================================================================== 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 ffff8880291bc008 by task ksoftirqd/0/16 CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.9.0-syzkaller-12162-gf85af9d955ac #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 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:5624 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5738 process_backlog+0x391/0x7d0 net/core/dev.c:6067 __napi_poll+0xcb/0x490 net/core/dev.c:6721 napi_poll net/core/dev.c:6790 [inline] net_rx_action+0x7bb/0x10a0 net/core/dev.c:6906 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 58: 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_noprof+0x22a/0x440 mm/slub.c:4128 kmalloc_node_noprof include/linux/slab.h:681 [inline] kvmalloc_node_noprof+0x72/0x190 mm/util.c:634 bucket_table_alloc lib/rhashtable.c:186 [inline] rhashtable_rehash_alloc+0x9e/0x290 lib/rhashtable.c:367 rhashtable_shrink lib/rhashtable.c:411 [inline] rht_deferred_worker+0x2075/0x23f0 lib/rhashtable.c:429 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 Freed by task 63: 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 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 The buggy address belongs to the object at ffff8880291bc000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 8 bytes inside of freed 4096-byte region [ffff8880291bc000, ffff8880291bd000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x291b8 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 ffff888015042140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015042140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0000a46e01 ffffffffffffffff 0000000000000000 head: 0000000000000008 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 7043, tgid 7043 (syz-executor.0), ts 309797279324, free_ts 309761778143 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] kmalloc_trace_noprof+0x1d5/0x2c0 mm/slub.c:4147 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] kobject_uevent_env+0x28b/0x8e0 lib/kobject_uevent.c:525 __kobject_del+0xd3/0x310 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x245/0x480 lib/kobject.c:737 net_rx_queue_update_kobjects+0x52b/0x5b0 net/core/net-sysfs.c:1174 netif_set_real_num_rx_queues+0x100/0x1f0 net/core/dev.c:2988 veth_init_queues drivers/net/veth.c:1760 [inline] veth_newlink+0x9c5/0xcd0 drivers/net/veth.c:1872 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink net/core/rtnetlink.c:3730 [inline] rtnl_newlink+0x158f/0x20a0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595 page last free pid 6436 tgid 6436 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 discard_slab mm/slub.c:2526 [inline] __put_partials+0xeb/0x130 mm/slub.c:2994 put_cpu_partial+0x17c/0x250 mm/slub.c:3069 __slab_free+0x2ea/0x3d0 mm/slub.c:4306 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4007 ptlock_alloc+0x20/0x70 mm/memory.c:6444 ptlock_init include/linux/mm.h:2968 [inline] pagetable_pte_ctor include/linux/mm.h:2991 [inline] __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline] pte_alloc_one+0xcd/0x5d0 arch/x86/mm/pgtable.c:33 __pte_alloc+0x79/0x3a0 mm/memory.c:442 copy_pte_range mm/memory.c:1094 [inline] copy_pmd_range+0x7c81/0x84c0 mm/memory.c:1240 copy_pud_range mm/memory.c:1277 [inline] copy_p4d_range mm/memory.c:1301 [inline] copy_page_range+0x99f/0xe90 mm/memory.c:1399 dup_mmap kernel/fork.c:751 [inline] dup_mm kernel/fork.c:1688 [inline] copy_mm+0x128d/0x2020 kernel/fork.c:1737 copy_process+0x187a/0x3dc0 kernel/fork.c:2390 kernel_clone+0x226/0x8f0 kernel/fork.c:2797 Memory state around the buggy address: ffff8880291bbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880291bbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880291bc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880291bc080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880291bc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================