netlink: 'syz-executor.0': attribute type 4 has an invalid length. netlink: 'syz-executor.0': attribute type 4 has an invalid length. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:26632] Modules linked in: irq event stamp: 3285389 hardirqs last enabled at (3285388): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3285389): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (670): [] rcu_read_unlock_bh include/linux/rcupdate.h:717 [inline] softirqs last enabled at (670): [] __dev_queue_xmit+0x15f5/0x2e00 net/core/dev.c:3865 softirqs last disabled at (1131): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1131): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 26632 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3911 Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 09 2e a6 08 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0018:ffff8880ba007c50 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff888019a8c580 RCX: 0000000000005ecd RDX: dffffc0000000000 RSI: 00000000e36fbb1e RDI: 0000000000000286 RBP: ffff88809364cc40 R08: ffffffff8cd46ba8 R09: 0000000000000003 R10: ffff888019a8ce80 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007fb46c60b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a807237160 CR3: 0000000235e5d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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] pie_timer+0x92/0x740 net/sched/sch_pie.c:433 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 RIP: 0010:__skb_set_length include/linux/skbuff.h:2542 [inline] RIP: 0010:__skb_trim include/linux/skbuff.h:2548 [inline] RIP: 0010:skb_trim+0xa0/0x160 net/core/skbuff.c:1763 Code: 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c4 00 00 00 44 8b a3 84 00 00 00 31 ff 44 89 e6 e8 89 27 f2 fa 45 85 e4 0f 85 bd 3f a1 01 0b 26 f2 fa 48 8d bb d8 00 00 00 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffff88821705f328 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: ffff888010a2ad00 RCX: ffffffff86705f57 RDX: 0000000000000000 RSI: ffff888019a8c580 RDI: 0000000000000005 RBP: 0000000000000950 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000005005 R12: 0000000000000000 R13: 0000000000000010 R14: ffff888010a2ad00 R15: 0000000000000000 nlmsg_trim include/net/netlink.h:550 [inline] nla_nest_cancel include/net/netlink.h:1313 [inline] rtnetlink_put_metrics+0x45e/0x4f0 net/core/rtnetlink.c:784 fib_dump_info+0x568/0x1780 net/ipv4/fib_semantics.c:1324 fn_trie_dump_leaf net/ipv4/fib_trie.c:2038 [inline] fib_table_dump+0x578/0x8d0 net/ipv4/fib_trie.c:2069 inet_dump_fib+0x2b1/0x650 net/ipv4/fib_frontend.c:828 rtnl_dump_all+0x2ad/0x4a0 net/core/rtnetlink.c:3335 netlink_dump+0x3cf/0xc10 net/netlink/af_netlink.c:2242 __netlink_dump_start+0x4e9/0x6f0 net/netlink/af_netlink.c:2338 netlink_dump_start include/linux/netlink.h:213 [inline] rtnetlink_rcv_msg+0x71e/0xb80 net/core/rtnetlink.c:4745 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 sock_write_iter+0x287/0x3c0 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 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: 0033:0x7fb46f095ae9 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:00007fb46c60b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb46f1a8f60 RCX: 00007fb46f095ae9 RDX: 0000000000000032 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007fb46f0eff45 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff3b04408f R14: 00007fb46c60b300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 00 add %al,(%rax) 6: 00 48 c1 add %cl,-0x3f(%rax) 9: e8 03 80 3c 10 callq 0x103c8011 e: 00 0f add %cl,(%rdi) 10: 85 b7 01 00 00 48 test %esi,0x48000001(%rdi) 16: 83 3d 09 2e a6 08 00 cmpl $0x0,0x8a62e09(%rip) # 0x8a62e26 1d: 0f 84 2a 01 00 00 je 0x14d 23: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 48 83 c4 18 add $0x18,%rsp 33: 5b pop %rbx 34: 5d pop %rbp 35: 41 5c pop %r12 37: 41 5d pop %r13 39: 41 5e pop %r14 3b: 41 5f pop %r15 3d: c3 retq 3e: 65 gs 3f: 8b .byte 0x8b