program: r0 = socket$kcm(0x23, 0x5, 0x0) listen(r0, 0x800) r1 = socket$kcm(0x10, 0x2, 0x0) sendmsg$inet(r1, &(0x7f0000000440)={0x0, 0x0, &(0x7f0000000f00)=[{&(0x7f0000000200)="5c00000014006b05c84e21000ab16d6e230675f811000000440002005817d30461bc24eeb556a7ef595105ea1698fa51f60a64c9f408000000e786a6d0bdbdc3d44bd70011b6c0504bb9189d9193e9bd00"/92, 0x5c}], 0x1, 0x0, 0x0, 0x1f00c00e}, 0x240040c4) accept4(r0, 0x0, 0x0, 0x80000) r2 = socket$phonet_pipe(0x23, 0x5, 0x2) connect$phonet_pipe(r2, &(0x7f0000000040)={0x23, 0x0, 0x58}, 0x10) [ 85.315724][ T5285] Bluetooth: hci0: command tx timeout [ 85.392902][ T5322] netlink: 'syz.0.0': attribute type 2 has an invalid length. [ 85.464635][ C0] [ 85.465869][ C0] ================================ [ 85.468081][ C0] WARNING: inconsistent lock state [ 85.470232][ C0] syzkaller #0 Not tainted [ 85.472109][ C0] -------------------------------- [ 85.474265][ C0] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 85.477329][ C0] syz.0.0/5321 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 85.479890][ C0] ffff888011e93c68 (slock-AF_PHONET/1){+.?.}-{3:3}, at: __sk_receive_skb+0x1bf/0x9e0 [ 85.483863][ C0] {SOFTIRQ-ON-W} state was registered at: [ 85.486286][ C0] lock_acquire+0x106/0x350 [ 85.488328][ C0] _raw_spin_lock_nested+0x32/0x50 [ 85.490557][ C0] __sk_receive_skb+0x1bf/0x9e0 [ 85.492674][ C0] pep_do_rcv+0x685/0xaa0 [ 85.494559][ C0] __release_sock+0x297/0x3a0 [ 85.496672][ C0] release_sock+0x190/0x260 [ 85.498681][ C0] pep_sock_accept+0xdf5/0x12b0 [ 85.500897][ C0] pn_socket_accept+0xc9/0x2e0 [ 85.503079][ C0] do_accept+0x521/0x760 [ 85.505039][ C0] __sys_accept4+0x139/0x230 [ 85.507148][ C0] __x64_sys_accept4+0x9a/0xb0 [ 85.509163][ C0] do_syscall_64+0x15f/0xf80 [ 85.511149][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.513627][ C0] irq event stamp: 2028 [ 85.515372][ C0] hardirqs last enabled at (2028): [] _raw_spin_unlock_irq+0x23/0x50 [ 85.519516][ C0] hardirqs last disabled at (2027): [] _raw_spin_lock_irq+0x17/0x50 [ 85.523588][ C0] softirqs last enabled at (2022): [] netif_rx+0x79/0x90 [ 85.527385][ C0] softirqs last disabled at (2023): [] do_softirq+0x76/0xd0 [ 85.531106][ C0] [ 85.531106][ C0] other info that might help us debug this: [ 85.534385][ C0] Possible unsafe locking scenario: [ 85.534385][ C0] [ 85.537708][ C0] CPU0 [ 85.539171][ C0] ---- [ 85.540710][ C0] lock(slock-AF_PHONET/1); [ 85.542732][ C0] [ 85.544245][ C0] lock(slock-AF_PHONET/1); [ 85.546365][ C0] [ 85.546365][ C0] *** DEADLOCK *** [ 85.546365][ C0] [ 85.549743][ C0] 5 locks held by syz.0.0/5321: [ 85.551768][ C0] #0: ffff88804787ac40 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240 [ 85.556051][ C0] #1: ffff888011e94360 (sk_lock-AF_PHONET){+.+.}-{0:0}, at: pep_sock_close+0x86/0x5b0 [ 85.560094][ C0] #2: ffffffff8e95cca0 (rcu_read_lock){....}-{1:3}, at: process_backlog+0x3eb/0x1950 [ 85.564158][ C0] #3: ffff888011e94968 (slock-AF_PHONET){+.-.}-{3:3}, at: __sk_receive_skb+0x1f1/0x9e0 [ 85.568187][ C0] #4: ffff888011e949e0 (sk_lock-AF_PHONET){+.+.}-{0:0}, at: phonet_rcv+0x781/0xc40 [ 85.572112][ C0] [ 85.572112][ C0] stack backtrace: [ 85.574640][ C0] CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.574654][ C0] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 85.574660][ C0] Call Trace: [ 85.574667][ C0] [ 85.574672][ C0] dump_stack_lvl+0xe8/0x150 [ 85.574687][ C0] print_usage_bug+0x28b/0x2e0 [ 85.574701][ C0] mark_lock_irq+0x410/0x420 [ 85.574712][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 85.574730][ C0] mark_lock+0x115/0x190 [ 85.574742][ C0] __lock_acquire+0x689/0x2cf0 [ 85.574755][ C0] ? sk_filter_trim_cap+0x1a7/0xe70 [ 85.574772][ C0] ? sk_filter_trim_cap+0x91e/0xe70 [ 85.574786][ C0] ? ret_from_fork_asm+0x1a/0x30 [ 85.574800][ C0] ? __sk_receive_skb+0x1bf/0x9e0 [ 85.574811][ C0] lock_acquire+0x106/0x350 [ 85.574822][ C0] ? __sk_receive_skb+0x1bf/0x9e0 [ 85.574836][ C0] _raw_spin_lock_nested+0x32/0x50 [ 85.574853][ C0] ? __sk_receive_skb+0x1bf/0x9e0 [ 85.574864][ C0] __sk_receive_skb+0x1bf/0x9e0 [ 85.574877][ C0] pep_do_rcv+0x685/0xaa0 [ 85.574892][ C0] ? __pfx_pep_do_rcv+0x10/0x10 [ 85.574908][ C0] ? __pfx_pep_do_rcv+0x10/0x10 [ 85.574922][ C0] ? phonet_rcv+0x781/0xc40 [ 85.574933][ C0] __sk_receive_skb+0x962/0x9e0 [ 85.574945][ C0] phonet_rcv+0x781/0xc40 [ 85.574957][ C0] ? sock_wfree+0x28e/0x750 [ 85.574973][ C0] ? __pfx_phonet_rcv+0x10/0x10 [ 85.574988][ C0] ? process_backlog+0x3eb/0x1950 [ 85.575000][ C0] ? process_backlog+0x3eb/0x1950 [ 85.575011][ C0] ? __pfx_phonet_rcv+0x10/0x10 [ 85.575024][ C0] ? process_backlog+0x3eb/0x1950 [ 85.575035][ C0] process_backlog+0xc66/0x1950 [ 85.575051][ C0] __napi_poll+0xae/0x340 [ 85.575060][ C0] ? skb_defer_free_flush+0x233/0x260 [ 85.575072][ C0] net_rx_action+0x627/0xf70 [ 85.575083][ C0] ? lock_acquire+0x106/0x350 [ 85.575097][ C0] ? __pfx_net_rx_action+0x10/0x10 [ 85.575116][ C0] handle_softirqs+0x22a/0x840 [ 85.575130][ C0] ? do_softirq+0x76/0xd0 [ 85.575148][ C0] ? netif_rx+0x79/0x90 [ 85.575162][ C0] do_softirq+0x76/0xd0 [ 85.575173][ C0] [ 85.575177][ C0] [ 85.575181][ C0] __local_bh_enable_ip+0xf8/0x130 [ 85.575193][ C0] netif_rx+0x83/0x90 [ 85.575207][ C0] pn_send+0x62a/0x8e0 [ 85.575222][ C0] pn_skb_send+0x218/0x510 [ 85.575236][ C0] pep_sock_close+0x2c1/0x5b0 [ 85.575251][ C0] pn_socket_release+0x9b/0xc0 [ 85.575263][ C0] sock_close+0xc3/0x240 [ 85.575278][ C0] ? __pfx_sock_close+0x10/0x10 [ 85.575293][ C0] __fput+0x44f/0xa60 [ 85.575307][ C0] task_work_run+0x1d9/0x270 [ 85.575324][ C0] ? __pfx_task_work_run+0x10/0x10 [ 85.575341][ C0] exit_to_user_mode_loop+0xf3/0x4d0 [ 85.575353][ C0] ? rcu_is_watching+0x15/0xb0 [ 85.575368][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.575380][ C0] do_syscall_64+0x33e/0xf80 [ 85.575395][ C0] ? trace_irq_disable+0x3b/0x140 [ 85.575412][ C0] ? clear_bhb_loop+0x40/0x90 [ 85.575423][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.575434][ C0] RIP: 0033:0x7feb85b9ce59 [ 85.575446][ C0] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 85.575457][ C0] RSP: 002b:00007ffd071e0088 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 85.575470][ C0] RAX: 0000000000000000 RBX: 00007feb85e17da0 RCX: 00007feb85b9ce59 [ 85.575478][ C0] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 85.575484][ C0] RBP: 00007feb85e17da0 R08: 00007feb85e16038 R09: 0000000000000000 [ 85.575491][ C0] R10: 0000000000dfa8d0 R11: 0000000000000246 R12: 000000000001503d [ 85.575498][ C0] R13: 00007feb85e1609c R14: 0000000000014d7f R15: 00007feb85e16090 [ 85.575510][ C0]