================================================================== BUG: KMSAN: uninit-value in neigh_hash_grow net/core/neighbour.c:506 [inline] BUG: KMSAN: uninit-value in ___neigh_create+0x1963/0x2890 net/core/neighbour.c:618 CPU: 0 PID: 11476 Comm: syz-executor5 Not tainted 5.0.0-rc1+ #9 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+0x173/0x1d0 lib/dump_stack.c:113 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313 neigh_hash_grow net/core/neighbour.c:506 [inline] ___neigh_create+0x1963/0x2890 net/core/neighbour.c:618 __neigh_create+0xbd/0xd0 net/core/neighbour.c:665 ip_finish_output2+0xa0f/0x1820 net/ipv4/ip_output.c:224 ip_finish_output+0xd2b/0xfd0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x53f/0x610 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:444 [inline] ip_local_out net/ipv4/ip_output.c:124 [inline] ip_send_skb net/ipv4/ip_output.c:1465 [inline] ip_push_pending_frames+0x243/0x460 net/ipv4/ip_output.c:1485 icmp_push_reply+0x719/0x7e0 net/ipv4/icmp.c:394 icmp_send+0x2e74/0x30c0 net/ipv4/icmp.c:736 ipv4_link_failure+0x5e/0x220 net/ipv4/route.c:1187 dst_link_failure include/net/dst.h:427 [inline] arp_error_report+0x106/0x1a0 net/ipv4/arp.c:297 neigh_invalidate+0x359/0x8e0 net/core/neighbour.c:987 neigh_timer_handler+0xdf2/0x1280 net/core/neighbour.c:1073 call_timer_fn+0x285/0x600 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0xdb4/0x11d0 kernel/time/timer.c:1681 run_timer_softirq+0x2e/0x50 kernel/time/timer.c:1694 __do_softirq+0x53f/0x93a kernel/softirq.c:293 invoke_softirq kernel/softirq.c:375 [inline] irq_exit+0x214/0x250 kernel/softirq.c:416 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1064 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:814 RIP: 0010:finish_lock_switch+0x2b/0x40 kernel/sched/core.c:2584 Code: 48 89 e5 53 48 89 fb e8 83 b8 95 00 8b b8 88 0c 00 00 48 8b 00 48 85 c0 75 12 48 89 df e8 fd ac 95 00 c6 00 00 c6 03 00 fb 5b <5d> c3 e8 6e b7 95 00 eb e7 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 RSP: 0018:ffff88803361fc80 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 RAX: ffff88821fef1d40 RBX: ffff88803c010000 RCX: ccccccccccccd000 RDX: ffff88821fe2ed40 RSI: ffff888000000000 RDI: 00000000000004a0 RBP: ffff88803361fc80 R08: 0000000000000002 R09: ffff88803361fb08 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff888110ac8988 R14: ffff888110ac8000 R15: ffff88812fcb7d40 finish_task_switch+0xfc/0x2d0 kernel/sched/core.c:2685 context_switch kernel/sched/core.c:2838 [inline] __schedule+0x6cc/0x800 kernel/sched/core.c:3478 schedule+0x15b/0x240 kernel/sched/core.c:3522 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x2ba/0x980 kernel/time/hrtimer.c:1679 hrtimer_nanosleep kernel/time/hrtimer.c:1733 [inline] __do_sys_nanosleep kernel/time/hrtimer.c:1767 [inline] __se_sys_nanosleep+0x746/0x960 kernel/time/hrtimer.c:1754 __x64_sys_nanosleep+0x3e/0x60 kernel/time/hrtimer.c:1754 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x4854b0 Code: 00 00 48 c7 c0 d4 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb be 66 0f 1f 44 00 00 83 3d a1 12 5d 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 04 e2 f8 ff c3 48 83 ec 08 e8 3a 55 fd ff RSP: 002b:0000000000a4fd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 00000000000659e7 RCX: 00000000004854b0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a4fd80 RBP: 00000000000001e8 R08: 0000000000000001 R09: 00000000029f5940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 R13: 00000000000659c7 R14: 00000000000000c0 R15: 0000000000000005 Uninit was created at: No stack ==================================================================