syzbot

=====================================================
BUG: KMSAN: uninit-value in _compound_head include/linux/page-flags.h:198 [inline]
BUG: KMSAN: uninit-value in PageActive include/linux/page-flags.h:427 [inline]
BUG: KMSAN: uninit-value in PageSlabPfmemalloc include/linux/page-flags.h:919 [inline]
BUG: KMSAN: uninit-value in pfmemalloc_match mm/slub.c:2844 [inline]
BUG: KMSAN: uninit-value in ___slab_alloc+0x194a/0x1e30 mm/slub.c:3071
 _compound_head include/linux/page-flags.h:198 [inline]
 PageActive include/linux/page-flags.h:427 [inline]
 PageSlabPfmemalloc include/linux/page-flags.h:919 [inline]
 pfmemalloc_match mm/slub.c:2844 [inline]
 ___slab_alloc+0x194a/0x1e30 mm/slub.c:3071
 __slab_alloc mm/slub.c:3126 [inline]
 slab_alloc_node mm/slub.c:3217 [inline]
 slab_alloc mm/slub.c:3259 [inline]
 kmem_cache_alloc+0xbb3/0x11c0 mm/slub.c:3264
 dst_alloc+0x3ec/0xa40 net/core/dst.c:92
 ip6_dst_alloc net/ipv6/route.c:341 [inline]
 icmp6_dst_alloc+0x1c3/0xb50 net/ipv6/route.c:3271
 ndisc_send_skb+0x3a4/0x1740 net/ipv6/ndisc.c:488
 ndisc_send_rs+0xcdf/0xd40 net/ipv6/ndisc.c:702
 addrconf_rs_timer+0x709/0x960 net/ipv6/addrconf.c:3898
 call_timer_fn+0x81/0x540 kernel/time/timer.c:1421
 expire_timers+0x2f5/0x6d0 kernel/time/timer.c:1466
 __run_timers+0x66b/0x9f0 kernel/time/timer.c:1734
 run_timer_softirq+0x71/0xe0 kernel/time/timer.c:1747
 __do_softirq+0x1ee/0x7c5 kernel/softirq.c:558
 run_ksoftirqd+0x33/0x50 kernel/softirq.c:921
 smpboot_thread_fn+0x606/0xbd0 kernel/smpboot.c:164
 kthread+0x721/0x850 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

Local variable page created at:
 ___slab_alloc+0xb4/0x1e30 mm/slub.c:2918
 __slab_alloc mm/slub.c:3126 [inline]
 slab_alloc_node mm/slub.c:3217 [inline]
 slab_alloc mm/slub.c:3259 [inline]
 kmem_cache_alloc+0xbb3/0x11c0 mm/slub.c:3264

CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================