Warning: Permanently added '10.128.10.20' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program [ 66.184774][ T4167] [ 66.187167][ T4167] ====================================================== [ 66.194188][ T4167] WARNING: possible circular locking dependency detected [ 66.201251][ T4167] 5.15.185-syzkaller #0 Not tainted [ 66.206447][ T4167] ------------------------------------------------------ [ 66.213463][ T4167] syz-executor181/4167 is trying to acquire lock: [ 66.219877][ T4167] ffff888026ffadb8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x710 [ 66.228785][ T4167] [ 66.228785][ T4167] but task is already holding lock: [ 66.236159][ T4167] ffff8880b912a218 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_start_range_ns+0xff/0xc20 [ 66.246168][ T4167] [ 66.246168][ T4167] which lock already depends on the new lock. [ 66.246168][ T4167] [ 66.256569][ T4167] [ 66.256569][ T4167] the existing dependency chain (in reverse order) is: [ 66.265581][ T4167] [ 66.265581][ T4167] -> #2 (hrtimer_bases.lock){-.-.}-{2:2}: [ 66.273488][ T4167] _raw_spin_lock_irqsave+0xa4/0xf0 [ 66.279233][ T4167] hrtimer_start_range_ns+0xff/0xc20 [ 66.285048][ T4167] kvfree_call_rcu+0x60d/0x7c0 [ 66.290342][ T4167] rtnl_register_internal+0x44e/0x540 [ 66.296265][ T4167] rtnl_register+0x2e/0x70 [ 66.301207][ T4167] ip_rt_init+0x2e0/0x3a0 [ 66.306063][ T4167] ip_init+0xa/0x20 [ 66.310397][ T4167] inet_init+0x28b/0x3a0 [ 66.315184][ T4167] do_one_initcall+0x1ee/0x680 [ 66.320474][ T4167] do_initcall_level+0x137/0x1f0 [ 66.325939][ T4167] do_initcalls+0x4b/0x90 [ 66.330790][ T4167] kernel_init_freeable+0x3ce/0x560 [ 66.336514][ T4167] kernel_init+0x19/0x1b0 [ 66.341463][ T4167] ret_from_fork+0x1f/0x30 [ 66.346407][ T4167] [ 66.346407][ T4167] -> #1 (krc.lock){....}-{2:2}: [ 66.353443][ T4167] _raw_spin_lock+0x2a/0x40 [ 66.358476][ T4167] kvfree_call_rcu+0x186/0x7c0 [ 66.363767][ T4167] trie_update_elem+0x86e/0xc50 [ 66.369145][ T4167] bpf_map_update_value+0x591/0x670 [ 66.374869][ T4167] generic_map_update_batch+0x525/0x7c0 [ 66.380944][ T4167] bpf_map_do_batch+0x466/0x600 [ 66.386320][ T4167] __sys_bpf+0x601/0x670 [ 66.391086][ T4167] __x64_sys_bpf+0x78/0x90 [ 66.396027][ T4167] do_syscall_64+0x4c/0xa0 [ 66.400968][ T4167] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.407390][ T4167] [ 66.407390][ T4167] -> #0 (&trie->lock){....}-{2:2}: [ 66.414688][ T4167] __lock_acquire+0x2c33/0x7c60 [ 66.420067][ T4167] lock_acquire+0x197/0x3f0 [ 66.425096][ T4167] _raw_spin_lock_irqsave+0xa4/0xf0 [ 66.430825][ T4167] trie_delete_elem+0x90/0x710 [ 66.436118][ T4167] bpf_prog_39b2490dc128e6d6+0x40/0x2ac [ 66.442185][ T4167] bpf_trace_run2+0x15b/0x2d0 [ 66.447383][ T4167] enqueue_hrtimer+0x314/0x370 [ 66.452698][ T4167] hrtimer_start_range_ns+0xa7e/0xc20 [ 66.458599][ T4167] do_nanosleep+0x1a1/0x760 [ 66.463626][ T4167] hrtimer_nanosleep+0x2f7/0x520 [ 66.469094][ T4167] __se_sys_clock_nanosleep+0x2e6/0x370 [ 66.475168][ T4167] do_syscall_64+0x4c/0xa0 [ 66.480110][ T4167] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.486531][ T4167] [ 66.486531][ T4167] other info that might help us debug this: [ 66.486531][ T4167] [ 66.496866][ T4167] Chain exists of: [ 66.496866][ T4167] &trie->lock --> krc.lock --> hrtimer_bases.lock [ 66.496866][ T4167] [ 66.509222][ T4167] Possible unsafe locking scenario: [ 66.509222][ T4167] [ 66.516694][ T4167] CPU0 CPU1 [ 66.522066][ T4167] ---- ---- [ 66.527431][ T4167] lock(hrtimer_bases.lock); [ 66.532112][ T4167] lock(krc.lock); [ 66.538551][ T4167] lock(hrtimer_bases.lock); [ 66.545763][ T4167] lock(&trie->lock); [ 66.549839][ T4167] [ 66.549839][ T4167] *** DEADLOCK *** [ 66.549839][ T4167] [ 66.557985][ T4167] 2 locks held by syz-executor181/4167: [ 66.563538][ T4167] #0: ffff8880b912a218 (hrtimer_bases.lock){-.-.}-{2:2}, at: hrtimer_start_range_ns+0xff/0xc20 [ 66.573985][ T4167] #1: ffffffff8c11bfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 66.583311][ T4167] [ 66.583311][ T4167] stack backtrace: [ 66.589220][ T4167] CPU: 1 PID: 4167 Comm: syz-executor181 Not tainted 5.15.185-syzkaller #0 [ 66.597807][ T4167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 66.607882][ T4167] Call Trace: [ 66.611168][ T4167] [ 66.614111][ T4167] dump_stack_lvl+0x168/0x230 [ 66.618791][ T4167] ? load_image+0x3b0/0x3b0 [ 66.623295][ T4167] ? show_regs_print_info+0x20/0x20 [ 66.628510][ T4167] ? print_circular_bug+0x12b/0x1a0 [ 66.633718][ T4167] check_noncircular+0x274/0x310 [ 66.638666][ T4167] ? add_chain_block+0x940/0x940 [ 66.643604][ T4167] ? lockdep_lock+0xdc/0x1e0 [ 66.648207][ T4167] ? mark_lock+0x94/0x320 [ 66.652543][ T4167] ? mark_lock+0x94/0x320 [ 66.656885][ T4167] __lock_acquire+0x2c33/0x7c60 [ 66.661758][ T4167] ? __lock_acquire+0x13ad/0x7c60 [ 66.666804][ T4167] ? __lock_acquire+0x12d9/0x7c60 [ 66.671842][ T4167] ? verify_lock_unused+0x140/0x140 [ 66.677085][ T4167] lock_acquire+0x197/0x3f0 [ 66.681594][ T4167] ? trie_delete_elem+0x90/0x710 [ 66.686544][ T4167] ? verify_lock_unused+0x140/0x140 [ 66.691836][ T4167] ? read_lock_is_recursive+0x10/0x10 [ 66.697219][ T4167] _raw_spin_lock_irqsave+0xa4/0xf0 [ 66.702436][ T4167] ? trie_delete_elem+0x90/0x710 [ 66.707385][ T4167] ? _raw_spin_lock+0x40/0x40 [ 66.712078][ T4167] trie_delete_elem+0x90/0x710 [ 66.716858][ T4167] bpf_prog_39b2490dc128e6d6+0x40/0x2ac [ 66.722410][ T4167] bpf_trace_run2+0x15b/0x2d0 [ 66.727089][ T4167] ? ktime_get_real_ts64+0x420/0x420 [ 66.732381][ T4167] ? lockdep_hardirqs_off+0x70/0x100 [ 66.737674][ T4167] ? bpf_trace_run1+0x2d0/0x2d0 [ 66.742533][ T4167] ? debug_object_activate+0x2d2/0x480 [ 66.747996][ T4167] ? _raw_spin_lock+0x40/0x40 [ 66.752686][ T4167] enqueue_hrtimer+0x314/0x370 [ 66.757458][ T4167] hrtimer_start_range_ns+0xa7e/0xc20 [ 66.762854][ T4167] do_nanosleep+0x1a1/0x760 [ 66.767376][ T4167] ? usleep_range_state+0x180/0x180 [ 66.772589][ T4167] ? __lock_acquire+0x7c60/0x7c60 [ 66.777618][ T4167] ? kernel_waitid+0x370/0x370 [ 66.782388][ T4167] hrtimer_nanosleep+0x2f7/0x520 [ 66.787339][ T4167] ? nanosleep_copyout+0x110/0x110 [ 66.792464][ T4167] ? __remove_hrtimer+0x3a0/0x3a0 [ 66.797503][ T4167] ? timespec64_add_safe+0x1d0/0x1d0 [ 66.802800][ T4167] __se_sys_clock_nanosleep+0x2e6/0x370 [ 66.808354][ T4167] ? __x64_sys_clock_nanosleep+0xa0/0xa0 [ 66.813998][ T4167] ? lockdep_hardirqs_on+0x94/0x140 [ 66.819220][ T4167] do_syscall_64+0x4c/0xa0 [ 66.823650][ T4167] ? clear_bhb_loop+0x30/0x80 [ 66.828327][ T4167] ? clear_bhb_loop+0x30/0x80 [ 66.833007][ T4167] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 66.838930][ T4167] RIP: 0033:0x7fce754077f3 [ 66.843356][ T4167] 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 8e e8 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 [ 66.862965][ T4167] RSP: 002b:00007ffe9f2fe658 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6 [ 66.871408][ T4167] RAX: ffffffffffffffda RBX: 000000000000104f RCX: 00007fce754077f3 [ 66.879385][ T4167] RDX: 00007ffe9f2fe670 RSI: 0000000000000000 RDI: 0000000000000000 executing program executing program executing program [ 66.887365][ T4167] RBP: 0000000000010253 R08: 0000000000000042 R09: 0007d0eb6ee8bb52 [ 66.895348][ T4167] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe9f2fe6ac [ 66.903328][ T4167] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 66.911319][ T4167] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program