================================================================== BUG: KASAN: slab-out-of-bounds in lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 Read of size 8 at addr ffff88807c781360 by task syz-executor.3/18807 CPU: 1 PID: 18807 Comm: syz-executor.3 Not tainted 6.3.0-rc4-next-20230330-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 lockdep_register_key+0x396/0x410 kernel/locking/lockdep.c:1231 wq_init_lockdep kernel/workqueue.c:3604 [inline] alloc_workqueue+0x3f8/0x1110 kernel/workqueue.c:4476 tipc_crypto_start+0x63e/0x9c0 net/tipc/crypto.c:1472 tipc_init_net+0x2df/0x440 net/tipc/core.c:72 ops_init+0xb9/0x6b0 net/core/net_namespace.c:136 setup_net+0x5d1/0xc50 net/core/net_namespace.c:339 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x449/0x920 kernel/fork.c:3357 __do_sys_unshare kernel/fork.c:3428 [inline] __se_sys_unshare kernel/fork.c:3426 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3426 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc5b468c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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:00007fc5b5463168 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fc5b47ac1f0 RCX: 00007fc5b468c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006c060000 RBP: 00007fc5b46e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc320f06af R14: 00007fc5b5463300 R15: 0000000000022000 Allocated by task 18799: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] fqdir_init+0x4f/0x1d0 net/ipv4/inet_fragment.c:189 ipv6_frags_init_net+0x2b/0x350 net/ipv6/reassembly.c:534 ops_init+0xb9/0x6b0 net/core/net_namespace.c:136 setup_net+0x5d1/0xc50 net/core/net_namespace.c:339 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x449/0x920 kernel/fork.c:3357 __do_sys_unshare kernel/fork.c:3428 [inline] __se_sys_unshare kernel/fork.c:3426 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3426 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807c781000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 288 bytes to the right of allocated 576-byte region [ffff88807c781000, ffff88807c781240) The buggy address belongs to the physical page: page:ffffea0001f1e000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7c780 head:ffffea0001f1e000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012441dc0 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11555, tgid 11551 (syz-executor.5), ts 672721118395, free_ts 671666881181 prep_new_page mm/page_alloc.c:1729 [inline] get_page_from_freelist+0xf75/0x2aa0 mm/page_alloc.c:3493 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node_track_caller+0x4f/0x1a0 mm/slab_common.c:986 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:535 __alloc_skb+0x129/0x330 net/core/skbuff.c:604 alloc_skb include/linux/skbuff.h:1269 [inline] nlmsg_new include/net/netlink.h:1003 [inline] inet6_rt_notify+0xf0/0x2b0 net/ipv6/route.c:6166 fib6_del_route net/ipv6/ip6_fib.c:1993 [inline] fib6_del+0xfbb/0x1670 net/ipv6/ip6_fib.c:2028 fib6_clean_node+0x39c/0x5c0 net/ipv6/ip6_fib.c:2190 fib6_walk_continue+0x487/0x8e0 net/ipv6/ip6_fib.c:2112 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2160 fib6_clean_tree+0xdb/0x120 net/ipv6/ip6_fib.c:2240 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x4d8/0xb80 mm/page_alloc.c:2555 free_unref_page+0x33/0x370 mm/page_alloc.c:2650 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x17c/0x320 mm/slub.c:3491 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:680 [inline] nf_nat_masq_schedule.part.0+0x2a6/0x630 net/netfilter/nf_nat_masquerade.c:118 nf_nat_masq_schedule net/netfilter/nf_nat_masquerade.c:108 [inline] masq_device_event+0xf5/0x120 net/netfilter/nf_nat_masquerade.c:162 notifier_call_chain+0xb6/0x3c0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937 call_netdevice_notifiers_extack net/core/dev.c:1975 [inline] call_netdevice_notifiers net/core/dev.c:1989 [inline] __dev_notify_flags+0x1ea/0x2d0 net/core/dev.c:8568 dev_change_flags+0x11b/0x170 net/core/dev.c:8604 do_setlink+0x9f4/0x3d30 net/core/rtnetlink.c:2836 rtnl_group_changelink net/core/rtnetlink.c:3380 [inline] __rtnl_newlink+0xb90/0x1840 net/core/rtnetlink.c:3636 Memory state around the buggy address: ffff88807c781200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff88807c781280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807c781300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807c781380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807c781400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================