Warning: Permanently added '10.128.0.178' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program [ 60.005751][ T4161] [ 60.008108][ T4161] ====================================================== [ 60.015117][ T4161] WARNING: possible circular locking dependency detected [ 60.022125][ T4161] 5.15.175-syzkaller #0 Not tainted [ 60.027339][ T4161] ------------------------------------------------------ [ 60.034341][ T4161] syz-executor116/4161 is trying to acquire lock: [ 60.040738][ T4161] ffff888079c819b8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 60.049623][ T4161] [ 60.049623][ T4161] but task is already holding lock: [ 60.056984][ T4161] ffff8880b8f2a218 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_start_range_ns+0x105/0xc80 [ 60.067079][ T4161] [ 60.067079][ T4161] which lock already depends on the new lock. [ 60.067079][ T4161] [ 60.077465][ T4161] [ 60.077465][ T4161] the existing dependency chain (in reverse order) is: [ 60.086463][ T4161] [ 60.086463][ T4161] -> #2 (hrtimer_bases.lock){-.-.}-{2:2}: [ 60.094356][ T4161] lock_acquire+0x1db/0x4f0 [ 60.099568][ T4161] _raw_spin_lock_irqsave+0xd1/0x120 [ 60.105385][ T4161] hrtimer_start_range_ns+0x105/0xc80 [ 60.111284][ T4161] kvfree_call_rcu+0x6a0/0x8a0 [ 60.116575][ T4161] rtnl_register_internal+0x443/0x530 [ 60.122460][ T4161] rtnl_register+0x32/0x70 [ 60.127392][ T4161] ip_rt_init+0x2e6/0x390 [ 60.132237][ T4161] ip_init+0xa/0x20 [ 60.136559][ T4161] inet_init+0x27c/0x390 [ 60.141322][ T4161] do_one_initcall+0x22b/0x7a0 [ 60.146600][ T4161] do_initcall_level+0x157/0x210 [ 60.152051][ T4161] do_initcalls+0x49/0x90 [ 60.156889][ T4161] kernel_init_freeable+0x425/0x5c0 [ 60.162595][ T4161] kernel_init+0x19/0x290 [ 60.167452][ T4161] ret_from_fork+0x1f/0x30 [ 60.172391][ T4161] [ 60.172391][ T4161] -> #1 (krc.lock){....}-{2:2}: [ 60.179507][ T4161] lock_acquire+0x1db/0x4f0 [ 60.184531][ T4161] _raw_spin_lock+0x2a/0x40 [ 60.189554][ T4161] kvfree_call_rcu+0x1b5/0x8a0 [ 60.194919][ T4161] trie_update_elem+0x8ad/0xca0 [ 60.200282][ T4161] bpf_map_update_value+0x5d7/0x6c0 [ 60.205997][ T4161] generic_map_update_batch+0x54d/0x8b0 [ 60.212061][ T4161] bpf_map_do_batch+0x4d0/0x620 [ 60.217420][ T4161] __sys_bpf+0x55c/0x670 [ 60.222177][ T4161] __x64_sys_bpf+0x78/0x90 [ 60.227107][ T4161] do_syscall_64+0x3b/0xb0 [ 60.232059][ T4161] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 60.238463][ T4161] [ 60.238463][ T4161] -> #0 (&trie->lock){....}-{2:2}: [ 60.245750][ T4161] validate_chain+0x1649/0x5930 [ 60.251120][ T4161] __lock_acquire+0x1295/0x1ff0 [ 60.256481][ T4161] lock_acquire+0x1db/0x4f0 [ 60.261513][ T4161] _raw_spin_lock_irqsave+0xd1/0x120 [ 60.267327][ T4161] trie_delete_elem+0x90/0x690 [ 60.272629][ T4161] bpf_prog_1c0c44170264bb34+0x3d/0xfb8 [ 60.278695][ T4161] bpf_trace_run2+0x19e/0x340 [ 60.283887][ T4161] enqueue_hrtimer+0x324/0x390 [ 60.289176][ T4161] hrtimer_start_range_ns+0xabe/0xc80 [ 60.295067][ T4161] do_nanosleep+0x164/0x7b0 [ 60.300086][ T4161] hrtimer_nanosleep+0x24d/0x490 [ 60.305532][ T4161] __se_sys_clock_nanosleep+0x323/0x3b0 [ 60.311592][ T4161] do_syscall_64+0x3b/0xb0 [ 60.316522][ T4161] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 60.322952][ T4161] [ 60.322952][ T4161] other info that might help us debug this: [ 60.322952][ T4161] [ 60.333161][ T4161] Chain exists of: [ 60.333161][ T4161] &trie->lock --> krc.lock --> hrtimer_bases.lock [ 60.333161][ T4161] [ 60.345490][ T4161] Possible unsafe locking scenario: [ 60.345490][ T4161] [ 60.352949][ T4161] CPU0 CPU1 [ 60.358296][ T4161] ---- ---- [ 60.363647][ T4161] lock(hrtimer_bases.lock); [ 60.368310][ T4161] lock(krc.lock); [ 60.374624][ T4161] lock(hrtimer_bases.lock); [ 60.381822][ T4161] lock(&trie->lock); [ 60.385884][ T4161] [ 60.385884][ T4161] *** DEADLOCK *** [ 60.385884][ T4161] [ 60.394013][ T4161] 2 locks held by syz-executor116/4161: [ 60.399544][ T4161] #0: ffff8880b8f2a218 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_start_range_ns+0x105/0xc80 [ 60.410063][ T4161] #1: ffffffff8cb1fd20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 60.419362][ T4161] [ 60.419362][ T4161] stack backtrace: [ 60.425247][ T4161] CPU: 1 PID: 4161 Comm: syz-executor116 Not tainted 5.15.175-syzkaller #0 [ 60.433816][ T4161] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 60.443864][ T4161] Call Trace: [ 60.447141][ T4161] [ 60.450055][ T4161] dump_stack_lvl+0x1e3/0x2d0 [ 60.454723][ T4161] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 60.460347][ T4161] ? print_circular_bug+0x12b/0x1a0 [ 60.465538][ T4161] check_noncircular+0x2f8/0x3b0 [ 60.470467][ T4161] ? add_chain_block+0x850/0x850 [ 60.475395][ T4161] ? lockdep_lock+0x11f/0x2a0 [ 60.480061][ T4161] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 60.486137][ T4161] validate_chain+0x1649/0x5930 [ 60.491003][ T4161] ? reacquire_held_locks+0x660/0x660 [ 60.496371][ T4161] ? validate_chain+0x112/0x5930 [ 60.501308][ T4161] ? validate_chain+0x112/0x5930 [ 60.506248][ T4161] ? validate_chain+0x112/0x5930 [ 60.511182][ T4161] ? look_up_lock_class+0x77/0x120 [ 60.516312][ T4161] ? register_lock_class+0x100/0x9a0 [ 60.521593][ T4161] ? is_dynamic_key+0x1f0/0x1f0 [ 60.526433][ T4161] ? mark_lock+0x98/0x340 [ 60.530779][ T4161] __lock_acquire+0x1295/0x1ff0 [ 60.535626][ T4161] lock_acquire+0x1db/0x4f0 [ 60.540126][ T4161] ? trie_delete_elem+0x90/0x690 [ 60.545067][ T4161] ? mark_lock+0x98/0x340 [ 60.549398][ T4161] ? read_lock_is_recursive+0x10/0x10 [ 60.554764][ T4161] ? __lock_acquire+0x1295/0x1ff0 [ 60.559888][ T4161] _raw_spin_lock_irqsave+0xd1/0x120 [ 60.565208][ T4161] ? trie_delete_elem+0x90/0x690 [ 60.570152][ T4161] ? _raw_spin_lock+0x40/0x40 [ 60.574837][ T4161] ? read_lock_is_recursive+0x10/0x10 [ 60.580210][ T4161] ? do_raw_spin_lock+0x14a/0x370 [ 60.585226][ T4161] ? __lock_acquire+0x1ff0/0x1ff0 [ 60.590270][ T4161] trie_delete_elem+0x90/0x690 [ 60.595030][ T4161] ? __cant_sleep+0x270/0x270 [ 60.599699][ T4161] ? do_raw_spin_unlock+0x137/0x8b0 [ 60.604896][ T4161] bpf_prog_1c0c44170264bb34+0x3d/0xfb8 [ 60.610446][ T4161] bpf_trace_run2+0x19e/0x340 [ 60.615121][ T4161] ? bpf_trace_run1+0x2f0/0x2f0 [ 60.619971][ T4161] ? debug_object_activate+0x2f4/0x4e0 [ 60.625430][ T4161] enqueue_hrtimer+0x324/0x390 [ 60.630187][ T4161] hrtimer_start_range_ns+0xabe/0xc80 [ 60.635555][ T4161] do_nanosleep+0x164/0x7b0 [ 60.640053][ T4161] ? usleep_range_state+0x1a0/0x1a0 [ 60.645240][ T4161] ? memset+0x1f/0x40 [ 60.649216][ T4161] ? __hrtimer_init+0x181/0x260 [ 60.654061][ T4161] hrtimer_nanosleep+0x24d/0x490 [ 60.658995][ T4161] ? nanosleep_copyout+0x120/0x120 [ 60.664094][ T4161] ? __remove_hrtimer+0x4b0/0x4b0 [ 60.669107][ T4161] ? timespec64_add_safe+0x220/0x220 [ 60.674390][ T4161] __se_sys_clock_nanosleep+0x323/0x3b0 [ 60.679940][ T4161] ? __x64_sys_clock_nanosleep+0xa0/0xa0 [ 60.685581][ T4161] ? syscall_enter_from_user_mode+0x2e/0x240 [ 60.691551][ T4161] ? lockdep_hardirqs_on+0x94/0x130 [ 60.696735][ T4161] ? syscall_enter_from_user_mode+0x2e/0x240 [ 60.702718][ T4161] do_syscall_64+0x3b/0xb0 [ 60.707123][ T4161] ? clear_bhb_loop+0x15/0x70 [ 60.711785][ T4161] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 60.717665][ T4161] RIP: 0033:0x7f602841a933 [ 60.722072][ T4161] Code: 00 00 00 00 0f 1f 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 4e e7 03 00 00 74 14 b8 e6 00 00 00 0f 05 d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10 [ 60.741695][ T4161] RSP: 002b:00007ffd9b6bee28 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6 [ 60.750129][ T4161] RAX: ffffffffffffffda RBX: 0000000000001046 RCX: 00007f602841a933 executing program executing program executing program [ 60.758104][ T4161] RDX: 00007ffd9b6bee40 RSI: 0000000000000000 RDI: 0000000000000000 [ 60.766068][ T4161] RBP: 000000000000ea2f R08: 00007ffd9b6ff0b0 R09: 0000000000000010 [ 60.774038][ T4161] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd9b6bee7c [ 60.782006][ T4161] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 60.789981][ T4161] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program