Warning: Permanently added '10.128.1.126' (ED25519) to the list of known hosts. executing program syzkaller login: [ 59.192270][ T4170] [ 59.194651][ T4170] ====================================================== [ 59.201756][ T4170] WARNING: possible circular locking dependency detected [ 59.208755][ T4170] 5.15.177-syzkaller #0 Not tainted [ 59.213932][ T4170] ------------------------------------------------------ [ 59.220929][ T4170] syz-executor264/4170 is trying to acquire lock: [ 59.227335][ T4170] ffff8880b8f27e78 (krc.lock){....}-{2:2}, at: kvfree_call_rcu+0x1b5/0x8a0 [ 59.235951][ T4170] [ 59.235951][ T4170] but task is already holding lock: [ 59.243296][ T4170] ffff888024af89b8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 59.252169][ T4170] [ 59.252169][ T4170] which lock already depends on the new lock. [ 59.252169][ T4170] [ 59.262548][ T4170] [ 59.262548][ T4170] the existing dependency chain (in reverse order) is: [ 59.271561][ T4170] [ 59.271561][ T4170] -> #2 (&trie->lock){....}-{2:2}: [ 59.278885][ T4170] lock_acquire+0x1db/0x4f0 [ 59.283895][ T4170] _raw_spin_lock_irqsave+0xd1/0x120 [ 59.289695][ T4170] trie_delete_elem+0x90/0x690 [ 59.294964][ T4170] bpf_prog_6685fa5310c1817b+0x42/0x5e4 [ 59.301011][ T4170] bpf_trace_run2+0x19e/0x340 [ 59.306192][ T4170] enqueue_hrtimer+0x324/0x390 [ 59.311459][ T4170] hrtimer_start_range_ns+0xabe/0xc80 [ 59.317337][ T4170] do_nanosleep+0x164/0x7b0 [ 59.322343][ T4170] hrtimer_nanosleep+0x24d/0x490 [ 59.327784][ T4170] __se_sys_clock_nanosleep+0x323/0x3b0 [ 59.333835][ T4170] do_syscall_64+0x3b/0xb0 [ 59.338765][ T4170] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 59.345164][ T4170] [ 59.345164][ T4170] -> #1 (hrtimer_bases.lock){-.-.}-{2:2}: [ 59.353049][ T4170] lock_acquire+0x1db/0x4f0 [ 59.358057][ T4170] _raw_spin_lock_irqsave+0xd1/0x120 [ 59.363850][ T4170] hrtimer_start_range_ns+0x105/0xc80 [ 59.369729][ T4170] kvfree_call_rcu+0x6a0/0x8a0 [ 59.374997][ T4170] rtnl_register_internal+0x443/0x530 [ 59.380876][ T4170] rtnl_register+0x32/0x70 [ 59.385796][ T4170] ip_rt_init+0x2e6/0x390 [ 59.390645][ T4170] ip_init+0xa/0x20 [ 59.394961][ T4170] inet_init+0x27c/0x390 [ 59.399718][ T4170] do_one_initcall+0x22b/0x7a0 [ 59.405007][ T4170] do_initcall_level+0x157/0x210 [ 59.410469][ T4170] do_initcalls+0x49/0x90 [ 59.415306][ T4170] kernel_init_freeable+0x425/0x5c0 [ 59.421029][ T4170] kernel_init+0x19/0x290 [ 59.425891][ T4170] ret_from_fork+0x1f/0x30 [ 59.430820][ T4170] [ 59.430820][ T4170] -> #0 (krc.lock){....}-{2:2}: [ 59.437867][ T4170] validate_chain+0x1649/0x5930 [ 59.443227][ T4170] __lock_acquire+0x1295/0x1ff0 [ 59.448580][ T4170] lock_acquire+0x1db/0x4f0 [ 59.453605][ T4170] _raw_spin_lock+0x2a/0x40 [ 59.458617][ T4170] kvfree_call_rcu+0x1b5/0x8a0 [ 59.463887][ T4170] trie_delete_elem+0x520/0x690 [ 59.469247][ T4170] bpf_prog_8c8ab8634bca3061+0x3a/0x7d0 [ 59.475303][ T4170] bpf_trace_run3+0x1d1/0x380 [ 59.480504][ T4170] __bpf_trace_kmem_cache_free+0x99/0xc0 [ 59.486657][ T4170] kmem_cache_free+0x1ce/0x1f0 [ 59.491930][ T4170] do_sys_openat2+0x202/0x4f0 [ 59.497113][ T4170] __x64_sys_openat+0x243/0x290 [ 59.502483][ T4170] do_syscall_64+0x3b/0xb0 [ 59.507501][ T4170] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 59.513906][ T4170] [ 59.513906][ T4170] other info that might help us debug this: [ 59.513906][ T4170] [ 59.524114][ T4170] Chain exists of: [ 59.524114][ T4170] krc.lock --> hrtimer_bases.lock --> &trie->lock [ 59.524114][ T4170] [ 59.536434][ T4170] Possible unsafe locking scenario: [ 59.536434][ T4170] [ 59.543910][ T4170] CPU0 CPU1 [ 59.549269][ T4170] ---- ---- [ 59.554616][ T4170] lock(&trie->lock); [ 59.558676][ T4170] lock(hrtimer_bases.lock); [ 59.565856][ T4170] lock(&trie->lock); [ 59.572432][ T4170] lock(krc.lock); [ 59.576224][ T4170] [ 59.576224][ T4170] *** DEADLOCK *** [ 59.576224][ T4170] [ 59.584343][ T4170] 2 locks held by syz-executor264/4170: [ 59.589867][ T4170] #0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 59.599168][ T4170] #1: ffff888024af89b8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x90/0x690 [ 59.608461][ T4170] [ 59.608461][ T4170] stack backtrace: [ 59.614341][ T4170] CPU: 1 PID: 4170 Comm: syz-executor264 Not tainted 5.15.177-syzkaller #0 [ 59.622997][ T4170] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 59.633041][ T4170] Call Trace: [ 59.636305][ T4170] [ 59.639654][ T4170] dump_stack_lvl+0x1e3/0x2d0 [ 59.644322][ T4170] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 59.649945][ T4170] ? print_circular_bug+0x12b/0x1a0 [ 59.655156][ T4170] check_noncircular+0x2f8/0x3b0 [ 59.660085][ T4170] ? add_chain_block+0x850/0x850 [ 59.665030][ T4170] ? lockdep_lock+0x11f/0x2a0 [ 59.669695][ T4170] ? __lock_acquire+0x1295/0x1ff0 [ 59.674710][ T4170] validate_chain+0x1649/0x5930 [ 59.679664][ T4170] ? read_lock_is_recursive+0x10/0x10 [ 59.685060][ T4170] ? stack_depot_save+0x3db/0x440 [ 59.690084][ T4170] ? do_raw_spin_lock+0x14a/0x370 [ 59.695099][ T4170] ? reacquire_held_locks+0x660/0x660 [ 59.700463][ T4170] ? do_raw_spin_unlock+0x137/0x8b0 [ 59.705650][ T4170] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 59.711539][ T4170] ? _raw_spin_unlock+0x40/0x40 [ 59.716376][ T4170] ? stack_trace_save+0x113/0x1c0 [ 59.721411][ T4170] ? stack_trace_snprint+0xe0/0xe0 [ 59.726508][ T4170] ? mark_lock+0x98/0x340 [ 59.730903][ T4170] __lock_acquire+0x1295/0x1ff0 [ 59.735771][ T4170] lock_acquire+0x1db/0x4f0 [ 59.740274][ T4170] ? kvfree_call_rcu+0x1b5/0x8a0 [ 59.745202][ T4170] ? read_lock_is_recursive+0x10/0x10 [ 59.750568][ T4170] _raw_spin_lock+0x2a/0x40 [ 59.755080][ T4170] ? kvfree_call_rcu+0x1b5/0x8a0 [ 59.760004][ T4170] kvfree_call_rcu+0x1b5/0x8a0 [ 59.764781][ T4170] ? _raw_spin_lock_irqsave+0xac/0x120 [ 59.770262][ T4170] ? call_rcu+0xa70/0xa70 [ 59.774576][ T4170] ? _raw_spin_lock_irqsave+0xdd/0x120 [ 59.780020][ T4170] ? _raw_spin_lock+0x40/0x40 [ 59.784686][ T4170] ? read_lock_is_recursive+0x10/0x10 [ 59.790044][ T4170] ? longest_prefix_match+0x49b/0x640 [ 59.795426][ T4170] trie_delete_elem+0x520/0x690 [ 59.800355][ T4170] bpf_prog_8c8ab8634bca3061+0x3a/0x7d0 [ 59.805903][ T4170] bpf_trace_run3+0x1d1/0x380 [ 59.810568][ T4170] ? bpf_trace_run2+0x340/0x340 [ 59.815403][ T4170] ? do_sys_openat2+0x202/0x4f0 [ 59.820240][ T4170] ? lockdep_hardirqs_on+0x94/0x130 [ 59.825428][ T4170] ? do_sys_openat2+0x202/0x4f0 [ 59.830271][ T4170] __bpf_trace_kmem_cache_free+0x99/0xc0 [ 59.835979][ T4170] ? do_sys_openat2+0x202/0x4f0 [ 59.840817][ T4170] kmem_cache_free+0x1ce/0x1f0 [ 59.845574][ T4170] ? fd_install+0x2b1/0x4c0 [ 59.850065][ T4170] do_sys_openat2+0x202/0x4f0 [ 59.854731][ T4170] ? do_sys_open+0x220/0x220 [ 59.859311][ T4170] __x64_sys_openat+0x243/0x290 [ 59.864194][ T4170] ? __ia32_sys_open+0x270/0x270 [ 59.869141][ T4170] ? syscall_enter_from_user_mode+0x2e/0x240 [ 59.875124][ T4170] ? lockdep_hardirqs_on+0x94/0x130 [ 59.880333][ T4170] ? syscall_enter_from_user_mode+0x2e/0x240 [ 59.886308][ T4170] do_syscall_64+0x3b/0xb0 [ 59.890714][ T4170] ? clear_bhb_loop+0x15/0x70 [ 59.895378][ T4170] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 59.901263][ T4170] RIP: 0033:0x7f3648a26191 [ 59.905668][ T4170] Code: 75 57 89 f0 25 00 00 41 00 3d 00 00 41 00 74 49 80 3d 1a 8f 07 00 00 74 6d 89 da 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 93 00 00 00 48 8b 54 24 28 64 48 2b 14 25 [ 59.925521][ T4170] RSP: 002b:00007fff75008dc0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 [ 59.933941][ T4170] RAX: ffffffffffffffda RBX: 0000000000080001 RCX: 00007f3648a26191 executing program executing program executing program executing program executing program executing program [ 59.941918][ T4170] RDX: 0000000000080001 RSI: 00007f3648a70022 RDI: 00000000ffffff9c [ 59.949876][ T4170] RBP: 00007f3648a70022 R08: 0000000000000000 R09: 0000000000000000 [ 59.957834][ T4170] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff75008e60 [ 59.965794][ T4170] R13: 00007fff75009548 R14: 00007fff75009350 R15: 00007fff75009340 [ 59.973761][ T4170] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program