IPVS: set_ctl: invalid protocol: 51 172.20.20.187:20000 IPVS: set_ctl: invalid protocol: 51 172.20.20.187:20000 INFO: task syz-executor.0:11734 blocked for more than 140 seconds. Not tainted 4.14.198-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28688 11734 6381 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1731 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 ucma_close+0xfc/0x340 drivers/infiniband/core/ucma.c:1749 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4177b1 RSP: 002b:00007ffe18983b30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004177b1 RDX: 0000001b32120000 RSI: 000000000000086e RDI: 0000000000000003 RBP: 0000000000000001 R08: 00000000216a486e R09: 00000000216a4872 R10: 00007ffe18983c10 R11: 0000000000000293 R12: ffffffffffffffff R13: 0000000000217523 R14: 00000000000003e8 R15: 000000000118bf2c Showing all locks held in the system: 1 lock held by khungtaskd/1068: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1068 Comm: khungtaskd Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13959 Comm: kworker/u4:3 Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet task: ffff8880950e0180 task.stack: ffff888067880000 RIP: 0010:__orc_find+0x4d/0xf0 arch/x86/kernel/unwind_orc.c:47 RSP: 0018:ffff8880678877a0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 1ffff1100cf10f04 RCX: ffffffff850fb807 RDX: 0000000000000001 RSI: ffffffff893a11b0 RDI: ffffffff88d32f7c RBP: ffffffff88d32f7c R08: ffffffff893a11b0 R09: ffffffff893a11b6 R10: 00000000000de8a2 R11: 0000000000058071 R12: ffffffff88d32f7c R13: ffffffff88d32f7c R14: ffffffff88d32f7c R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffacc37c000 CR3: 00000000941a9000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:118 [inline] unwind_next_frame+0x59a/0x17d0 arch/x86/kernel/unwind_orc.c:355 __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc_node_trace+0x153/0x400 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] pskb_expand_head+0x128/0xd30 net/core/skbuff.c:1462 __skb_cow include/linux/skbuff.h:2936 [inline] skb_cow_head include/linux/skbuff.h:2970 [inline] batadv_skb_head_push+0x18b/0x1d0 net/batman-adv/soft-interface.c:78 batadv_send_skb_packet+0xf2/0x5c0 net/batman-adv/send.c:97 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:569 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:595 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x5d1/0x6f0 net/batman-adv/bat_iv_ogm.c:1847 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: fd 0f 87 9a 00 00 00 49 bf 00 00 00 00 00 fc ff df 49 89 fe 48 89 fd eb 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e0 48 29 e8 <48> 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85