netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. ================================ WARNING: inconsistent lock state 4.19.206-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. syz-executor.3/20369 [HC0[0]:SC0[0]:HE1:SE1] takes: 00000000f2e85eb2 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}, at: spin_lock include/linux/spinlock.h:329 [inline] 00000000f2e85eb2 (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 irq event stamp: 4254239 hardirqs last enabled at (4254239): [] kfree+0x110/0x210 mm/slab.c:3823 hardirqs last disabled at (4254238): [] kfree+0x6f/0x210 mm/slab.c:3816 softirqs last enabled at (4254052): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (4254052): [] peernet2id+0x8f/0xc0 net/core/net_namespace.c:266 softirqs last disabled at (4254050): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (4254050): [] peernet2id+0x6f/0xc0 net/core/net_namespace.c:264 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 *** 4 locks held by syz-executor.3/20369: #0: 00000000b31a885b (rfkill_global_mutex){+.+.}, at: rfkill_fop_write+0xfe/0x4a0 net/rfkill/core.c:1241 #1: 00000000c6a8fdb3 (&hdev->req_lock){+.+.}, at: hci_dev_do_close+0x196/0xf10 net/bluetooth/hci_core.c:1623 #2: 00000000ae6a2a3c (&hdev->lock){+.+.}, at: hci_dev_do_close+0x2e0/0xf10 net/bluetooth/hci_core.c:1660 #3: 000000002e1af9af (hci_cb_list_lock){+.+.}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1260 [inline] #3: 000000002e1af9af (hci_cb_list_lock){+.+.}, at: hci_conn_hash_flush+0xda/0x260 net/bluetooth/hci_conn.c:1512 stack backtrace: CPU: 0 PID: 20369 Comm: syz-executor.3 Not tainted 4.19.206-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:1263 [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_rfkill_set_block+0xe7/0x160 net/bluetooth/hci_core.c:2107 rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:353 rfkill_fop_write+0x250/0x4a0 net/rfkill/core.c:1249 __vfs_write+0xf7/0x770 fs/read_write.c:485 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f519ae33188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd6797de3f R14: 00007f519ae33300 R15: 0000000000022000 Unknown ioctl 1074025688 f2fs_msg: 38 callbacks suppressed F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock Unknown ioctl 1074025688 F2FS-fs (loop2): Unable to read 2th superblock attempt to access beyond end of device loop2: rw=12288, want=4104, limit=4 attempt to access beyond end of device loop2: rw=12288, want=8200, limit=4 team0: Device ipvlan1 failed to register rx_handler F2FS-fs (loop2): Failed to get valid F2FS checkpoint F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock IPVS: ftp: loaded support on port[0] = 21 team0: Device ipvlan1 failed to register rx_handler IPVS: ftp: loaded support on port[0] = 21 F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. team0: Device ipvlan1 failed to register rx_handler f2fs_msg: 2 callbacks suppressed F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock F2FS-fs (loop2): Unable to read 2th superblock attempt to access beyond end of device loop2: rw=12288, want=4104, limit=4 attempt to access beyond end of device loop2: rw=12288, want=8200, limit=4 team0: Device ipvlan1 failed to register rx_handler F2FS-fs (loop2): Failed to get valid F2FS checkpoint F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock F2FS-fs (loop2): Unable to read 1th superblock F2FS-fs (loop2): Unable to read 2th superblock attempt to access beyond end of device loop2: rw=12288, want=4104, limit=5 attempt to access beyond end of device loop2: rw=12288, want=8200, limit=5 team0: Device ipvlan1 failed to register rx_handler attempt to access beyond end of device loop2: rw=12288, want=4104, limit=16 attempt to access beyond end of device loop2: rw=12288, want=8200, limit=16 attempt to access beyond end of device loop2: rw=12288, want=4104, limit=16 attempt to access beyond end of device loop2: rw=12288, want=8200, limit=16 attempt to access beyond end of device loop2: rw=12288, want=4104, limit=16 attempt to access beyond end of device team0: Device ipvlan1 failed to register rx_handler loop2: rw=12288, want=8200, limit=16 attempt to access beyond end of device loop2: rw=12288, want=4104, limit=16