===================================== WARNING: bad unlock balance detected! 6.7.0-rc2-syzkaller-00206-gb46ae77f6787-dirty #0 Not tainted ------------------------------------- swapper/1/0 is trying to release lock (_xmit_ETHER) at: [] spin_unlock include/linux/spinlock.h:391 [inline] [] __netif_tx_unlock include/linux/netdevice.h:4441 [inline] [] __dev_queue_xmit+0x1ece/0x3950 net/core/dev.c:4354 but there are no more locks to release! other info that might help us debug this: 3 locks held by swapper/1/0: #0: ffffc900001f0c00 ((&lapb->t1timer)){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x5e0 kernel/time/timer.c:1697 #1: ffff8880274dbdc0 (&lapb->lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] #1: ffff8880274dbdc0 (&lapb->lock){+.-.}-{2:2}, at: lapb_t1timer_expiry+0x33/0xb20 net/lapb/lapb_timer.c:99 #2: ffffffff8cb25c00 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline] #2: ffffffff8cb25c00 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:799 [inline] #2: ffffffff8cb25c00 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x23e/0x3950 net/core/dev.c:4272 stack backtrace: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.7.0-rc2-syzkaller-00206-gb46ae77f6787-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_unlock_imbalance_bug+0x252/0x2c0 kernel/locking/lockdep.c:5193 lock_release+0x59d/0x9d0 kernel/locking/lockdep.c:5430 _raw_spin_unlock+0x16/0x40 include/linux/spinlock_api_smp.h:141 spin_unlock include/linux/spinlock.h:391 [inline] __netif_tx_unlock include/linux/netdevice.h:4441 [inline] __dev_queue_xmit+0x1ece/0x3950 net/core/dev.c:4354 lapb_data_transmit+0x89/0xa0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x168/0x1f0 net/lapb/lapb_out.c:149 lapb_t1timer_expiry+0x6b8/0xb20 call_timer_fn+0x17a/0x5e0 kernel/time/timer.c:1700 __run_timers+0x64f/0x860 kernel/time/timer.c:1751 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035 __do_softirq+0x2bf/0x93a kernel/softirq.c:553 __irq_exit_rcu+0xf1/0x1b0 kernel/softirq.c:427 irq_exit_rcu+0x9/0x20 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline] RIP: 0010:acpi_safe_halt+0x20/0x30 drivers/acpi/processor_idle.c:113 Code: 7f 04 eb 36 66 0f 1f 44 00 00 65 48 8b 05 68 a8 96 75 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 36 d4 97 00 f3 0f 1e fa fb f4 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 89 fa ec 48 8b 05 RSP: 0018:ffffc90000187d08 EFLAGS: 00000246 RAX: ffff88801641bb80 RBX: ffff888016b8a064 RCX: 00000000003c8e21 RDX: 0000000000000001 RSI: ffff888016b8a000 RDI: ffff888016b8a064 RBP: 0000000000038e38 R08: ffff8880b9b36c0b R09: 1ffff11017366d81 R10: dffffc0000000000 R11: ffffed1017366d82 R12: ffff888017e39000 R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8d236d60 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x10e/0x470 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0x90 drivers/cpuidle/cpuidle.c:388 do_idle+0x374/0x5c0 kernel/sched/idle.c:134 cpu_startup_entry+0x41/0x60 kernel/sched/idle.c:380 start_secondary+0xee/0xf0 arch/x86/kernel/smpboot.c:336 secondary_startup_64_no_verify+0x167/0x16b ------------[ cut here ]------------ pvqspinlock: lock 0xffff888025c150c0 has corrupted value 0x0! WARNING: CPU: 1 PID: 0 at kernel/locking/qspinlock_paravirt.h:510 __pv_queued_spin_unlock_slowpath+0x23b/0x2f0 kernel/locking/qspinlock_paravirt.h:508 Modules linked in: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.7.0-rc2-syzkaller-00206-gb46ae77f6787-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:__pv_queued_spin_unlock_slowpath+0x23b/0x2f0 kernel/locking/qspinlock_paravirt.h:508 Code: e8 0a 70 71 f7 4c 89 f0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 9a 00 00 00 41 8b 16 48 c7 c7 40 c6 aa 8a 4c 89 f6 e8 45 19 db f6 <0f> 0b eb 95 44 89 f1 80 e1 07 38 c1 0f 8c 2e ff ff ff 4c 89 f7 e8 RSP: 0018:ffffc900001f0778 EFLAGS: 00010246 RAX: 9cb7c89c3804c300 RBX: dffffc0000000000 RCX: ffff88801641bb80 RDX: 0000000000000502 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff81524a02 R09: 1ffff9200003e044 R10: dffffc0000000000 R11: fffff5200003e045 R12: 1ffff11004b82a1a R13: ffff888025c150d0 R14: ffff888025c150c0 R15: ffff888025c150c0 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020004540 CR3: 000000000c930000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_callee_save___pv_queued_spin_unlock_slowpath+0x15/0x30 .slowpath+0x9/0x1a do_raw_spin_unlock+0x13b/0x8b0 arch/x86/include/asm/paravirt.h:591 _raw_spin_unlock+0x1e/0x40 include/linux/spinlock_api_smp.h:142 spin_unlock include/linux/spinlock.h:391 [inline] __netif_tx_unlock include/linux/netdevice.h:4441 [inline] __dev_queue_xmit+0x1ece/0x3950 net/core/dev.c:4354 lapb_data_transmit+0x89/0xa0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x168/0x1f0 net/lapb/lapb_out.c:149 lapb_t1timer_expiry+0x6b8/0xb20 call_timer_fn+0x17a/0x5e0 kernel/time/timer.c:1700 __run_timers+0x64f/0x860 kernel/time/timer.c:1751 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035 __do_softirq+0x2bf/0x93a kernel/softirq.c:553 __irq_exit_rcu+0xf1/0x1b0 kernel/softirq.c:427 irq_exit_rcu+0x9/0x20 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline] RIP: 0010:acpi_safe_halt+0x20/0x30 drivers/acpi/processor_idle.c:113 Code: 7f 04 eb 36 66 0f 1f 44 00 00 65 48 8b 05 68 a8 96 75 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 36 d4 97 00 f3 0f 1e fa fb f4 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 89 fa ec 48 8b 05 RSP: 0018:ffffc90000187d08 EFLAGS: 00000246 RAX: ffff88801641bb80 RBX: ffff888016b8a064 RCX: 00000000003c8e21 RDX: 0000000000000001 RSI: ffff888016b8a000 RDI: ffff888016b8a064 RBP: 0000000000038e38 R08: ffff8880b9b36c0b R09: 1ffff11017366d81 R10: dffffc0000000000 R11: ffffed1017366d82 R12: ffff888017e39000 R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8d236d60 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x10e/0x470 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0x90 drivers/cpuidle/cpuidle.c:388 do_idle+0x374/0x5c0 kernel/sched/idle.c:134 cpu_startup_entry+0x41/0x60 kernel/sched/idle.c:380 start_secondary+0xee/0xf0 arch/x86/kernel/smpboot.c:336 secondary_startup_64_no_verify+0x167/0x16b ---------------- Code disassembly (best guess): 0: 7f 04 jg 0x6 2: eb 36 jmp 0x3a 4: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) a: 65 48 8b 05 68 a8 96 mov %gs:0x7596a868(%rip),%rax # 0x7596a87a 11: 75 12: 48 f7 00 08 00 00 00 testq $0x8,(%rax) 19: 75 10 jne 0x2b 1b: 66 90 xchg %ax,%ax 1d: 0f 00 2d 36 d4 97 00 verw 0x97d436(%rip) # 0x97d45a 24: f3 0f 1e fa endbr64 28: fb sti 29: f4 hlt * 2a: fa cli <-- trapping instruction 2b: c3 ret 2c: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 33: 00 00 00 36: 0f 1f 40 00 nopl 0x0(%rax) 3a: 89 fa mov %edi,%edx 3c: ec in (%dx),%al 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 05 .byte 0x5