================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. kworker/u8:7/2447 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff8880b942a858 ( &base->lock){?.-.}-{2:2} , at: lock_timer_base+0x5d/0x220 kernel/time/timer.c:1051 {IN-HARDIRQ-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 lock_timer_base+0x5d/0x220 kernel/time/timer.c:1051 add_timer_on+0x16c/0x500 kernel/time/timer.c:1366 add_interrupt_randomness+0x29c/0x310 drivers/char/random.c:1109 handle_irq_event_percpu kernel/irq/handle.c:195 [inline] handle_irq_event+0xe4/0x1e0 kernel/irq/handle.c:210 handle_level_irq+0x25d/0x6f0 kernel/irq/chip.c:648 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xe1/0x250 arch/x86/kernel/irq.c:257 common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194 __setup_irq+0x1069/0x1e80 kernel/irq/manage.c:1818 request_threaded_irq+0x2b4/0x3e0 kernel/irq/manage.c:2202 request_irq include/linux/interrupt.h:168 [inline] setup_default_timer_irq arch/x86/kernel/time.c:70 [inline] hpet_time_init+0x5b/0x90 arch/x86/kernel/time.c:82 x86_late_time_init+0x51/0xc0 arch/x86/kernel/time.c:94 start_kernel+0x317/0x490 init/main.c:1039 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:509 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:490 common_startup_64+0x13e/0x148 irq event stamp: 1151679 hardirqs last enabled at (1151678): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (1151678): [] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194 hardirqs last disabled at (1151679): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1151679): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (1151662): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (1151662): [] batadv_nc_purge_paths+0x1d1/0x3c0 net/batman-adv/network-coding.c:471 softirqs last disabled at (1151665): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (1151665): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (1151665): [] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&base->lock ); lock(&base->lock ); *** DEADLOCK *** 6 locks held by kworker/u8:7/2447: #0: ffff88802adbb948 ((wq_completion)bat_events ){+.+.}-{0:0} , at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229 #1: ffffc900090a7d80 ((work_completion)(&(&bat_priv->nc.work)->work) ){+.+.}-{0:0} , at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230 #2: ffffffff8d7b49e0 (rcu_read_lock ){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] , at: rcu_read_lock include/linux/rcupdate.h:750 [inline] , at: batadv_nc_process_nc_paths.part.0+0xde/0x3e0 net/batman-adv/network-coding.c:687 #3: ffffc90000007cb0 ((&app->join_timer)){+.-.}-{0:0} , at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 #4: ffff8880b942a858 (&base->lock ){?.-.}-{2:2} , at: lock_timer_base+0x5d/0x220 kernel/time/timer.c:1051 #5: ffffffff8d7b49e0 (rcu_read_lock ){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] , at: rcu_read_lock include/linux/rcupdate.h:750 [inline] , at: __bpf_trace_run kernel/trace/bpf_trace.c:2380 [inline] , at: bpf_trace_run2+0xe4/0x420 kernel/trace/bpf_trace.c:2420 stack backtrace: CPU: 0 PID: 2447 Comm: kworker/u8:7 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: bat_events batadv_nc_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_usage_bug kernel/locking/lockdep.c:3971 [inline] valid_state kernel/locking/lockdep.c:4013 [inline] mark_lock_irq kernel/locking/lockdep.c:4216 [inline] mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4274 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x137/0x420 kernel/locking/lockdep.c:4359 trace_hardirqs_on+0x36/0x40 kernel/trace/trace_preemptirq.c:61 __local_bh_enable_ip+0xa4/0x120 kernel/softirq.c:387 spin_unlock_bh include/linux/spinlock.h:396 [inline] sock_hash_delete_elem+0x1f4/0x260 net/core/sock_map.c:947 bpf_prog_2c29ac5cdc6b1842+0x42/0x4a bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run2+0x154/0x420 kernel/trace/bpf_trace.c:2420 __bpf_trace_timer_start+0xc7/0x100 include/trace/events/timer.h:52 trace_timer_start include/trace/events/timer.h:52 [inline] enqueue_timer+0x2b4/0x520 kernel/time/timer.c:663 internal_add_timer kernel/time/timer.c:688 [inline] __mod_timer+0x8d7/0xdc0 kernel/time/timer.c:1183 call_timer_fn+0x1a3/0x5b0 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers+0x74b/0xab0 kernel/time/timer.c:2408 __run_timer_base kernel/time/timer.c:2419 [inline] __run_timer_base kernel/time/timer.c:2412 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2428 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438 __do_softirq+0x21b/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x1f2/0x540 kernel/locking/lockdep.c:5722 Code: c1 05 ba f3 95 7e 83 f8 01 0f 85 c8 02 00 00 9c 58 f6 c4 02 0f 85 b3 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc900090a7a38 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92001214f49 RCX: 00000000bd88f8a3 RDX: 0000000000000001 RSI: ffffffff8b0ccb80 RDI: ffffffff8b6eb4e0 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff27b7830 R10: ffffffff93dbc187 R11: 0000000000000002 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff8d7b49e0 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:298 [inline] rcu_read_lock include/linux/rcupdate.h:750 [inline] batadv_nc_process_nc_paths.part.0+0xe4/0x3e0 net/batman-adv/network-coding.c:687 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:679 [inline] batadv_nc_worker+0xdf1/0x10f0 net/batman-adv/network-coding.c:735 process_one_work+0x9ac/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c4/0x3a0 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 ------------[ cut here ]------------ raw_local_irq_restore() called with IRQs enabled WARNING: CPU: 0 PID: 2447 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x29/0x30 kernel/locking/irqflag-debug.c:10 Modules linked in: CPU: 0 PID: 2447 Comm: kworker/u8:7 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:warn_bogus_irq_restore+0x29/0x30 kernel/locking/irqflag-debug.c:10 Code: 90 f3 0f 1e fa 90 80 3d be b2 b5 04 00 74 06 90 e9 3c f8 03 00 c6 05 af b2 b5 04 01 90 48 c7 c7 00 c3 0c 8b e8 98 c2 7d f6 90 <0f> 0b 90 90 eb df 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000007b38 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8880b942a840 RCX: ffffffff8150f3e9 RDX: ffff888029d31e00 RSI: ffffffff8150f3f6 RDI: 0000000000000001 RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffc8e6 R13: 0000000000000000 R14: ffff8880b942a840 R15: 00000000ffffffff FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31223000 CR3: 000000002ba38000 CR4: 0000000000350ef0 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x74/0x80 kernel/locking/spinlock.c:194 __mod_timer+0x8f6/0xdc0 kernel/time/timer.c:1186 call_timer_fn+0x1a3/0x5b0 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers+0x74b/0xab0 kernel/time/timer.c:2408 __run_timer_base kernel/time/timer.c:2419 [inline] __run_timer_base kernel/time/timer.c:2412 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2428 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438 __do_softirq+0x21b/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x1f2/0x540 kernel/locking/lockdep.c:5722 Code: c1 05 ba f3 95 7e 83 f8 01 0f 85 c8 02 00 00 9c 58 f6 c4 02 0f 85 b3 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc900090a7a38 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92001214f49 RCX: 00000000bd88f8a3 RDX: 0000000000000001 RSI: ffffffff8b0ccb80 RDI: ffffffff8b6eb4e0 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff27b7830 ---------------- Code disassembly (best guess): 0: c1 05 ba f3 95 7e 83 roll $0x83,0x7e95f3ba(%rip) # 0x7e95f3c1 7: f8 clc 8: 01 0f add %ecx,(%rdi) a: 85 c8 test %ecx,%eax c: 02 00 add (%rax),%al e: 00 9c 58 f6 c4 02 0f add %bl,0xf02c4f6(%rax,%rbx,2) 15: 85 b3 02 00 00 48 test %esi,0x48000002(%rbx) 1b: 85 ed test %ebp,%ebp 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction 2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) 3b: 00 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24