==================================================================
BUG: KASAN: slab-use-after-free in netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
BUG: KASAN: slab-use-after-free in netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
BUG: KASAN: slab-use-after-free in __linkwatch_run_queue+0x775/0x8a0 net/core/link_watch.c:245
Read of size 1 at addr ffff888078496cc5 by task kworker/u8:2/36
CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: events_unbound linkwatch_event
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+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
__linkwatch_run_queue+0x775/0x8a0 net/core/link_watch.c:245
linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 15117:
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
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kvmalloc_node_noprof+0x279/0x600 mm/slub.c:5012
alloc_netdev_mqs+0xd2/0x1570 net/core/dev.c:11616
rtnl_create_link+0xc10/0xfa0 net/core/rtnetlink.c:3641
rtnl_newlink_create net/core/rtnetlink.c:3823 [inline]
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0xb69/0x2000 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6955
netlink_rcv_skb+0x16d/0x440 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+0x498/0x510 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/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 10455:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x2b6/0x4d0 mm/slub.c:4841
device_release+0xa4/0x240 drivers/base/core.c:2568
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e7/0x5a0 lib/kobject.c:737
netdev_run_todo+0x7e9/0x1320 net/core/dev.c:11317
default_device_exit_batch+0x858/0xaf0 net/core/dev.c:12539
ops_exit_list+0x12b/0x180 net/core/net_namespace.c:177
cleanup_net+0x5c1/0xb30 net/core/net_namespace.c:654
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff888078496000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 3269 bytes inside of
freed 4096-byte region [ffff888078496000, ffff888078497000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888078494000 pfn:0x78490
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880332bff01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b44b500 ffffea0001702200 0000000000000002
raw: ffff888078494000 0000000000040003 00000000f5000000 ffff8880332bff01
head: 00fff00000000040 ffff88801b44b500 ffffea0001702200 0000000000000002
head: ffff888078494000 0000000000040003 00000000f5000000 ffff8880332bff01
head: 00fff00000000003 ffffea0001e12401 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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 15230, tgid 15230 (syz-executor), ts 1340617580444, free_ts 1340581664088
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688
__alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4970
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x244/0x340 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]
__kvmalloc_node_noprof+0x3a6/0x600 mm/slub.c:5012
alloc_netdev_mqs+0xd2/0x1570 net/core/dev.c:11616
rtnl_create_link+0xc10/0xfa0 net/core/rtnetlink.c:3641
veth_newlink+0x1fc/0xa00 drivers/net/veth.c:1805
rtnl_newlink_create net/core/rtnetlink.c:3833 [inline]
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0xc45/0x2000 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6955
netlink_rcv_skb+0x16d/0x440 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
page last free pid 15233 tgid 15233 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2725
discard_slab mm/slub.c:2716 [inline]
__put_partials+0x16d/0x1c0 mm/slub.c:3185
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
kmem_cache_alloc_node_noprof+0x1d5/0x3b0 mm/slub.c:4248
__alloc_skb+0x2b2/0x380 net/core/skbuff.c:658
alloc_skb include/linux/skbuff.h:1340 [inline]
nlmsg_new include/net/netlink.h:1019 [inline]
rtmsg_ifinfo_build_skb+0x81/0x280 net/core/rtnetlink.c:4400
rtmsg_ifinfo_event net/core/rtnetlink.c:4442 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4432 [inline]
rtnetlink_event+0xf3/0x1f0 net/core/rtnetlink.c:7015
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2176
call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
call_netdevice_notifiers net/core/dev.c:2228 [inline]
netif_set_mac_address+0x378/0x4a0 net/core/dev.c:9601
dev_set_mac_address+0xba/0x250 net/core/dev_api.c:312
bond_enslave+0x9ab/0x6050 drivers/net/bonding/bond_main.c:2122
do_set_master+0x40f/0x730 net/core/rtnetlink.c:2946
do_setlink.constprop.0+0xe66/0x44b0 net/core/rtnetlink.c:3159
Memory state around the buggy address:
ffff888078496b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888078496c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888078496c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888078496d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888078496d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
BUG: KASAN: slab-use-after-free in netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
BUG: KASAN: slab-use-after-free in __linkwatch_run_queue+0x7d8/0x8a0 net/core/link_watch.c:245
Read of size 8 at addr ffff888078496b88 by task kworker/u8:2/36
CPU: 1 UID: 0 PID: 36 Comm: kworker/u8:2 Tainted: G B 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: events_unbound linkwatch_event
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+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
__linkwatch_run_queue+0x7d8/0x8a0 net/core/link_watch.c:245
linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 15117:
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
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kvmalloc_node_noprof+0x279/0x600 mm/slub.c:5012
alloc_netdev_mqs+0xd2/0x1570 net/core/dev.c:11616
rtnl_create_link+0xc10/0xfa0 net/core/rtnetlink.c:3641
rtnl_newlink_create net/core/rtnetlink.c:3823 [inline]
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0xb69/0x2000 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6955
netlink_rcv_skb+0x16d/0x440 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+0x498/0x510 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/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 10455:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x2b6/0x4d0 mm/slub.c:4841
device_release+0xa4/0x240 drivers/base/core.c:2568
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e7/0x5a0 lib/kobject.c:737
netdev_run_todo+0x7e9/0x1320 net/core/dev.c:11317
default_device_exit_batch+0x858/0xaf0 net/core/dev.c:12539
ops_exit_list+0x12b/0x180 net/core/net_namespace.c:177
cleanup_net+0x5c1/0xb30 net/core/net_namespace.c:654
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff888078496000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 2952 bytes inside of
freed 4096-byte region [ffff888078496000, ffff888078497000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888078494000 pfn:0x78490
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880332bff01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b44b500 ffffea0001702200 0000000000000002
raw: ffff888078494000 0000000000040003 00000000f5000000 ffff8880332bff01
head: 00fff00000000040 ffff88801b44b500 ffffea0001702200 0000000000000002
head: ffff888078494000 0000000000040003 00000000f5000000 ffff8880332bff01
head: 00fff00000000003 ffffea0001e12401 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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 15230, tgid 15230 (syz-executor), ts 1340617580444, free_ts 1340581664088
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688
__alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4970
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x244/0x340 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]
__kvmalloc_node_noprof+0x3a6/0x600 mm/slub.c:5012
alloc_netdev_mqs+0xd2/0x1570 net/core/dev.c:11616
rtnl_create_link+0xc10/0xfa0 net/core/rtnetlink.c:3641
veth_newlink+0x1fc/0xa00 drivers/net/veth.c:1805
rtnl_newlink_create net/core/rtnetlink.c:3833 [inline]
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0xc45/0x2000 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6955
netlink_rcv_skb+0x16d/0x440 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
page last free pid 15233 tgid 15233 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2725
discard_slab mm/slub.c:2716 [inline]
__put_partials+0x16d/0x1c0 mm/slub.c:3185
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
kmem_cache_alloc_node_noprof+0x1d5/0x3b0 mm/slub.c:4248
__alloc_skb+0x2b2/0x380 net/core/skbuff.c:658
alloc_skb include/linux/skbuff.h:1340 [inline]
nlmsg_new include/net/netlink.h:1019 [inline]
rtmsg_ifinfo_build_skb+0x81/0x280 net/core/rtnetlink.c:4400
rtmsg_ifinfo_event net/core/rtnetlink.c:4442 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4432 [inline]
rtnetlink_event+0xf3/0x1f0 net/core/rtnetlink.c:7015
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2176
call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
call_netdevice_notifiers net/core/dev.c:2228 [inline]
netif_set_mac_address+0x378/0x4a0 net/core/dev.c:9601
dev_set_mac_address+0xba/0x250 net/core/dev_api.c:312
bond_enslave+0x9ab/0x6050 drivers/net/bonding/bond_main.c:2122
do_set_master+0x40f/0x730 net/core/rtnetlink.c:2946
do_setlink.constprop.0+0xe66/0x44b0 net/core/rtnetlink.c:3159
Memory state around the buggy address:
ffff888078496a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888078496b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888078496b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888078496c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888078496c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]
BUG: KASAN: slab-use-after-free in netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
BUG: KASAN: slab-use-after-free in __linkwatch_run_queue+0x883/0x8a0 net/core/link_watch.c:245
Read of size 8 at addr ffff888078496008 by task kworker/u8:2/36
CPU: 1 UID: 0 PID: 36 Comm: kworker/u8:2 Tainted: G B 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: events_unbound linkwatch_event
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+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]
netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
__linkwatch_run_queue+0x883/0x8a0 net/core/link_watch.c:245
linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 15117:
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
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kvmalloc_node_noprof+0x279/0x600 mm/slub.c:5012
alloc_netdev_mqs+0xd2/0x1570 net/core/dev.c:11616
rtnl_create_link+0xc10/0xfa0 net/core/rtnetlink.c:3641
rtnl_newlink_create net/core/rtnetlink.c:3823 [inline]
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0xb69/0x2000 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6955
netlink_rcv_skb+0x16d/0x440 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+0x498/0x510 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/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 10455:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x2b6/0x4d0 mm/slub.c:4841
device_release+0xa4/0x240 drivers/base/core.c:2568
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1e7/0x5a0 lib/kobject.c:737
netdev_run_todo+0x7e9/0x1320 net/core/dev.c:11317
default_device_exit_batch+0x858/0xaf0 net/core/dev.c:12539
ops_exit_list+0x12b/0x180 net/core/net_namespace.c:177
cleanup_net+0x5c1/0xb30 net/core/net_namespace.c:654
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff888078496000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 8 bytes inside of
freed 4096-byte region [ffff888078496000, ffff888078497000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888078494000 pfn:0x78490
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880332bff01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b44b500 ffffea0001702200 0000000000000002
raw: ffff888078494000 0000000000040003 00000000f5000000 ffff8880332bff01
head: 00fff00000000040 ffff88801b44b500 ffffea0001702200 0000000000000002
head: ffff888078494000 0000000000040003 00000000f5000000 ffff8880332bff01
head: 00fff00000000003 ffffea0001e12401 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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 15230, tgid 15230 (syz-executor), ts 1340617580444, free_ts 1340581664088
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688
__alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4970
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab mm/slub.c:2618 [inline]
new_slab+0x244/0x340 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]
__kvmalloc_node_noprof+0x3a6/0x600 mm/slub.c:5012
alloc_netdev_mqs+0xd2/0x1570 net/core/dev.c:11616
rtnl_create_link+0xc10/0xfa0 net/core/rtnetlink.c:3641
veth_newlink+0x1fc/0xa00 drivers/net/veth.c:1805
rtnl_newlink_create net/core/rtnetlink.c:3833 [inline]
__rtnl_newlink net/core/rtnetlink.c:3950 [inline]
rtnl_newlink+0xc45/0x2000 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6955
netlink_rcv_skb+0x16d/0x440 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
page last free pid 15233 tgid 15233 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2725
discard_slab mm/slub.c:2716 [inline]
__put_partials+0x16d/0x1c0 mm/slub.c:3185
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
kmem_cache_alloc_node_noprof+0x1d5/0x3b0 mm/slub.c:4248
__alloc_skb+0x2b2/0x380 net/core/skbuff.c:658
alloc_skb include/linux/skbuff.h:1340 [inline]
nlmsg_new include/net/netlink.h:1019 [inline]
rtmsg_ifinfo_build_skb+0x81/0x280 net/core/rtnetlink.c:4400
rtmsg_ifinfo_event net/core/rtnetlink.c:4442 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4432 [inline]
rtnetlink_event+0xf3/0x1f0 net/core/rtnetlink.c:7015
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2176
call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
call_netdevice_notifiers net/core/dev.c:2228 [inline]
netif_set_mac_address+0x378/0x4a0 net/core/dev.c:9601
dev_set_mac_address+0xba/0x250 net/core/dev_api.c:312
bond_enslave+0x9ab/0x6050 drivers/net/bonding/bond_main.c:2122
do_set_master+0x40f/0x730 net/core/rtnetlink.c:2946
do_setlink.constprop.0+0xe66/0x44b0 net/core/rtnetlink.c:3159
Memory state around the buggy address:
ffff888078495f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888078495f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888078496000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888078496080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888078496100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Oops: general protection fault, probably for non-canonical address 0xe0fc3c5c6000056f: 0000 [#1] SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x07e202e300002b78-0x07e202e300002b7f]
CPU: 1 UID: 0 PID: 36 Comm: kworker/u8:2 Tainted: G B 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: events_unbound linkwatch_event
RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]
RIP: 0010:netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
RIP: 0010:__linkwatch_run_queue+0x654/0x8a0 net/core/link_watch.c:245
Code: 80 3c 02 00 0f 85 4a 02 00 00 4c 8b a3 68 f9 ff ff 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 a8 02 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 16 02 00 00 49 83 bc 24 a8 02 00 00 00 0f 84 ad
RSP: 0018:ffffc90000ad7b58 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: ffff8880784966a0 RCX: ffffffff817ad3af
RDX: 00fc405c6000056f RSI: ffffffff821f9457 RDI: 07e202e300002b7f
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 3d3d3d3d3d3d3d3d R12: 07e202e3000028d7
R13: 0000000000000061 R14: 0000000000000000 R15: ffffc90000ad7b98
FS: 0000000000000000(0000) GS:ffff888124ae5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8636dd4f98 CR3: 0000000030556000 CR4: 0000000000350ef0
Call Trace:
linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]
RIP: 0010:netdev_unlock_ops include/net/netdev_lock.h:47 [inline]
RIP: 0010:__linkwatch_run_queue+0x654/0x8a0 net/core/link_watch.c:245
Code: 80 3c 02 00 0f 85 4a 02 00 00 4c 8b a3 68 f9 ff ff 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 a8 02 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 16 02 00 00 49 83 bc 24 a8 02 00 00 00 0f 84 ad
RSP: 0018:ffffc90000ad7b58 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: ffff8880784966a0 RCX: ffffffff817ad3af
RDX: 00fc405c6000056f RSI: ffffffff821f9457 RDI: 07e202e300002b7f
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 3d3d3d3d3d3d3d3d R12: 07e202e3000028d7
R13: 0000000000000061 R14: 0000000000000000 R15: ffffc90000ad7b98
FS: 0000000000000000(0000) GS:ffff8881249e5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33f0aff8 CR3: 0000000034bd8000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
4: 0f 85 4a 02 00 00 jne 0x254
a: 4c 8b a3 68 f9 ff ff mov -0x698(%rbx),%r12
11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
18: fc ff df
1b: 49 8d bc 24 a8 02 00 lea 0x2a8(%r12),%rdi
22: 00
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 16 02 00 00 jne 0x24a
34: 49 83 bc 24 a8 02 00 cmpq $0x0,0x2a8(%r12)
3b: 00 00
3d: 0f .byte 0xf
3e: 84 .byte 0x84
3f: ad lods %ds:(%rsi),%eax