Warning: Permanently added '10.128.0.32' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 59.961887][ T4173] [ 59.964245][ T4173] ====================================================== [ 59.972080][ T4173] WARNING: possible circular locking dependency detected [ 59.979101][ T4173] 5.15.175-syzkaller #0 Not tainted [ 59.984367][ T4173] ------------------------------------------------------ [ 59.991363][ T4173] syz-executor121/4173 is trying to acquire lock: [ 59.997755][ T4173] ffff888075e4e020 (&htab->lockdep_key#2){....}-{2:2}, at: htab_map_delete_elem+0x1bd/0x560 [ 60.007872][ T4173] [ 60.007872][ T4173] but task is already holding lock: [ 60.015234][ T4173] ffff888075e4e0a0 (&htab->lockdep_key#3){....}-{2:2}, at: htab_map_update_elem+0x245/0x9c0 [ 60.025312][ T4173] [ 60.025312][ T4173] which lock already depends on the new lock. [ 60.025312][ T4173] [ 60.035696][ T4173] [ 60.035696][ T4173] the existing dependency chain (in reverse order) is: [ 60.044702][ T4173] [ 60.044702][ T4173] -> #1 (&htab->lockdep_key#3){....}-{2:2}: [ 60.052925][ T4173] lock_acquire+0x1db/0x4f0 [ 60.057952][ T4173] _raw_spin_lock_irqsave+0xd1/0x120 [ 60.063763][ T4173] htab_map_delete_elem+0x1bd/0x560 [ 60.069494][ T4173] bpf_prog_2c29ac5cdc6b1842+0x3a/0x850 [ 60.075548][ T4173] bpf_trace_run4+0x1ea/0x390 [ 60.080741][ T4173] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 60.086726][ T4173] __traceiter_mm_page_alloc+0x35/0x50 [ 60.092736][ T4173] __alloc_pages+0x6e0/0x700 [ 60.097839][ T4173] kmalloc_large_node+0x7c/0x180 [ 60.103301][ T4173] __kmalloc_node+0x22d/0x390 [ 60.108483][ T4173] bpf_map_kmalloc_node+0xdb/0x160 [ 60.114111][ T4173] alloc_htab_elem+0x28b/0x920 [ 60.119400][ T4173] htab_map_update_elem+0x3cb/0x9c0 [ 60.125180][ T4173] bpf_map_update_value+0x5d7/0x6c0 [ 60.130912][ T4173] map_update_elem+0x6a0/0x7c0 [ 60.136352][ T4173] __sys_bpf+0x2fd/0x670 [ 60.141128][ T4173] __x64_sys_bpf+0x78/0x90 [ 60.146062][ T4173] do_syscall_64+0x3b/0xb0 [ 60.150996][ T4173] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 60.157412][ T4173] [ 60.157412][ T4173] -> #0 (&htab->lockdep_key#2){....}-{2:2}: [ 60.165475][ T4173] validate_chain+0x1649/0x5930 [ 60.170847][ T4173] __lock_acquire+0x1295/0x1ff0 [ 60.176201][ T4173] lock_acquire+0x1db/0x4f0 [ 60.181208][ T4173] _raw_spin_lock_irqsave+0xd1/0x120 [ 60.187001][ T4173] htab_map_delete_elem+0x1bd/0x560 [ 60.192702][ T4173] bpf_prog_2c29ac5cdc6b1842+0x3a/0xea8 [ 60.198761][ T4173] bpf_trace_run4+0x1ea/0x390 [ 60.203951][ T4173] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 60.209934][ T4173] __traceiter_mm_page_alloc+0x35/0x50 [ 60.215998][ T4173] __alloc_pages+0x6e0/0x700 [ 60.221100][ T4173] kmalloc_large_node+0x7c/0x180 [ 60.226570][ T4173] __kmalloc_node+0x22d/0x390 [ 60.231897][ T4173] bpf_map_kmalloc_node+0xdb/0x160 [ 60.237536][ T4173] alloc_htab_elem+0x28b/0x920 [ 60.242965][ T4173] htab_map_update_elem+0x3cb/0x9c0 [ 60.248697][ T4173] bpf_map_update_value+0x5d7/0x6c0 [ 60.254439][ T4173] map_update_elem+0x6a0/0x7c0 [ 60.259830][ T4173] __sys_bpf+0x2fd/0x670 [ 60.264597][ T4173] __x64_sys_bpf+0x78/0x90 [ 60.269525][ T4173] do_syscall_64+0x3b/0xb0 [ 60.274454][ T4173] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 60.280858][ T4173] [ 60.280858][ T4173] other info that might help us debug this: [ 60.280858][ T4173] [ 60.291073][ T4173] Possible unsafe locking scenario: [ 60.291073][ T4173] [ 60.298506][ T4173] CPU0 CPU1 [ 60.303958][ T4173] ---- ---- [ 60.309313][ T4173] lock(&htab->lockdep_key#3); [ 60.314152][ T4173] lock(&htab->lockdep_key#2); [ 60.321510][ T4173] lock(&htab->lockdep_key#3); [ 60.328993][ T4173] lock(&htab->lockdep_key#2); [ 60.333875][ T4173] [ 60.333875][ T4173] *** DEADLOCK *** [ 60.333875][ T4173] [ 60.342124][ T4173] 3 locks held by syz-executor121/4173: [ 60.347666][ T4173] #0: ffffffff8cb1fd20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 60.356987][ T4173] #1: ffff888075e4e0a0 (&htab->lockdep_key#3){....}-{2:2}, at: htab_map_update_elem+0x245/0x9c0 [ 60.367506][ T4173] #2: ffffffff8cb1fd20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 60.376888][ T4173] [ 60.376888][ T4173] stack backtrace: [ 60.382769][ T4173] CPU: 1 PID: 4173 Comm: syz-executor121 Not tainted 5.15.175-syzkaller #0 [ 60.391348][ T4173] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 60.401936][ T4173] Call Trace: [ 60.405215][ T4173] [ 60.408140][ T4173] dump_stack_lvl+0x1e3/0x2d0 [ 60.412909][ T4173] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 60.418548][ T4173] ? print_circular_bug+0x12b/0x1a0 [ 60.423746][ T4173] check_noncircular+0x2f8/0x3b0 [ 60.428681][ T4173] ? add_chain_block+0x850/0x850 [ 60.433607][ T4173] ? lockdep_lock+0x11f/0x2a0 [ 60.438277][ T4173] validate_chain+0x1649/0x5930 [ 60.443260][ T4173] ? reacquire_held_locks+0x660/0x660 [ 60.448620][ T4173] ? is_bpf_text_address+0x24f/0x260 [ 60.453981][ T4173] ? stack_trace_save+0x1c0/0x1c0 [ 60.459556][ T4173] ? unwind_get_return_address+0x49/0x80 [ 60.465201][ T4173] ? reacquire_held_locks+0x660/0x660 [ 60.470568][ T4173] ? mark_lock+0x98/0x340 [ 60.474901][ T4173] __lock_acquire+0x1295/0x1ff0 [ 60.479746][ T4173] lock_acquire+0x1db/0x4f0 [ 60.484244][ T4173] ? htab_map_delete_elem+0x1bd/0x560 [ 60.489621][ T4173] ? bpf_map_kmalloc_node+0xdb/0x160 [ 60.494900][ T4173] ? read_lock_is_recursive+0x10/0x10 [ 60.500270][ T4173] _raw_spin_lock_irqsave+0xd1/0x120 [ 60.505548][ T4173] ? htab_map_delete_elem+0x1bd/0x560 [ 60.510924][ T4173] ? _raw_spin_lock+0x40/0x40 [ 60.515602][ T4173] ? htab_map_hash+0x2ad/0x6c0 [ 60.520557][ T4173] htab_map_delete_elem+0x1bd/0x560 [ 60.525765][ T4173] bpf_prog_2c29ac5cdc6b1842+0x3a/0xea8 [ 60.531332][ T4173] bpf_trace_run4+0x1ea/0x390 [ 60.536030][ T4173] ? bpf_trace_run3+0x380/0x380 [ 60.540891][ T4173] ? __alloc_pages+0x700/0x700 [ 60.545750][ T4173] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 60.551232][ T4173] __traceiter_mm_page_alloc+0x35/0x50 [ 60.556688][ T4173] __alloc_pages+0x6e0/0x700 [ 60.561268][ T4173] ? __rmqueue_pcplist+0x23a0/0x23a0 [ 60.566550][ T4173] ? mark_lock+0x98/0x340 [ 60.570868][ T4173] kmalloc_large_node+0x7c/0x180 [ 60.575796][ T4173] __kmalloc_node+0x22d/0x390 [ 60.580460][ T4173] ? __rwlock_init+0x140/0x140 [ 60.585214][ T4173] bpf_map_kmalloc_node+0xdb/0x160 [ 60.590322][ T4173] alloc_htab_elem+0x28b/0x920 [ 60.595079][ T4173] htab_map_update_elem+0x3cb/0x9c0 [ 60.600302][ T4173] bpf_map_update_value+0x5d7/0x6c0 [ 60.605506][ T4173] map_update_elem+0x6a0/0x7c0 [ 60.610283][ T4173] __sys_bpf+0x2fd/0x670 [ 60.614560][ T4173] ? bpf_link_show_fdinfo+0x2d0/0x2d0 [ 60.620257][ T4173] ? syscall_enter_from_user_mode+0x2e/0x240 [ 60.626360][ T4173] ? lockdep_hardirqs_on+0x94/0x130 [ 60.631596][ T4173] __x64_sys_bpf+0x78/0x90 [ 60.636010][ T4173] do_syscall_64+0x3b/0xb0 [ 60.640434][ T4173] ? clear_bhb_loop+0x15/0x70 [ 60.645102][ T4173] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 60.651008][ T4173] RIP: 0033:0x7f983b7d3029 [ 60.655432][ T4173] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 60.675131][ T4173] RSP: 002b:00007fffd87e59c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 60.683573][ T4173] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f983b7d3029 [ 60.691550][ T4173] RDX: 0000000000000020 RSI: 0000000020000280 RDI: 0000000000000002 [ 60.699538][ T4173] RBP: 0000000000000000 R08: 00000000000000a0 R09: 00000000000000a0 executing program executing program executing program [ 60.707508][ T4173] R10: 00000000000000a0 R11: 0000000000000246 R12: 0000000000000000 [ 60.715470][ T4173] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 60.723457][ T4173] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program