================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x66/0x100 lib/list_debug.c:30 Read of size 8 at addr ffff88807d42a5c8 by task syz-executor.3/4025 CPU: 0 PID: 4025 Comm: syz-executor.3 Not tainted 6.1.0-rc1-syzkaller-00093-g6d36c728bc2e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x220 mm/kasan/report.c:395 kasan_report+0x139/0x170 mm/kasan/report.c:495 __list_add_valid+0x66/0x100 lib/list_debug.c:30 __list_add include/linux/list.h:69 [inline] list_add_tail include/linux/list.h:102 [inline] register_shrinker_prepared mm/vmscan.c:695 [inline] __register_shrinker mm/vmscan.c:707 [inline] register_shrinker+0x147/0x290 mm/vmscan.c:733 nfsd4_init_leases_net+0x33c/0x4c0 fs/nfsd/nfs4state.c:4393 nfsd_init_net+0x76/0x190 fs/nfsd/nfsctl.c:1456 ops_init+0x313/0x430 net/core/net_namespace.c:134 setup_net+0x4bb/0xc10 net/core/net_namespace.c:325 copy_net_ns+0x359/0x5b0 net/core/net_namespace.c:471 create_new_namespaces+0x4db/0x8e0 kernel/nsproxy.c:110 copy_namespaces+0x333/0x390 kernel/nsproxy.c:178 copy_process+0x1a55/0x3fc0 kernel/fork.c:2256 kernel_clone+0x227/0x640 kernel/fork.c:2671 __do_sys_clone3 kernel/fork.c:2970 [inline] __se_sys_clone3+0x372/0x410 kernel/fork.c:2954 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcc36a8b5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc37be0038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fcc36bac120 RCX: 00007fcc36a8b5a9 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00007fcc37be0050 RBP: 00007fcc36ae6580 R08: 0000000000000000 R09: 0000000000000058 R10: 00007fcc37be0050 R11: 0000000000000246 R12: 0000000000000058 R13: 00007ffca6eca95f R14: 00007fcc37be0300 R15: 0000000000022000 Allocated by task 4011: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc+0xaf/0x1a0 mm/slab_common.c:968 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:712 [inline] ops_init+0x85/0x430 net/core/net_namespace.c:124 setup_net+0x4bb/0xc10 net/core/net_namespace.c:325 copy_net_ns+0x359/0x5b0 net/core/net_namespace.c:471 create_new_namespaces+0x4db/0x8e0 kernel/nsproxy.c:110 copy_namespaces+0x333/0x390 kernel/nsproxy.c:178 copy_process+0x1a55/0x3fc0 kernel/fork.c:2256 kernel_clone+0x227/0x640 kernel/fork.c:2671 __do_sys_clone3 kernel/fork.c:2970 [inline] __se_sys_clone3+0x372/0x410 kernel/fork.c:2954 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 4011: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:511 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3674 ops_init+0x333/0x430 net/core/net_namespace.c:139 setup_net+0x4bb/0xc10 net/core/net_namespace.c:325 copy_net_ns+0x359/0x5b0 net/core/net_namespace.c:471 create_new_namespaces+0x4db/0x8e0 kernel/nsproxy.c:110 copy_namespaces+0x333/0x390 kernel/nsproxy.c:178 copy_process+0x1a55/0x3fc0 kernel/fork.c:2256 kernel_clone+0x227/0x640 kernel/fork.c:2671 __do_sys_clone3 kernel/fork.c:2970 [inline] __se_sys_clone3+0x372/0x410 kernel/fork.c:2954 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807d42a000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1480 bytes inside of 2048-byte region [ffff88807d42a000, ffff88807d42a800) The buggy address belongs to the physical page: page:ffffea0001f50a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d428 head:ffffea0001f50a00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888012042000 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3682, tgid 3682 (kworker/0:5), ts 273835561253, free_ts 273791379317 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4287 __alloc_pages+0x259/0x560 mm/page_alloc.c:5554 alloc_slab_page+0x70/0xf0 mm/slub.c:1794 allocate_slab+0x5e/0x4b0 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node_track_caller+0x9c/0x1a0 mm/slab_common.c:975 kmalloc_reserve net/core/skbuff.c:437 [inline] __alloc_skb+0x11d/0x620 net/core/skbuff.c:509 alloc_skb include/linux/skbuff.h:1267 [inline] nlmsg_new include/net/netlink.h:964 [inline] inet6_ifinfo_notify+0x69/0x110 net/ipv6/addrconf.c:6047 addrconf_notify+0xcda/0xfe0 net/ipv6/addrconf.c:3657 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] netdev_state_change+0x1ba/0x280 net/core/dev.c:1334 linkwatch_do_dev+0x10a/0x160 net/core/link_watch.c:168 __linkwatch_run_queue+0x474/0x730 net/core/link_watch.c:221 linkwatch_event+0x48/0x50 net/core/link_watch.c:264 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1458 [inline] free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1508 free_unref_page_prepare mm/page_alloc.c:3386 [inline] free_unref_page+0x7d/0x630 mm/page_alloc.c:3482 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x1d7/0x310 mm/slub.c:3437 kmalloc_trace+0x26/0x60 mm/slab_common.c:1046 kmalloc include/linux/slab.h:576 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:643 [inline] netdevice_event+0x39c/0x9c0 drivers/infiniband/core/roce_gid_mgmt.c:802 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] dev_set_mac_address+0x31d/0x470 net/core/dev.c:8803 dev_set_mac_address_user+0x2d/0x50 net/core/dev.c:8817 do_setlink+0x8fc/0x3f10 net/core/rtnetlink.c:2736 __rtnl_newlink net/core/rtnetlink.c:3547 [inline] rtnl_newlink+0x183e/0x2060 net/core/rtnetlink.c:3594 rtnetlink_rcv_msg+0x7b8/0xe90 net/core/rtnetlink.c:6091 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2540 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 Memory state around the buggy address: ffff88807d42a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d42a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807d42a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807d42a600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d42a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================