==================================================================
BUG: KASAN: slab-use-after-free in irq_can_move_pcntxt kernel/irq/internals.h:328 [inline]
BUG: KASAN: slab-use-after-free in migrate_one_irq kernel/irq/cpuhotplug.c:57 [inline]
BUG: KASAN: slab-use-after-free in irq_migrate_all_off_this_cpu+0xaaf/0xc30 kernel/irq/cpuhotplug.c:181
Read of size 8 at addr ffff88801452d1a8 by task migration/1/27

CPU: 1 UID: 0 PID: 27 Comm: migration/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Stopper: multi_cpu_stop+0x0/0x4b0 kernel/stop_machine.c:199 <- __stop_cpus.constprop.0+0xb1/0x140
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
 irq_can_move_pcntxt kernel/irq/internals.h:328 [inline]
 migrate_one_irq kernel/irq/cpuhotplug.c:57 [inline]
 irq_migrate_all_off_this_cpu+0xaaf/0xc30 kernel/irq/cpuhotplug.c:181
 fixup_irqs+0x2b/0x280 arch/x86/kernel/irq.c:474
 cpu_disable_common arch/x86/kernel/smpboot.c:1371 [inline]
 native_cpu_disable+0x59/0x80 arch/x86/kernel/smpboot.c:1383
 __cpu_disable arch/x86/include/asm/smp.h:73 [inline]
 take_cpu_down+0xb6/0x190 kernel/cpu.c:1282
 multi_cpu_stop+0x16a/0x4b0 kernel/stop_machine.c:239
 cpu_stopper_thread+0x21e/0x450 kernel/stop_machine.c:510
 smpboot_thread_fn+0x3d3/0xab0 kernel/smpboot.c:160
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 13:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5414 [inline]
 __kmalloc_node_track_caller_noprof+0x33d/0x870 mm/slub.c:5545
 kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637
 pskb_expand_head+0x249/0x10e0 net/core/skbuff.c:2312
 __skb_cow include/linux/skbuff.h:3880 [inline]
 skb_cow_head include/linux/skbuff.h:3914 [inline]
 batadv_skb_head_push+0xec/0x280 net/batman-adv/mesh-interface.c:78
 batadv_send_skb_packet+0xe9/0x6e0 net/batman-adv/send.c:81
 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:466 [inline]
 batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:491 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x6a2/0x7d0 net/batman-adv/bat_iv_ogm.c:1912
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
 process_scheduled_works kernel/workqueue.c:3470 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 13:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2748 [inline]
 slab_free mm/slub.c:6499 [inline]
 kfree+0x22b/0x6d0 mm/slub.c:6792
 skb_kfree_head net/core/skbuff.c:1083 [inline]
 skb_free_head+0xb9/0x160 net/core/skbuff.c:1095
 skb_release_data+0x6c5/0x8e0 net/core/skbuff.c:1122
 skb_release_all net/core/skbuff.c:1197 [inline]
 __kfree_skb net/core/skbuff.c:1211 [inline]
 sk_skb_reason_drop+0x102/0x1b0 net/core/skbuff.c:1250
 kfree_skb_reason include/linux/skbuff.h:1323 [inline]
 __netif_receive_skb_core.constprop.0+0x571/0x3530 net/core/dev.c:6238
 __netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6262
 __netif_receive_skb+0x1f/0x120 net/core/dev.c:6377
 process_backlog+0x487/0x1600 net/core/dev.c:6728
 __napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7787
 napi_poll net/core/dev.c:7850 [inline]
 net_rx_action+0xa40/0xf20 net/core/dev.c:8007
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 do_softirq kernel/softirq.c:546 [inline]
 do_softirq+0xaf/0xf0 kernel/softirq.c:533
 __local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline]
 __dev_queue_xmit+0xa27/0x4970 net/core/dev.c:4961
 dev_queue_xmit include/linux/netdevice.h:3461 [inline]
 batadv_send_skb_packet+0x53a/0x6e0 net/batman-adv/send.c:100
 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:466 [inline]
 batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:491 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x6a2/0x7d0 net/batman-adv/bat_iv_ogm.c:1912
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
 process_scheduled_works kernel/workqueue.c:3470 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88801452d000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 424 bytes inside of
 freed 1024-byte region [ffff88801452d000, ffff88801452d400)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14528
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801c042dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801c042dc0 dead000000000100 dead000000000122
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5784, tgid 5784 (kworker/u32:2), ts 48721988123
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x110d/0x35b0 mm/page_alloc.c:3943
 __alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
 alloc_slab_page mm/slub.c:3347 [inline]
 allocate_slab mm/slub.c:3462 [inline]
 new_slab+0xa9/0x6e0 mm/slub.c:3513
 refill_objects+0xe3/0x410 mm/slub.c:7410
 refill_sheaf mm/slub.c:2885 [inline]
 __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774
 alloc_from_pcs mm/slub.c:4850 [inline]
 slab_alloc_node mm/slub.c:4984 [inline]
 __do_kmalloc_node mm/slub.c:5413 [inline]
 __kmalloc_noprof+0x67c/0x840 mm/slub.c:5439
 _kmalloc_noprof include/linux/slab.h:995 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 neigh_alloc net/core/neighbour.c:518 [inline]
 ___neigh_create+0x1532/0x2940 net/core/neighbour.c:652
 ip6_finish_output2+0x1052/0x1d50 net/ipv6/ip6_output.c:130
 __ip6_finish_output+0x357/0xdf0 net/ipv6/ip6_output.c:210
 ip6_finish_output net/ipv6/ip6_output.c:221 [inline]
 NF_HOOK_COND include/linux/netfilter.h:314 [inline]
 ip6_output+0x2aa/0xa60 net/ipv6/ip6_output.c:248
 dst_output include/net/dst.h:470 [inline]
 NF_HOOK include/linux/netfilter.h:325 [inline]
 ndisc_send_skb+0xa85/0x1bf0 net/ipv6/ndisc.c:513
 ndisc_send_rs+0x129/0x680 net/ipv6/ndisc.c:724
 addrconf_dad_completed+0x47f/0xff0 net/ipv6/addrconf.c:4396
 addrconf_dad_begin net/ipv6/addrconf.c:4158 [inline]
 addrconf_dad_work+0xb1e/0x1360 net/ipv6/addrconf.c:4263
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387
page last free pid 5732 tgid 5732 ts 48631579075 stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4683 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 __kmalloc_cache_noprof+0x278/0x6d0 mm/slub.c:5559
 _kmalloc_noprof include/linux/slab.h:991 [inline]
 netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:663 [inline]
 netdevice_event+0x308/0x9a0 drivers/infiniband/core/roce_gid_mgmt.c:822
 notifier_call_chain+0x99/0x3f0 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x110 net/core/dev.c:2275
 call_netdevice_notifiers_extack net/core/dev.c:2313 [inline]
 call_netdevice_notifiers net/core/dev.c:2327 [inline]
 __dev_notify_flags+0x22c/0x4b0 net/core/dev.c:9853
 netif_change_flags+0x108/0x160 net/core/dev.c:9882
 do_setlink.isra.0+0x1ac4/0x3e60 net/core/rtnetlink.c:3266
 rtnl_changelink net/core/rtnetlink.c:3905 [inline]
 __rtnl_newlink net/core/rtnetlink.c:4076 [inline]
 rtnl_newlink+0x13c1/0x2620 net/core/rtnetlink.c:4215
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7132
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900

Memory state around the buggy address:
 ffff88801452d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801452d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801452d180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88801452d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88801452d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================