================================================================== BUG: KMSAN: uninit-value in ip_vs_lblc_check_expire+0xe62/0xf10 net/netfilter/ipvs/ip_vs_lblc.c:315 CPU: 0 PID: 4594 Comm: syz-executor1 Not tainted 4.17.0+ #22 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+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:990 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:640 ip_vs_lblc_check_expire+0xe62/0xf10 net/netfilter/ipvs/ip_vs_lblc.c:315 call_timer_fn+0x280/0x5d0 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xd96/0x11b0 kernel/time/timer.c:1666 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692 __do_softirq+0x592/0x979 kernel/softirq.c:285 do_softirq_own_stack+0x49/0x80 arch/x86/entry/entry_64.S:1054 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x114/0x140 kernel/softirq.c:182 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32 tcp_close+0x1310/0x18f0 net/ipv4/tcp.c:2329 inet_release+0x249/0x2b0 net/ipv4/af_inet.c:427 sock_release net/socket.c:594 [inline] sock_close+0xeb/0x310 net/socket.c:1149 __fput+0x458/0xa30 fs/file_table.c:209 ____fput+0x37/0x40 fs/file_table.c:243 task_work_run+0x22e/0x2b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop arch/x86/entry/common.c:166 [inline] prepare_exit_to_usermode+0x33c/0x3a0 arch/x86/entry/common.c:196 syscall_return_slowpath+0xe9/0x710 arch/x86/entry/common.c:265 do_syscall_64+0x1ad/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x40fc60 RSP: 002b:0000000000a3e328 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000a3e350 RCX: 000000000040fc60 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 0000000000707f20 R08: 00000000000002d8 R09: 0000000000004000 R10: 0000000000707800 R11: 0000000000000246 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000707f20 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline] kmsan_internal_alloc_meta_for_pages+0x146/0x700 mm/kmsan/kmsan.c:702 kmsan_alloc_page+0x75/0xd0 mm/kmsan/kmsan_hooks.c:250 __alloc_pages_nodemask+0xf7b/0x5cc0 mm/page_alloc.c:4404 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:494 [inline] kmalloc_order mm/slab_common.c:1148 [inline] kmalloc_order_trace+0xbb/0x390 mm/slab_common.c:1159 kmalloc_large include/linux/slab.h:446 [inline] __kmalloc+0x335/0x350 mm/slub.c:3805 kmalloc include/linux/slab.h:517 [inline] ip_vs_lblc_init_svc+0x57/0x310 net/netfilter/ipvs/ip_vs_lblc.c:355 ip_vs_bind_scheduler+0xa9/0x1f0 net/netfilter/ipvs/ip_vs_sched.c:51 ip_vs_add_service+0xa9d/0x1d90 net/netfilter/ipvs/ip_vs_ctl.c:1265 do_ip_vs_set_ctl+0x2aa9/0x2cd0 net/netfilter/ipvs/ip_vs_ctl.c:2462 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x47c/0x4e0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x24b/0x2b0 net/ipv4/ip_sockglue.c:1251 udp_setsockopt+0x108/0x1b0 net/ipv4/udp.c:2416 ipv6_setsockopt+0x311/0x350 net/ipv6/ipv6_sockglue.c:917 tcp_setsockopt+0x1c0/0x1f0 net/ipv4/tcp.c:2891 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3039 __sys_setsockopt+0x496/0x540 net/socket.c:1903 __do_sys_setsockopt net/socket.c:1914 [inline] __se_sys_setsockopt net/socket.c:1911 [inline] __x64_sys_setsockopt+0x15c/0x1c0 net/socket.c:1911 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================