0x200000
__key.14+0x0/0x40
0x0
0x0
icmpv6_protocol+0x700/0xcc0
0x0
0x0
0x0
0x100000008
0x1
0x10003393c
0x10003393c
0x0
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668120 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Not tainted 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668128 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 8 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668130 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 16 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668138 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668140 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 32 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668148 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 40 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668150 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 48 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668158 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 56 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668160 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 64 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668168 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 25155:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x2b9/0xc10 net/ipv6/mcast.c:975
ipv6_add_dev+0xbbf/0x15f0 net/ipv6/addrconf.c:470
addrconf_notify+0x53e/0x19e0 net/ipv6/addrconf.c:3654
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
register_netdevice+0x182e/0x2270 net/core/dev.c:11142
rtnl_newlink_create net/core/rtnetlink.c:3825 [inline]
__rtnl_newlink net/core/rtnetlink.c:3940 [inline]
rtnl_newlink+0x1af0/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
__sys_sendto+0x4a3/0x520 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888054668000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 72 bytes to the right of
allocated 288-byte region [ffff888054668000, ffff888054668120)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805466bc00 pfn:0x54668
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
raw: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b441c80 ffffea00014fce10 ffffea000174b810
head: ffff88805466bc00 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001519a01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5833, tgid 5833 (syz-executor), ts 117153442030, free_ts 37804193309
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x23b/0x330 mm/slub.c:2672
___slab_alloc+0xd9c/0x1940 mm/slub.c:3858
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3948
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
fib6_info_alloc+0x40/0x160 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x14c/0x870 net/ipv6/route.c:3764
ip6_route_add+0x26/0x1d0 net/ipv6/route.c:3889
addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2487
addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3312
addrconf_addr_gen+0x36d/0x3c0 net/ipv6/addrconf.c:3441
addrconf_dev_config net/ipv6/addrconf.c:3487 [inline]
addrconf_init_auto_addrs+0x4b9/0x8f0 net/ipv6/addrconf.c:3571
addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3744
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__free_pages mm/page_alloc.c:5071 [inline]
free_contig_range+0x183/0x4b0 mm/page_alloc.c:6927
destroy_args+0x7f6/0xa60 mm/debug_vm_pgtable.c:1009
debug_vm_pgtable+0x13b8/0x2d00 mm/debug_vm_pgtable.c:1389
do_one_initcall+0x123/0x6e0 init/main.c:1273
do_initcall_level init/main.c:1335 [inline]
do_initcalls init/main.c:1351 [inline]
do_basic_setup init/main.c:1370 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1583
kernel_init+0x1c/0x2b0 init/main.c:1473
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888054668000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888054668080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888054668100: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888054668180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888054668200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
0x0
==================================================================
BUG: KASAN: slab-out-of-bounds in stack_trace_print kernel/stacktrace.c:33 [inline]
BUG: KASAN: slab-out-of-bounds in stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
Read of size 8 at addr ffff888054668170 by task kworker/u8:11/6189
CPU: 0 UID: 0 PID: 6189 Comm: kworker/u8:11 Tainted: G B 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
stack_trace_print kernel/stacktrace.c:33 [inline]
stack_trace_print+0x77/0x80 kernel/stacktrace.c:24
ref_tracker_free+0x6e8/0x830 lib/ref_tracker.c:252
netdev_tracker_free include/linux/netdevice.h:4361 [inline]
netdev_put include/linux/netdevice.h:4378 [inline]
netdev_put include/linux/netdevice.h:4374 [inline]
in_dev_finish_destroy+0xae/0x1d0 net/ipv4/devinet.c:258
in_dev_put include/linux/inetdevice.h:290 [inline]
inetdev_destroy net/ipv4/devinet.c:338 [inline]
inetdev_event+0xf8b/0x18a0 net/ipv4/devinet.c:1656
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:12076
unregister_netdevice_many net/core/dev.c:12139 [inline]
default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12643
ops_exit_list net/core/net_namespace.c:206 [inline]
ops_undo_list+0x363/0xab0 net/core/net_namespace.c:253
cleanup_net+0x408/0x890 net/core/net_namespace.c:686
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148