==================================================================
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_lock_ops include/net/netdev_lock.h:41 [inline]
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x230/0x250 net/ethtool/ioctl.c:463
Read of size 1 at addr ffff888035839011 by task kworker/1:1/37

CPU: 1 UID: 0 PID: 37 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
Workqueue: events smc_ib_port_event_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 netdev_need_ops_lock include/net/netdev_lock.h:30 [inline]
 netdev_lock_ops include/net/netdev_lock.h:41 [inline]
 __ethtool_get_link_ksettings+0x230/0x250 net/ethtool/ioctl.c:463
 __ethtool_get_link_ksettings+0x11f/0x250 net/ethtool/ioctl.c:464
 ib_get_eth_speed+0x180/0x800 drivers/infiniband/core/verbs.c:2052
 rxe_query_port+0x93/0x3e0 drivers/infiniband/sw/rxe/rxe_verbs.c:56
 __ib_query_port drivers/infiniband/core/device.c:2129 [inline]
 ib_query_port+0x16e/0x840 drivers/infiniband/core/device.c:2161
 smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
 smc_ib_port_event_work+0x15b/0x980 net/smc/smc_ib.c:388
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 6501:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5339 [inline]
 __kvmalloc_node_noprof+0x5ac/0x880 mm/slub.c:6916
 alloc_netdev_mqs+0xa9/0x1300 net/core/dev.c:12078
 rtnl_create_link+0x321/0xd70 net/core/rtnetlink.c:3757
 rtnl_newlink_create+0x258/0x7b0 net/core/rtnetlink.c:3939
 __rtnl_newlink net/core/rtnetlink.c:4078 [inline]
 rtnl_newlink+0x166d/0x1c30 net/core/rtnetlink.c:4195
 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7112
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x7f5/0x990 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:810
 __sock_sendmsg net/socket.c:825 [inline]
 __sys_sendto+0x41e/0x5d0 net/socket.c:2292
 __do_sys_sendto net/socket.c:2299 [inline]
 __se_sys_sendto net/socket.c:2295 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2295
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 13:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2706 [inline]
 slab_free mm/slub.c:6388 [inline]
 kfree+0x1c5/0x6c0 mm/slub.c:6703
 device_release+0xc4/0x1f0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x222/0x550 lib/kobject.c:737
 netdev_run_todo+0x1135/0x12b0 net/core/dev.c:11779
 default_device_exit_batch+0x923/0x9a0 net/core/dev.c:13253
 ops_exit_list net/core/net_namespace.c:206 [inline]
 ops_undo_list+0x4b4/0x8d0 net/core/net_namespace.c:253
 cleanup_net+0x575/0x810 net/core/net_namespace.c:706
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff888035838000
 which belongs to the cache kmalloc-cg-8k of size 8192
The buggy address is located 4113 bytes inside of
 freed 8192-byte region [ffff888035838000, ffff88803583a000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35838
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88803583a011
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88813fe54640 dead000000000122 0000000000000000
raw: 0000000000000000 0000400000020002 00000000f5000000 ffff88803583a011
head: 0080000000000040 ffff88813fe54640 dead000000000122 0000000000000000
head: 0000000000000000 0000400000020002 00000000f5000000 ffff88803583a011
head: 0080000000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 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 6501, tgid 6501 (syz-executor), ts 133952776744
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3955
 __alloc_frozen_pages_noprof+0x222/0x5b0 mm/page_alloc.c:5394
 alloc_slab_page mm/slub.c:3295 [inline]
 allocate_slab+0x7c/0x5e0 mm/slub.c:3410
 new_slab mm/slub.c:3456 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7321
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 __do_kmalloc_node mm/slub.c:5338 [inline]
 __kvmalloc_node_noprof+0x6ec/0x880 mm/slub.c:6916
 alloc_netdev_mqs+0xa9/0x1300 net/core/dev.c:12078
 rtnl_create_link+0x321/0xd70 net/core/rtnetlink.c:3757
 veth_newlink+0x277/0xe00 drivers/net/veth.c:1851
 rtnl_newlink_create+0x305/0x7b0 net/core/rtnetlink.c:3949
 __rtnl_newlink net/core/rtnetlink.c:4078 [inline]
 rtnl_newlink+0x166d/0x1c30 net/core/rtnetlink.c:4195
 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7112
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x7f5/0x990 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900
page last free pid 6501 tgid 6501 ts 133915413359 stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0x1185/0x1270 mm/page_alloc.c:2962
 __slab_free+0x252/0x2a0 mm/slub.c:5738
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4608 [inline]
 slab_alloc_node mm/slub.c:4921 [inline]
 __kmalloc_cache_noprof+0x34b/0x670 mm/slub.c:5482
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 __netdev_adjacent_dev_insert+0x16f/0xa30 net/core/dev.c:8757
 __netdev_adjacent_dev_link_lists net/core/dev.c:8849 [inline]
 __netdev_adjacent_dev_link_neighbour net/core/dev.c:8878 [inline]
 __netdev_upper_dev_link+0xa33/0xc90 net/core/dev.c:8938
 netdev_master_upper_dev_link+0xbc/0x110 net/core/dev.c:9013
 bond_master_upper_dev_link+0x1a8/0x2b0 drivers/net/bonding/bond_main.c:1717
 bond_enslave+0x1f65/0x3b70 drivers/net/bonding/bond_main.c:2241
 do_set_master+0x563/0x720 net/core/rtnetlink.c:3051
 do_setlink+0xe7b/0x4670 net/core/rtnetlink.c:3253
 rtnl_changelink net/core/rtnetlink.c:3885 [inline]
 __rtnl_newlink net/core/rtnetlink.c:4056 [inline]
 rtnl_newlink+0x15a3/0x1c30 net/core/rtnetlink.c:4195
 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7112
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556

Memory state around the buggy address:
 ffff888035838f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888035838f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888035839000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff888035839080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888035839100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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