Warning: Permanently added '10.128.0.141' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 58.813724][ T4175] [ 58.816089][ T4175] ====================================================== [ 58.823095][ T4175] WARNING: possible circular locking dependency detected [ 58.830094][ T4175] 5.15.178-syzkaller #0 Not tainted [ 58.835271][ T4175] ------------------------------------------------------ [ 58.842270][ T4175] syz-executor545/4175 is trying to acquire lock: [ 58.848679][ T4175] ffff88807418c1a0 (&htab->lockdep_key#7){....}-{2:2}, at: htab_map_delete_elem+0x1bd/0x560 [ 58.858777][ T4175] [ 58.858777][ T4175] but task is already holding lock: [ 58.866121][ T4175] ffff8880740871a0 (&htab->lockdep_key#8){....}-{2:2}, at: htab_map_update_elem+0x245/0x9c0 [ 58.876195][ T4175] [ 58.876195][ T4175] which lock already depends on the new lock. [ 58.876195][ T4175] [ 58.886578][ T4175] [ 58.886578][ T4175] the existing dependency chain (in reverse order) is: [ 58.895594][ T4175] [ 58.895594][ T4175] -> #1 (&htab->lockdep_key#8){....}-{2:2}: [ 58.903666][ T4175] lock_acquire+0x1db/0x4f0 [ 58.908686][ T4175] _raw_spin_lock_irqsave+0xd1/0x120 [ 58.914488][ T4175] htab_map_delete_elem+0x1bd/0x560 [ 58.920194][ T4175] bpf_prog_2c29ac5cdc6b1842+0x3a/0xd28 [ 58.926264][ T4175] bpf_trace_run4+0x1ea/0x390 [ 58.931447][ T4175] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 58.937445][ T4175] __traceiter_mm_page_alloc+0x35/0x50 [ 58.943427][ T4175] __alloc_pages+0x6e0/0x700 [ 58.948651][ T4175] kmalloc_large_node+0x7c/0x180 [ 58.954213][ T4175] __kmalloc_node+0x22d/0x390 [ 58.959411][ T4175] bpf_map_kmalloc_node+0xdb/0x160 [ 58.965036][ T4175] alloc_htab_elem+0x28b/0x920 [ 58.970315][ T4175] htab_map_update_elem+0x3cb/0x9c0 [ 58.976021][ T4175] bpf_map_update_value+0x5d7/0x6c0 [ 58.981728][ T4175] map_update_elem+0x6a0/0x7c0 [ 58.987013][ T4175] __sys_bpf+0x2fd/0x670 [ 58.991782][ T4175] __x64_sys_bpf+0x78/0x90 [ 58.996724][ T4175] do_syscall_64+0x3b/0xb0 [ 59.001665][ T4175] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 59.008080][ T4175] [ 59.008080][ T4175] -> #0 (&htab->lockdep_key#7){....}-{2:2}: [ 59.016150][ T4175] validate_chain+0x1649/0x5930 [ 59.021509][ T4175] __lock_acquire+0x1295/0x1ff0 [ 59.026882][ T4175] lock_acquire+0x1db/0x4f0 [ 59.031889][ T4175] _raw_spin_lock_irqsave+0xd1/0x120 [ 59.037680][ T4175] htab_map_delete_elem+0x1bd/0x560 [ 59.043513][ T4175] bpf_prog_2c29ac5cdc6b1842+0x3a/0x718 [ 59.049581][ T4175] bpf_trace_run4+0x1ea/0x390 [ 59.054766][ T4175] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 59.060821][ T4175] __traceiter_mm_page_alloc+0x35/0x50 [ 59.066785][ T4175] __alloc_pages+0x6e0/0x700 [ 59.071885][ T4175] kmalloc_large_node+0x7c/0x180 [ 59.077328][ T4175] __kmalloc_node+0x22d/0x390 [ 59.082523][ T4175] bpf_map_kmalloc_node+0xdb/0x160 [ 59.088142][ T4175] alloc_htab_elem+0x28b/0x920 [ 59.093411][ T4175] htab_map_update_elem+0x3cb/0x9c0 [ 59.099112][ T4175] bpf_map_update_value+0x5d7/0x6c0 [ 59.104815][ T4175] map_update_elem+0x6a0/0x7c0 [ 59.110087][ T4175] __sys_bpf+0x2fd/0x670 [ 59.114851][ T4175] __x64_sys_bpf+0x78/0x90 [ 59.119777][ T4175] do_syscall_64+0x3b/0xb0 [ 59.124705][ T4175] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 59.131107][ T4175] [ 59.131107][ T4175] other info that might help us debug this: [ 59.131107][ T4175] [ 59.141315][ T4175] Possible unsafe locking scenario: [ 59.141315][ T4175] [ 59.148770][ T4175] CPU0 CPU1 [ 59.154143][ T4175] ---- ---- [ 59.159496][ T4175] lock(&htab->lockdep_key#8); [ 59.164338][ T4175] lock(&htab->lockdep_key#7); [ 59.171691][ T4175] lock(&htab->lockdep_key#8); [ 59.179047][ T4175] lock(&htab->lockdep_key#7); [ 59.183885][ T4175] [ 59.183885][ T4175] *** DEADLOCK *** [ 59.183885][ T4175] [ 59.192007][ T4175] 3 locks held by syz-executor545/4175: [ 59.197532][ T4175] #0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 59.206844][ T4175] #1: ffff8880740871a0 (&htab->lockdep_key#8){....}-{2:2}, at: htab_map_update_elem+0x245/0x9c0 [ 59.217354][ T4175] #2: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 59.226653][ T4175] [ 59.226653][ T4175] stack backtrace: [ 59.232535][ T4175] CPU: 0 PID: 4175 Comm: syz-executor545 Not tainted 5.15.178-syzkaller #0 [ 59.241116][ T4175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 59.251337][ T4175] Call Trace: [ 59.254604][ T4175] [ 59.257540][ T4175] dump_stack_lvl+0x1e3/0x2d0 [ 59.262209][ T4175] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 59.267833][ T4175] ? print_circular_bug+0x12b/0x1a0 [ 59.273054][ T4175] check_noncircular+0x2f8/0x3b0 [ 59.277981][ T4175] ? add_chain_block+0x850/0x850 [ 59.282923][ T4175] ? queued_spin_lock_slowpath+0x42/0x50 [ 59.288557][ T4175] ? lockdep_lock+0x1a7/0x2a0 [ 59.293232][ T4175] validate_chain+0x1649/0x5930 [ 59.298077][ T4175] ? reacquire_held_locks+0x660/0x660 [ 59.303433][ T4175] ? is_bpf_text_address+0x24f/0x260 [ 59.308701][ T4175] ? stack_trace_save+0x1c0/0x1c0 [ 59.314089][ T4175] ? reacquire_held_locks+0x660/0x660 [ 59.319796][ T4175] ? mark_lock+0x98/0x340 [ 59.324119][ T4175] __lock_acquire+0x1295/0x1ff0 [ 59.328978][ T4175] lock_acquire+0x1db/0x4f0 [ 59.333482][ T4175] ? htab_map_delete_elem+0x1bd/0x560 [ 59.338952][ T4175] ? read_lock_is_recursive+0x10/0x10 [ 59.344317][ T4175] _raw_spin_lock_irqsave+0xd1/0x120 [ 59.349606][ T4175] ? htab_map_delete_elem+0x1bd/0x560 [ 59.354977][ T4175] ? _raw_spin_lock+0x40/0x40 [ 59.359641][ T4175] ? htab_map_hash+0x299/0x6c0 [ 59.364390][ T4175] htab_map_delete_elem+0x1bd/0x560 [ 59.369578][ T4175] bpf_prog_2c29ac5cdc6b1842+0x3a/0x718 [ 59.375128][ T4175] bpf_trace_run4+0x1ea/0x390 [ 59.379793][ T4175] ? bpf_trace_run3+0x380/0x380 [ 59.384631][ T4175] ? __alloc_pages+0x700/0x700 [ 59.389381][ T4175] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 59.394829][ T4175] __traceiter_mm_page_alloc+0x35/0x50 [ 59.400294][ T4175] __alloc_pages+0x6e0/0x700 [ 59.404886][ T4175] ? __rmqueue_pcplist+0x23a0/0x23a0 [ 59.410178][ T4175] ? mark_lock+0x98/0x340 [ 59.414517][ T4175] kmalloc_large_node+0x7c/0x180 [ 59.419462][ T4175] __kmalloc_node+0x22d/0x390 [ 59.424147][ T4175] ? __rwlock_init+0x140/0x140 [ 59.428918][ T4175] bpf_map_kmalloc_node+0xdb/0x160 [ 59.434021][ T4175] alloc_htab_elem+0x28b/0x920 [ 59.438778][ T4175] htab_map_update_elem+0x3cb/0x9c0 [ 59.443982][ T4175] bpf_map_update_value+0x5d7/0x6c0 [ 59.449170][ T4175] map_update_elem+0x6a0/0x7c0 [ 59.453920][ T4175] __sys_bpf+0x2fd/0x670 [ 59.458150][ T4175] ? bpf_link_show_fdinfo+0x300/0x300 [ 59.463512][ T4175] ? syscall_enter_from_user_mode+0x2e/0x240 [ 59.469492][ T4175] ? lockdep_hardirqs_on+0x94/0x130 [ 59.474773][ T4175] __x64_sys_bpf+0x78/0x90 [ 59.479186][ T4175] do_syscall_64+0x3b/0xb0 [ 59.483583][ T4175] ? clear_bhb_loop+0x15/0x70 [ 59.488250][ T4175] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 59.494149][ T4175] RIP: 0033:0x7f786e1d8f29 [ 59.498559][ T4175] 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 [ 59.518149][ T4175] RSP: 002b:00007fffb3d74198 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 59.526560][ T4175] RAX: ffffffffffffffda RBX: 5f656761705f6d6d RCX: 00007f786e1d8f29 [ 59.534519][ T4175] RDX: 0000000000000020 RSI: 0000400000000280 RDI: 0000000000000002 [ 59.542488][ T4175] RBP: 0000000000000000 R08: 00000000000000a0 R09: 00000000000000a0 [ 59.550527][ T4175] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 59.558482][ T4175] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 59.566443][ T4175]