================================================================== BUG: KASAN: slab-use-after-free in rht_key_hashfn include/linux/rhashtable.h:159 [inline] BUG: KASAN: slab-use-after-free in __rhashtable_lookup include/linux/rhashtable.h:604 [inline] BUG: KASAN: slab-use-after-free in rhashtable_lookup include/linux/rhashtable.h:646 [inline] BUG: KASAN: slab-use-after-free in rhashtable_lookup_fast+0x77a/0x9b0 include/linux/rhashtable.h:672 Read of size 4 at addr ffff888017f78008 by task ksoftirqd/0/16 CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.10.0-rc2-syzkaller-00761-g3ec8d7572a69 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 rht_key_hashfn include/linux/rhashtable.h:159 [inline] __rhashtable_lookup include/linux/rhashtable.h:604 [inline] rhashtable_lookup include/linux/rhashtable.h:646 [inline] rhashtable_lookup_fast+0x77a/0x9b0 include/linux/rhashtable.h:672 ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:132 [inline] ila_xlat_addr net/ipv6/ila/ila_xlat.c:652 [inline] ila_nf_input+0x1fe/0x3c0 net/ipv6/ila/ila_xlat.c:190 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312 __netif_receive_skb_one_core net/core/dev.c:5625 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5739 process_backlog+0x391/0x7d0 net/core/dev.c:6068 __napi_poll+0xcb/0x490 net/core/dev.c:6722 napi_poll net/core/dev.c:6791 [inline] net_rx_action+0x7bb/0x10a0 net/core/dev.c:6907 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:928 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 4758: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4141 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:597 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:666 alloc_skb include/linux/skbuff.h:1314 [inline] netlink_dump+0x1f7/0xd80 net/netlink/af_netlink.c:2291 netlink_recvmsg+0x6bb/0x11d0 net/netlink/af_netlink.c:1983 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x22f/0x280 net/socket.c:1068 ____sys_recvmsg+0x1db/0x470 net/socket.c:2804 ___sys_recvmsg net/socket.c:2846 [inline] __sys_recvmsg+0x2f0/0x3e0 net/socket.c:2876 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 4758: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2195 [inline] slab_free mm/slub.c:4436 [inline] kfree+0x149/0x360 mm/slub.c:4557 skb_kfree_head net/core/skbuff.c:1069 [inline] skb_free_head net/core/skbuff.c:1081 [inline] skb_release_data+0x676/0x880 net/core/skbuff.c:1108 skb_release_all net/core/skbuff.c:1173 [inline] __kfree_skb net/core/skbuff.c:1187 [inline] consume_skb+0xb1/0x160 net/core/skbuff.c:1409 netlink_recvmsg+0x60a/0x11d0 net/netlink/af_netlink.c:1979 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x22f/0x280 net/socket.c:1068 ____sys_recvmsg+0x1db/0x470 net/socket.c:2804 ___sys_recvmsg net/socket.c:2846 [inline] __sys_recvmsg+0x2f0/0x3e0 net/socket.c:2876 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888017f78000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 8 bytes inside of freed 8192-byte region [ffff888017f78000, ffff888017f7a000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f78 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888015042280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000020002 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015042280 dead000000000122 0000000000000000 head: 0000000000000000 0000000000020002 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea00005fde01 ffffffffffffffff 0000000000000000 head: ffff888000000008 0000000000000000 00000000ffffffff 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 0x1d28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4758, tgid 4758 (dhcpcd), ts 3330152694626, free_ts 3330040418543 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2264 allocate_slab+0x5a/0x2e0 mm/slub.c:2427 new_slab mm/slub.c:2480 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666 __slab_alloc+0x58/0xa0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] __do_kmalloc_node mm/slub.c:4120 [inline] kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4141 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:597 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:666 alloc_skb include/linux/skbuff.h:1314 [inline] netlink_dump+0x1f7/0xd80 net/netlink/af_netlink.c:2291 netlink_recvmsg+0x6bb/0x11d0 net/netlink/af_netlink.c:1983 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x22f/0x280 net/socket.c:1068 ____sys_recvmsg+0x1db/0x470 net/socket.c:2804 ___sys_recvmsg net/socket.c:2846 [inline] __sys_recvmsg+0x2f0/0x3e0 net/socket.c:2876 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 page last free pid 11 tgid 11 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2565 __folio_put+0x3b9/0x620 mm/swap.c:129 folio_put include/linux/mm.h:1508 [inline] free_large_kmalloc+0x105/0x1c0 mm/slub.c:4528 kfree+0x1c4/0x360 mm/slub.c:4551 rhashtable_free_and_destroy+0x7c6/0x920 lib/rhashtable.c:1169 ila_xlat_exit_net+0x55/0x110 net/ipv6/ila/ila_xlat.c:626 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888017f77f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888017f77f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888017f78000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888017f78080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888017f78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================