DUID 00:04:0a:4f:87:b7:af:93:53:06:11:57:05:50:3c:bb:1e:66 forked to background, child pid 3216 [ 37.206456][ T3217] 8021q: adding VLAN 0 to HW filter on device bond0 [ 37.223796][ T3217] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.60' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 56.896115][ T3614] [ 56.898483][ T3614] ============================================ [ 56.904628][ T3614] WARNING: possible recursive locking detected [ 56.910794][ T3614] 6.1.87-syzkaller #0 Not tainted [ 56.915813][ T3614] -------------------------------------------- [ 56.921971][ T3614] syz-executor142/3614 is trying to acquire lock: [ 56.928523][ T3614] ffff88801f09df68 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_delete_elem+0x177/0x400 [ 56.938914][ T3614] [ 56.938914][ T3614] but task is already holding lock: [ 56.946261][ T3614] ffff888079852068 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_update_common+0x20c/0xa30 [ 56.956782][ T3614] [ 56.956782][ T3614] other info that might help us debug this: [ 56.964822][ T3614] Possible unsafe locking scenario: [ 56.964822][ T3614] [ 56.972256][ T3614] CPU0 [ 56.975529][ T3614] ---- [ 56.978807][ T3614] lock(&htab->buckets[i].lock); [ 56.983842][ T3614] lock(&htab->buckets[i].lock); [ 56.988858][ T3614] [ 56.988858][ T3614] *** DEADLOCK *** [ 56.988858][ T3614] [ 56.996990][ T3614] May be due to missing lock nesting notation [ 56.996990][ T3614] [ 57.005291][ T3614] 4 locks held by syz-executor142/3614: [ 57.010824][ T3614] #0: ffff88807af16930 (sk_lock-AF_UNIX){+.+.}-{0:0}, at: sock_map_update_elem_sys+0x1c8/0x910 [ 57.021297][ T3614] #1: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: sock_map_update_elem_sys+0x1d4/0x910 [ 57.031580][ T3614] #2: ffff888079852068 (&htab->buckets[i].lock){+.-.}-{2:2}, at: sock_hash_update_common+0x20c/0xa30 [ 57.042557][ T3614] #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 [ 57.051957][ T3614] [ 57.051957][ T3614] stack backtrace: [ 57.057842][ T3614] CPU: 1 PID: 3614 Comm: syz-executor142 Not tainted 6.1.87-syzkaller #0 [ 57.066265][ T3614] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 57.076309][ T3614] Call Trace: [ 57.079589][ T3614] [ 57.082512][ T3614] dump_stack_lvl+0x1e3/0x2cb [ 57.087208][ T3614] ? nf_tcp_handle_invalid+0x642/0x642 [ 57.092664][ T3614] ? panic+0x764/0x764 [ 57.096829][ T3614] validate_chain+0x4711/0x5950 [ 57.101771][ T3614] ? reacquire_held_locks+0x660/0x660 [ 57.107147][ T3614] ? reacquire_held_locks+0x660/0x660 [ 57.112518][ T3614] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 57.118504][ T3614] ? mark_lock+0x9a/0x340 [ 57.122839][ T3614] ? mark_lock+0x9a/0x340 [ 57.127161][ T3614] ? reacquire_held_locks+0x660/0x660 [ 57.132536][ T3614] ? __lock_acquire+0x125b/0x1f80 [ 57.137594][ T3614] ? mark_lock+0x9a/0x340 [ 57.141933][ T3614] __lock_acquire+0x125b/0x1f80 [ 57.146838][ T3614] lock_acquire+0x1f8/0x5a0 [ 57.151368][ T3614] ? sock_hash_delete_elem+0x177/0x400 [ 57.156860][ T3614] ? read_lock_is_recursive+0x10/0x10 [ 57.162258][ T3614] ? sock_hash_delete_elem+0x177/0x400 [ 57.167720][ T3614] ? __bpf_trace_softirq+0x10/0x10 [ 57.172848][ T3614] ? sock_hash_delete_elem+0x177/0x400 [ 57.178314][ T3614] _raw_spin_lock_bh+0x31/0x40 [ 57.183072][ T3614] ? sock_hash_delete_elem+0x177/0x400 [ 57.188529][ T3614] sock_hash_delete_elem+0x177/0x400 [ 57.193819][ T3614] ? sock_hash_lookup+0x660/0x660 [ 57.198846][ T3614] ? validate_chain+0x112/0x5950 [ 57.203797][ T3614] ? reacquire_held_locks+0x660/0x660 [ 57.209186][ T3614] bpf_prog_de07a038b84070fd+0x3e/0x42 [ 57.214670][ T3614] ? bpf_trace_run4+0x16a/0x470 [ 57.219530][ T3614] bpf_trace_run4+0x253/0x470 [ 57.224213][ T3614] ? bpf_trace_run3+0x440/0x440 [ 57.229057][ T3614] ? __lock_acquire+0x125b/0x1f80 [ 57.234095][ T3614] __bpf_trace_mm_page_alloc+0xba/0xe0 [ 57.239550][ T3614] __traceiter_mm_page_alloc+0x35/0x50 [ 57.245014][ T3614] __alloc_pages+0x717/0x770 [ 57.249697][ T3614] ? zone_statistics+0x160/0x160 [ 57.254651][ T3614] ? alloc_pages+0x50c/0x770 [ 57.259255][ T3614] alloc_slab_page+0x6a/0x150 [ 57.263940][ T3614] new_slab+0x84/0x2d0 [ 57.268004][ T3614] ___slab_alloc+0xc20/0x1270 [ 57.272700][ T3614] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 57.278016][ T3614] __kmem_cache_alloc_node+0x19f/0x260 [ 57.283473][ T3614] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 57.288753][ T3614] ? bpf_map_kmalloc_node+0xce/0x1c0 [ 57.294087][ T3614] __kmalloc_node+0xa2/0x230 [ 57.298688][ T3614] bpf_map_kmalloc_node+0xce/0x1c0 [ 57.303805][ T3614] sock_hash_update_common+0x415/0xa30 [ 57.309295][ T3614] sock_map_update_elem_sys+0x5a0/0x910 [ 57.314839][ T3614] ? sock_map_update_elem_sys+0x1d4/0x910 [ 57.320555][ T3614] ? sock_map_prog_detach+0x290/0x290 [ 57.325943][ T3614] ? bpf_map_update_value+0x158/0x6f0 [ 57.331318][ T3614] map_update_elem+0x503/0x680 [ 57.336087][ T3614] __sys_bpf+0x337/0x6c0 [ 57.340331][ T3614] ? bpf_link_show_fdinfo+0x2d0/0x2d0 [ 57.345712][ T3614] ? print_irqtrace_events+0x210/0x210 [ 57.351173][ T3614] ? print_irqtrace_events+0x210/0x210 [ 57.356643][ T3614] ? syscall_enter_from_user_mode+0x2e/0x230 [ 57.362627][ T3614] ? lockdep_hardirqs_on+0x94/0x130 [ 57.367823][ T3614] __x64_sys_bpf+0x78/0x90 [ 57.372245][ T3614] do_syscall_64+0x3b/0xb0 [ 57.376678][ T3614] ? clear_bhb_loop+0x45/0xa0 [ 57.381358][ T3614] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 57.387270][ T3614] RIP: 0033:0x7f883856a029 [ 57.391682][ T3614] 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 [ 57.411310][ T3614] RSP: 002b:00007ffc682e1ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 57.419731][ T3614] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f883856a029 [ 57.427716][ T3614] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 57.435684][ T3614] RBP: 0000000000000000 R08: 00000000000000a0 R09: 00000000000000a0 executing program executing program [ 57.443643][ T3614] R10: 00000000000000a0 R11: 0000000000000246 R12: 0000000000000000 [ 57.451603][ T3614] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 57.459574][ T3614] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program