============================================
WARNING: possible recursive locking detected
5.15.158-syzkaller #0 Not tainted
--------------------------------------------
swapper/0/0 is trying to acquire lock:
ffff88807873ed88 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:368 [inline]
ffff88807873ed88 (&hsr->seqnr_lock){+.-.}-{2:2}, at: hsr_dev_xmit+0x13a/0x1e0 net/hsr/hsr_device.c:222
but task is already holding lock:
ffff88807e59ad88 (&hsr->seqnr_lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:368 [inline]
ffff88807e59ad88 (&hsr->seqnr_lock){+.-.}-{2:2}, at: send_hsr_supervision_frame+0x272/0xad0 net/hsr/hsr_device.c:303
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&hsr->seqnr_lock);
lock(&hsr->seqnr_lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
7 locks held by swapper/0/0:
#0: ffffc90000007be0 ((&hsr->announce_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:45 [inline]
#0: ffffc90000007be0 ((&hsr->announce_timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x560 kernel/time/timer.c:1441
#1: ffffffff8c91fae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
#2: ffff88807e59ad88 (&hsr->seqnr_lock
){+.-.}-{2:2}
, at: spin_lock_bh include/linux/spinlock.h:368 [inline]
, at: send_hsr_supervision_frame+0x272/0xad0 net/hsr/hsr_device.c:303
#3: ffffffff8c91fae0
(rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
#4: ffffffff8c91fb40 (rcu_read_lock_bh){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312
#5: ffffffff8c91fae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
#6: ffffffff8c91fb40 (rcu_read_lock_bh){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312
stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_deadlock_bug kernel/locking/lockdep.c:2946 [inline]
check_deadlock kernel/locking/lockdep.c:2989 [inline]
validate_chain+0x46d2/0x5930 kernel/locking/lockdep.c:3775
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:368 [inline]
hsr_dev_xmit+0x13a/0x1e0 net/hsr/hsr_device.c:222
__netdev_start_xmit include/linux/netdevice.h:5019 [inline]
netdev_start_xmit include/linux/netdevice.h:5033 [inline]
xmit_one net/core/dev.c:3617 [inline]
dev_hard_start_xmit+0x298/0x7a0 net/core/dev.c:3633
__dev_queue_xmit+0x1cee/0x3230 net/core/dev.c:4248
br_dev_queue_push_xmit+0x6e1/0x8a0 net/bridge/br_forward.c:53
NF_HOOK+0x36c/0x420 include/linux/netfilter.h:302
br_forward_finish+0x74/0x80 net/bridge/br_forward.c:66
NF_HOOK+0x36c/0x420 include/linux/netfilter.h:302
__br_forward+0x430/0x5f0 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0xb3/0x150 net/bridge/br_forward.c:189
br_flood+0x2e7/0x440 net/bridge/br_forward.c:231
br_dev_xmit+0xfb3/0x1520
__netdev_start_xmit include/linux/netdevice.h:5019 [inline]
netdev_start_xmit include/linux/netdevice.h:5033 [inline]
xmit_one net/core/dev.c:3617 [inline]
dev_hard_start_xmit+0x298/0x7a0 net/core/dev.c:3633
__dev_queue_xmit+0x1cee/0x3230 net/core/dev.c:4248
hsr_xmit net/hsr/hsr_forward.c:338 [inline]
hsr_forward_do net/hsr/hsr_forward.c:429 [inline]
hsr_forward_skb+0x133c/0x1b50 net/hsr/hsr_forward.c:577
send_hsr_supervision_frame+0x540/0xad0 net/hsr/hsr_device.c:326
hsr_announce+0x176/0x300 net/hsr/hsr_device.c:382
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
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:570
Code: 1d 59 f7 48 83 e3 08 0f 85 0a 01 00 00 4c 8d 74 24 20 e8 24 99 5f f7 0f 1f 44 00 00 e8 1a 19 59 f7 0f 00 2d b3 d9 bb 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 9b f1 a2 f7
RSP: 0018:ffffffff8c607b80 EFLAGS: 000002d3
RAX: ffffffff8a2743a6 RBX: 0000000000000000 RCX: ffffffff8c6bd5c0
RDX: 0000000000000000 RSI: ffffffff8a8b2980 RDI: ffffffff8ad8f600
RBP: ffffffff8c607c10 R08: ffffffff8186dcf0 R09: fffffbfff18d7ab9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff18c0f70
R13: ffff888146aa4004 R14: ffffffff8c607ba0 R15: dffffc0000000000
acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:705
cpuidle_enter_state+0x521/0xef0 drivers/cpuidle/cpuidle.c:237
cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351
call_cpuidle kernel/sched/idle.c:158 [inline]
cpuidle_idle_call kernel/sched/idle.c:239 [inline]
do_idle+0x3e4/0x670 kernel/sched/idle.c:306
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
start_kernel+0x48c/0x540 init/main.c:1140
secondary_startup_64_no_verify+0xb1/0xbb
</TASK>
----------------
Code disassembly (best guess):
0: 1d 59 f7 48 83 sbb $0x8348f759,%eax
5: e3 08 jrcxz 0xf
7: 0f 85 0a 01 00 00 jne 0x117
d: 4c 8d 74 24 20 lea 0x20(%rsp),%r14
12: e8 24 99 5f f7 call 0xf75f993b
17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1c: e8 1a 19 59 f7 call 0xf759193b
21: 0f 00 2d b3 d9 bb 00 verw 0xbbd9b3(%rip) # 0xbbd9db
28: fb sti
29: f4 hlt
* 2a: 4c 89 f3 mov %r14,%rbx <-- trapping instruction
2d: 48 c1 eb 03 shr $0x3,%rbx
31: 42 80 3c 3b 00 cmpb $0x0,(%rbx,%r15,1)
36: 74 08 je 0x40
38: 4c 89 f7 mov %r14,%rdi
3b: e8 9b f1 a2 f7 call 0xf7a2f1db