffc900049dff58 R15: ffff888029dd8000
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0033:0x7fb7dd05896b
Code: 31 c0 48 81 ce ff ff ff 3f 48 3b 34 c1 0f 84 2c 01 00 00 48 83 c0 01 48 83 f8 04 75 ec 31 f6 80 7c 24 1e 00 0f 85 7f 01 00 00 <41> 83 c7 01 45 3b 7d 04 0f 82 63 ff ff ff 80 7b 4e 00 0f 84 ea 02
RSP: 002b:00007ffdcf34a330 EFLAGS: 00000202
RAX: 000000110c2b4000 RBX: 00007fb7dde45720 RCX: 0000000000000004
RDX: ffffffff822a8d25 RSI: 0000000000002a34 RDI: 0000000000000010
RBP: 0000000000000000 R08: 00007fb7dd300000 R09: 00007fb7dd302000
R10: 00000000822a8d29 R11: 0000000000000001 R12: ffffffff822a8222
R13: 00007fb7dd316018 R14: 0000000000000008 R15: 000000000000022c
WARNING: CPU: 1 PID: 5513 at kernel/sched/fair.c:5337 place_entity+0x463/0x520 kernel/sched/fair.c:5337
Modules linked in:
CPU: 1 UID: 0 PID: 5513 Comm: syz.3.43 Not tainted 6.11.0-rc4-next-20240822-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:place_entity+0x463/0x520 kernel/sched/fair.c:5337
Code: 27 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 8b 3c 24 4c 89 fe e8 77 14 00 00 48 89 04 24 e9 e0 fd ff ff 90 <0f> 0b 90 41 bd 01 00 00 00 e9 22 ff ff ff 89 d9 80 e1 07 38 c1 0f
RSP: 0000:ffffc90000a18a10 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000
RDX: 0000000000000400 RSI: ffff888027223c80 RDI: ffff888027223d00
RBP: dffffc0000000000 R08: ffff888078d00147 R09: 1ffff1100f1a0028
R10: dffffc0000000000 R11: ffffed100f1a0029 R12: 000000002e5db764
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888027223c80
FS: 000055558911a500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558911a808 CR3: 000000002cfaa000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409
enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985
enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014
activate_task kernel/sched/core.c:2056 [inline]
ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665
ttwu_queue kernel/sched/core.c:3940 [inline]
try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266
hrtimer_wakeup+0x62/0x80 kernel/time/hrtimer.c:1927
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1043
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:101 [inline]
RIP: 0010:exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
RIP: 0010:irqentry_exit_to_user_mode+0x57/0x280 kernel/entry/common.c:231
Code: f8 01 00 00 e8 ba 10 00 00 65 4c 8b 3c 25 80 d7 03 00 49 8b 1f f7 c3 0e 30 02 00 0f 84 dd 00 00 00 e8 8d 67 dc f5 fb f6 c3 08 <0f> 85 85 00 00 00 f7 c3 00 10 00 00 0f 85 8a 00 00 00 f7 c3 04 00
RSP: 0000:ffffc900049dff30 EFLAGS: 00000202
RAX: 9a7e7721427d4200 RBX: 0000000000000008 RCX: ffffffff94f95903
RDX: dffffc0000000000 RSI: ffffffff8c0ace40 RDI: ffffffff8c609f20
RBP: 0000000000000000 R08: ffffffff901c12ef R09: 1ffffffff203825d
R10: dffffc0000000000 R11: fffffbfff203825e R12: 0000000000000000
R13: 0000000000000000 R14: ffffc900049dff58 R15: ffff888029dd8000
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0033:0x7fb7dd05896b
Code: 31 c0 48 81 ce ff ff ff 3f 48 3b 34 c1 0f 84 2c 01 00 00 48 83 c0 01 48 83 f8 04 75 ec 31 f6 80 7c 24 1e 00 0f 85 7f 01 00 00 <41> 83 c7 01 45 3b 7d 04 0f 82 63 ff ff ff 80 7b 4e 00 0f 84 ea 02
RSP: 002b:00007ffdcf34a330 EFLAGS: 00000202
RAX: 000000110c2b4000 RBX: 00007fb7dde45720 RCX: 0000000000000004
RDX: ffffffff822a8d25 RSI: 0000000000002a34 RDI: 0000000000000010
RBP: 0000000000000000 R08: 00007fb7dd300000 R09: 00007fb7dd302000
R10: 00000000822a8d29 R11: 0000000000000001 R12: ffffffff822a8222
R13: 00007fb7dd316018 R14: 0000000000000008 R15: 000000000000022c
----------------
Code disassembly (best guess):
0: f8 clc
1: 01 00 add %eax,(%rax)
3: 00 e8 add %ch,%al
5: ba 10 00 00 65 mov $0x65000010,%edx
a: 4c 8b 3c 25 80 d7 03 mov 0x3d780,%r15
11: 00
12: 49 8b 1f mov (%r15),%rbx
15: f7 c3 0e 30 02 00 test $0x2300e,%ebx
1b: 0f 84 dd 00 00 00 je 0xfe
21: e8 8d 67 dc f5 call 0xf5dc67b3
26: fb sti
27: f6 c3 08 test $0x8,%bl
* 2a: 0f 85 85 00 00 00 jne 0xb5 <-- trapping instruction
30: f7 c3 00 10 00 00 test $0x1000,%ebx
36: 0f 85 8a 00 00 00 jne 0xc6
3c: f7 .byte 0xf7
3d: c3 ret
3e: 04 00 add $0x0,%al