bond0 (unregistering): (slave bond_slave_1): Releasing backup interface bond0 (unregistering): Released all slaves rxrpc: Leaked peer 36c {1} 127.0.0.1:7003 ================================================================== BUG: KASAN: slab-use-after-free in rxrpc_destroy_all_peers+0x1ce/0x1d0 net/rxrpc/peer_object.c:461 Read of size 8 at addr ffff88807ee5e020 by task kworker/u8:4/57 CPU: 0 UID: 0 PID: 57 Comm: kworker/u8:4 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 rxrpc_destroy_all_peers+0x1ce/0x1d0 net/rxrpc/peer_object.c:461 rxrpc_exit_net+0x83/0xc0 net/rxrpc/net_ns.c:114 ops_exit_list net/core/net_namespace.c:199 [inline] ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:252 cleanup_net+0x499/0x920 net/core/net_namespace.c:702 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 13544: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2e5/0x6c0 mm/slub.c:5489 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] rxrpc_alloc_peer+0xa7/0x400 net/rxrpc/peer_object.c:229 rxrpc_create_peer net/rxrpc/peer_object.c:293 [inline] rxrpc_lookup_peer+0x168/0x680 net/rxrpc/peer_object.c:354 rxrpc_kernel_lookup_peer+0xa8/0xe0 net/rxrpc/af_rxrpc.c:285 afs_merge_fs_addr4+0x1cd/0x4c0 fs/afs/addr_list.c:300 afs_parse_text_addrs+0x655/0xa10 fs/afs/addr_list.c:220 afs_alloc_cell fs/afs/cell.c:181 [inline] afs_lookup_cell+0xbb6/0x1940 fs/afs/cell.c:273 afs_proc_cells_write+0x2a3/0x3a0 fs/afs/proc.c:125 proc_simple_write+0x10e/0x1a0 fs/proc/generic.c:843 pde_write fs/proc/inode.c:330 [inline] proc_reg_write+0x240/0x330 fs/proc/inode.c:342 vfs_write+0x2aa/0x1050 fs/read_write.c:685 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 16455: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2677 [inline] __rcu_free_sheaf_prepare+0x5d/0x2f0 mm/slub.c:2928 rcu_free_sheaf+0x1a/0xe0 mm/slub.c:5978 rcu_do_batch kernel/rcu/tree.c:2645 [inline] rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2897 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622 do_softirq kernel/softirq.c:523 [inline] do_softirq+0xac/0xe0 kernel/softirq.c:510 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] __alloc_skb+0x5db/0x710 net/core/skbuff.c:699 alloc_skb include/linux/skbuff.h:1384 [inline] alloc_uevent_skb+0x7d/0x210 lib/kobject_uevent.c:289 uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline] kobject_uevent_env+0xd2d/0x18b0 lib/kobject_uevent.c:611 nfs_netns_sysfs_setup+0x173/0x200 fs/nfs/sysfs.c:207 nfs_net_init+0x10a/0x340 fs/nfs/inode.c:2633 ops_init+0x1e2/0x5f0 net/core/net_namespace.c:137 setup_net+0x118/0x3a0 net/core/net_namespace.c:446 copy_net_ns+0x46f/0x7c0 net/core/net_namespace.c:579 create_new_namespaces+0x3ea/0xac0 kernel/nsproxy.c:132 unshare_nsproxy_namespaces+0xf2/0x220 kernel/nsproxy.c:234 ksys_unshare+0x438/0xab0 kernel/fork.c:3269 __do_sys_unshare kernel/fork.c:3343 [inline] __se_sys_unshare kernel/fork.c:3341 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3341 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807ee5e000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 32 bytes inside of freed 512-byte region [ffff88807ee5e000, ffff88807ee5e200) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ee5c head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88813fe23c80 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88813fe23c80 dead000000000100 dead000000000122 head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000 head: 00fff00000000002 ffffffffffffff01 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5823, tgid 5823 (kworker/0:8), ts 441213310912, free_ts 415419720353 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3266 [inline] allocate_slab mm/slub.c:3380 [inline] new_slab+0xa2/0x640 mm/slub.c:3426 refill_objects+0xe3/0x410 mm/slub.c:7310 refill_sheaf mm/slub.c:2804 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4675 alloc_from_pcs mm/slub.c:4773 [inline] slab_alloc_node mm/slub.c:4905 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_noprof+0x66d/0x820 mm/slub.c:5359 _kmalloc_noprof include/linux/slab.h:992 [inline] switchdev_deferred_enqueue+0x3e/0x2d0 net/switchdev/switchdev.c:117 switchdev_port_obj_add_defer net/switchdev/switchdev.c:358 [inline] switchdev_port_obj_add+0xfb/0x160 net/switchdev/switchdev.c:377 br_switchdev_host_mdb_one net/bridge/br_switchdev.c:581 [inline] br_switchdev_host_mdb+0x2e1/0x3a0 net/bridge/br_switchdev.c:596 br_switchdev_mdb_notify+0x4b9/0x570 net/bridge/br_switchdev.c:671 __br_mdb_notify+0x5c4/0x830 net/bridge/br_mdb.c:532 br_multicast_host_join+0x21c/0x360 net/bridge/br_multicast.c:1478 __br_multicast_add_group+0x4ba/0x570 net/bridge/br_multicast.c:1521 br_multicast_add_group net/bridge/br_multicast.c:1565 [inline] br_ip6_multicast_add_group+0x286/0x330 net/bridge/br_multicast.c:1617 br_ip6_multicast_mld2_report net/bridge/br_multicast.c:3038 [inline] br_multicast_ipv6_rcv net/bridge/br_multicast.c:3978 [inline] br_multicast_rcv+0x21bc/0x6a20 net/bridge/br_multicast.c:4036 page last free pid 9869 tgid 9869 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4584 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x26b/0x6a0 mm/slub.c:4931 alloc_filename fs/namei.c:147 [inline] do_getname+0x35/0x390 fs/namei.c:187 class_filename_uflags_constructor include/linux/fs.h:2567 [inline] do_faccessat+0x115/0xc10 fs/open.c:486 __do_sys_faccessat2 fs/open.c:542 [inline] __se_sys_faccessat2 fs/open.c:539 [inline] __x64_sys_faccessat2+0x96/0x100 fs/open.c:539 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88807ee5df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807ee5df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807ee5e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807ee5e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807ee5e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================