IPVS: ftp: loaded support on port[0] = 21 ================================ WARNING: inconsistent lock state 4.19.195-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. syz-executor.1/8785 [HC0[0]:SC0[0]:HE1:SE1] takes: 00000000a5d06140 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}, at: spin_lock include/linux/spinlock.h:329 [inline] 00000000a5d06140 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}, at: sco_conn_del+0xe2/0x240 net/bluetooth/sco.c:175 {IN-SOFTIRQ-W} state was registered at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] sco_sock_timeout+0x31/0x210 net/bluetooth/sco.c:82 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 __read_once_size include/linux/compiler.h:261 [inline] check_kcov_mode kernel/kcov.c:69 [inline] __sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101 get_current arch/x86/include/asm/current.h:15 [inline] need_resched include/linux/sched.h:1738 [inline] copy_pte_range mm/memory.c:1106 [inline] copy_pmd_range mm/memory.c:1165 [inline] copy_pud_range mm/memory.c:1199 [inline] copy_p4d_range mm/memory.c:1221 [inline] copy_page_range+0xe1a/0x2ff0 mm/memory.c:1283 dup_mmap kernel/fork.c:549 [inline] dup_mm kernel/fork.c:1284 [inline] copy_mm kernel/fork.c:1340 [inline] copy_process.part.0+0x5b22/0x8260 kernel/fork.c:1912 copy_process kernel/fork.c:1709 [inline] _do_fork+0x22f/0xf30 kernel/fork.c:2218 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 2109 hardirqs last enabled at (2109): [] kfree+0x110/0x210 mm/slab.c:3823 hardirqs last disabled at (2108): [] kfree+0x6f/0x210 mm/slab.c:3816 softirqs last enabled at (370): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (351): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (351): [] irq_exit+0x215/0x260 kernel/softirq.c:412 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(slock-AF_BLUETOOTH-BTPROTO_SCO); lock(slock-AF_BLUETOOTH-BTPROTO_SCO); *** DEADLOCK *** 3 locks held by syz-executor.1/8785: #0: 000000008b3f0e58 (&hdev->req_lock){+.+.}, at: hci_dev_do_close+0x196/0xf10 net/bluetooth/hci_core.c:1623 #1: 000000004bb8433b (&hdev->lock){+.+.}, at: hci_dev_do_close+0x2e0/0xf10 net/bluetooth/hci_core.c:1660 #2: 000000006dbd50f2 (hci_cb_list_lock){+.+.}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1259 [inline] #2: 000000006dbd50f2 (hci_cb_list_lock){+.+.}, at: hci_conn_hash_flush+0xda/0x260 net/bluetooth/hci_conn.c:1512 stack backtrace: CPU: 1 PID: 8785 Comm: syz-executor.1 Not tainted 4.19.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_usage_bug.cold+0x42e/0x570 kernel/locking/lockdep.c:2545 valid_state kernel/locking/lockdep.c:2558 [inline] mark_lock_irq kernel/locking/lockdep.c:2752 [inline] mark_lock+0xc70/0x1160 kernel/locking/lockdep.c:3132 mark_irqflags kernel/locking/lockdep.c:3028 [inline] __lock_acquire+0x6a8/0x3ff0 kernel/locking/lockdep.c:3373 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] sco_conn_del+0xe2/0x240 net/bluetooth/sco.c:175 sco_disconn_cfm+0x74/0xb0 net/bluetooth/sco.c:1133 hci_disconn_cfm include/net/bluetooth/hci_core.h:1262 [inline] hci_conn_hash_flush+0x127/0x260 net/bluetooth/hci_conn.c:1512 hci_dev_do_close+0x659/0xf10 net/bluetooth/hci_core.c:1673 hci_unregister_dev+0x18b/0x910 net/bluetooth/hci_core.c:3278 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:354 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665d9 Code: Bad RIP value. RSP: 002b:00007f6c5966a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88 RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c R13: 00007ffded75ffff R14: 00007f6c5966a300 R15: 0000000000022000 IPVS: ftp: loaded support on port[0] = 21 batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode device hsr_slave_1 left promiscuous mode device hsr_slave_0 left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves audit: type=1107 audit(1624738951.322:6728): pid=29983 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='' netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21