[syzbot] [net?] KASAN: slab-use-after-free Read in macvlan_forward_source
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syzbot
Jan 8, 2026, 8:32:26 AM (23 hours ago) Jan 8
to andrew...@lunn.ch, da...@davemloft.net, edum...@google.com, ku...@kernel.org, linux-...@vger.kernel.org, net...@vger.kernel.org, pab...@redhat.com, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 94909c53e442 Merge branch 'hsr-send-correct-hsrv0-supervis..
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=14e1c914580000
kernel config: https://syzkaller.appspot.com/x/.config?x=e46b8a1c645465a9
dashboard link: https://syzkaller.appspot.com/bug?extid=7182fbe91e58602ec1fe
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a204397b7264/disk-94909c53.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8433b628eb0c/vmlinux-94909c53.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8c6d98cf6bab/bzImage-94909c53.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7182fb...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in macvlan_forward_source+0x512/0x630 drivers/net/macvlan.c:436
Read of size 2 at addr ffff888030edadfc by task ksoftirqd/0/15
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
macvlan_forward_source+0x512/0x630 drivers/net/macvlan.c:436
macvlan_handle_frame+0x2e2/0x12e0 drivers/net/macvlan.c:471
__netif_receive_skb_core+0x10b9/0x4380 net/core/dev.c:5966
__netif_receive_skb_one_core net/core/dev.c:6077 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6192
process_backlog+0x60e/0x14f0 net/core/dev.c:6544
__napi_poll+0xc7/0x360 net/core/dev.c:7594
napi_poll net/core/dev.c:7657 [inline]
net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784
handle_softirqs+0x286/0x870 kernel/softirq.c:622
run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1063
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 8954:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417
kasan_kmalloc include/linux/kasan.h:262 [inline]
__do_kmalloc_node mm/slub.c:5642 [inline]
__kvmalloc_node_noprof+0x5cd/0x910 mm/slub.c:7100
alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11900
rtnl_create_link+0x31f/0xd10 net/core/rtnetlink.c:3641
rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3823
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0x16e4/0x1c80 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6951
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x830 net/socket.c:2630
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684
__sys_sendmsg net/socket.c:2716 [inline]
__do_sys_sendmsg net/socket.c:2721 [inline]
__se_sys_sendmsg net/socket.c:2719 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 8954:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
__kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2539 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x19a/0x6d0 mm/slub.c:6837
rtnl_newlink_create+0x373/0xb00 net/core/rtnetlink.c:3837
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0x16e4/0x1c80 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6951
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x830 net/socket.c:2630
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684
__sys_sendmsg net/socket.c:2716 [inline]
__do_sys_sendmsg net/socket.c:2721 [inline]
__se_sys_sendmsg net/socket.c:2719 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888030eda000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 3580 bytes inside of
freed 4096-byte region [ffff888030eda000, ffff888030edb000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x30ed8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88807bdef5c1
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a030500 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88807bdef5c1
head: 00fff00000000040 ffff88801a030500 0000000000000000 dead000000000001
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88807bdef5c1
head: 00fff00000000003 ffffea0000c3b601 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7588, tgid 7586 (syz.3.619), ts 114560949545, free_ts 114289273993
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3055 [inline]
allocate_slab+0x96/0x350 mm/slub.c:3228
new_slab mm/slub.c:3282 [inline]
___slab_alloc+0xe94/0x18a0 mm/slub.c:4651
__slab_alloc+0x65/0x100 mm/slub.c:4770
__slab_alloc_node mm/slub.c:4846 [inline]
slab_alloc_node mm/slub.c:5268 [inline]
__do_kmalloc_node mm/slub.c:5641 [inline]
__kmalloc_noprof+0x471/0x7f0 mm/slub.c:5654
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
__register_sysctl_table+0x72/0x1340 fs/proc/proc_sysctl.c:1379
__addrconf_sysctl_register+0x328/0x4c0 net/ipv6/addrconf.c:7323
addrconf_sysctl_register+0x168/0x1c0 net/ipv6/addrconf.c:7371
ipv6_add_dev+0xd46/0x1370 net/ipv6/addrconf.c:460
addrconf_notify+0x794/0x1010 net/ipv6/addrconf.c:3650
notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
call_netdevice_notifiers net/core/dev.c:2281 [inline]
register_netdevice+0x1608/0x1ae0 net/core/dev.c:11332
register_vlan_dev+0x39e/0x820 net/8021q/vlan.c:179
page last free pid 89 tgid 89 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906
discard_slab mm/slub.c:3326 [inline]
__put_partials+0x146/0x170 mm/slub.c:3872
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3947
__slab_free+0x2b9/0x390 mm/slub.c:5921
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4970 [inline]
slab_alloc_node mm/slub.c:5280 [inline]
__kmalloc_cache_noprof+0x36f/0x6f0 mm/slub.c:5758
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
nsim_fib6_rt_create drivers/net/netdevsim/fib.c:547 [inline]
nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline]
nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline]
nsim_fib_event+0xca1/0x8a30 drivers/net/netdevsim/fib.c:889
nsim_fib_event_work+0x249/0x3b0 drivers/net/netdevsim/fib.c:1493
process_one_work kernel/workqueue.c:3263 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888030edac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888030edad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888030edad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888030edae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888030edae80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 94909c53e442 Merge branch 'hsr-send-correct-hsrv0-supervis..
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=14e1c914580000
kernel config: https://syzkaller.appspot.com/x/.config?x=e46b8a1c645465a9
dashboard link: https://syzkaller.appspot.com/bug?extid=7182fbe91e58602ec1fe
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a204397b7264/disk-94909c53.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8433b628eb0c/vmlinux-94909c53.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8c6d98cf6bab/bzImage-94909c53.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7182fb...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in macvlan_forward_source+0x512/0x630 drivers/net/macvlan.c:436
Read of size 2 at addr ffff888030edadfc by task ksoftirqd/0/15
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
macvlan_forward_source+0x512/0x630 drivers/net/macvlan.c:436
macvlan_handle_frame+0x2e2/0x12e0 drivers/net/macvlan.c:471
__netif_receive_skb_core+0x10b9/0x4380 net/core/dev.c:5966
__netif_receive_skb_one_core net/core/dev.c:6077 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6192
process_backlog+0x60e/0x14f0 net/core/dev.c:6544
__napi_poll+0xc7/0x360 net/core/dev.c:7594
napi_poll net/core/dev.c:7657 [inline]
net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784
handle_softirqs+0x286/0x870 kernel/softirq.c:622
run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1063
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 8954:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417
kasan_kmalloc include/linux/kasan.h:262 [inline]
__do_kmalloc_node mm/slub.c:5642 [inline]
__kvmalloc_node_noprof+0x5cd/0x910 mm/slub.c:7100
alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11900
rtnl_create_link+0x31f/0xd10 net/core/rtnetlink.c:3641
rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3823
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0x16e4/0x1c80 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6951
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x830 net/socket.c:2630
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684
__sys_sendmsg net/socket.c:2716 [inline]
__do_sys_sendmsg net/socket.c:2721 [inline]
__se_sys_sendmsg net/socket.c:2719 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 8954:
kasan_save_stack mm/kasan/common.c:56 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
__kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2539 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x19a/0x6d0 mm/slub.c:6837
rtnl_newlink_create+0x373/0xb00 net/core/rtnetlink.c:3837
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0x16e4/0x1c80 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6951
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:742
____sys_sendmsg+0x505/0x830 net/socket.c:2630
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684
__sys_sendmsg net/socket.c:2716 [inline]
__do_sys_sendmsg net/socket.c:2721 [inline]
__se_sys_sendmsg net/socket.c:2719 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888030eda000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 3580 bytes inside of
freed 4096-byte region [ffff888030eda000, ffff888030edb000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x30ed8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88807bdef5c1
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a030500 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88807bdef5c1
head: 00fff00000000040 ffff88801a030500 0000000000000000 dead000000000001
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88807bdef5c1
head: 00fff00000000003 ffffea0000c3b601 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7588, tgid 7586 (syz.3.619), ts 114560949545, free_ts 114289273993
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3055 [inline]
allocate_slab+0x96/0x350 mm/slub.c:3228
new_slab mm/slub.c:3282 [inline]
___slab_alloc+0xe94/0x18a0 mm/slub.c:4651
__slab_alloc+0x65/0x100 mm/slub.c:4770
__slab_alloc_node mm/slub.c:4846 [inline]
slab_alloc_node mm/slub.c:5268 [inline]
__do_kmalloc_node mm/slub.c:5641 [inline]
__kmalloc_noprof+0x471/0x7f0 mm/slub.c:5654
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
__register_sysctl_table+0x72/0x1340 fs/proc/proc_sysctl.c:1379
__addrconf_sysctl_register+0x328/0x4c0 net/ipv6/addrconf.c:7323
addrconf_sysctl_register+0x168/0x1c0 net/ipv6/addrconf.c:7371
ipv6_add_dev+0xd46/0x1370 net/ipv6/addrconf.c:460
addrconf_notify+0x794/0x1010 net/ipv6/addrconf.c:3650
notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
call_netdevice_notifiers net/core/dev.c:2281 [inline]
register_netdevice+0x1608/0x1ae0 net/core/dev.c:11332
register_vlan_dev+0x39e/0x820 net/8021q/vlan.c:179
page last free pid 89 tgid 89 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906
discard_slab mm/slub.c:3326 [inline]
__put_partials+0x146/0x170 mm/slub.c:3872
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3947
__slab_free+0x2b9/0x390 mm/slub.c:5921
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4970 [inline]
slab_alloc_node mm/slub.c:5280 [inline]
__kmalloc_cache_noprof+0x36f/0x6f0 mm/slub.c:5758
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
nsim_fib6_rt_create drivers/net/netdevsim/fib.c:547 [inline]
nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline]
nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline]
nsim_fib_event+0xca1/0x8a30 drivers/net/netdevsim/fib.c:889
nsim_fib_event_work+0x249/0x3b0 drivers/net/netdevsim/fib.c:1493
process_one_work kernel/workqueue.c:3263 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888030edac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888030edad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888030edad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888030edae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888030edae80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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