================================================================== BUG: KASAN: slab-out-of-bounds in is_tcf_tunnel_set include/net/tc_act/tc_tunnel_key.h:33 [inline] BUG: KASAN: slab-out-of-bounds in tc_setup_flow_action+0xb9d/0x3430 net/sched/cls_api.c:3625 Read of size 8 at addr ffff88811fab90c0 by task syz.2.15964/15401 CPU: 1 PID: 15401 Comm: syz.2.15964 Tainted: G W 5.15.178-syzkaller-00013-g7d1f9b5c2ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 is_tcf_tunnel_set include/net/tc_act/tc_tunnel_key.h:33 [inline] tc_setup_flow_action+0xb9d/0x3430 net/sched/cls_api.c:3625 mall_replace_hw_filter+0x394/0xc20 net/sched/cls_matchall.c:100 mall_change+0x56e/0x780 net/sched/cls_matchall.c:235 tc_new_tfilter+0x151a/0x1c00 net/sched/cls_api.c:2131 rtnetlink_rcv_msg+0x776/0xc40 net/core/rtnetlink.c:5638 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5665 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline] netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1341 netlink_sendmsg+0xa0a/0xd20 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2526 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2526 x64_sys_call+0x16a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fb6ccfb6169 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb6cb620038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fb6cd1cefa0 RCX: 00007fb6ccfb6169 RDX: 0000000000000000 RSI: 0000400000000580 RDI: 0000000000000007 RBP: 00007fb6cd0372a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb6cd1cefa0 R15: 00007ffc972c5bb8 Allocated by task 15401: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13f/0x2c0 mm/slub.c:4431 kmalloc include/linux/slab.h:608 [inline] kzalloc include/linux/slab.h:733 [inline] tcf_idr_create+0x5f/0x780 net/sched/act_api.c:478 tcf_idr_create_from_flags+0x5f/0x70 net/sched/act_api.c:536 tcf_gact_init+0x3cd/0x6e0 net/sched/act_gact.c:102 tcf_action_init_1+0x50f/0x7f0 net/sched/act_api.c:1071 tcf_action_init+0x306/0x840 net/sched/act_api.c:1130 tcf_exts_validate+0x236/0x520 net/sched/cls_api.c:3073 mall_set_parms+0x44/0x4b0 net/sched/cls_matchall.c:171 mall_change+0x495/0x780 net/sched/cls_matchall.c:229 tc_new_tfilter+0x151a/0x1c00 net/sched/cls_api.c:2131 rtnetlink_rcv_msg+0x776/0xc40 net/core/rtnetlink.c:5638 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5665 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline] netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1341 netlink_sendmsg+0xa0a/0xd20 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2526 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2526 x64_sys_call+0x16a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 kvfree_call_rcu+0xb1/0x8b0 kernel/rcu/tree.c:3644 fib_rules_unregister+0x341/0x370 net/core/fib_rules.c:207 fib4_rules_exit+0x3b/0x40 net/ipv4/fib_rules.c:434 ip_fib_net_exit+0x31b/0x360 net/ipv4/fib_frontend.c:1582 fib_net_exit+0x6d/0x80 net/ipv4/fib_frontend.c:1619 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x64b/0xc00 net/core/net_namespace.c:599 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu_common kernel/rcu/tree.c:3007 [inline] call_rcu+0x123/0x10b0 kernel/rcu/tree.c:3125 tnode_free net/ipv4/fib_trie.c:495 [inline] replace+0x19b/0x4b0 net/ipv4/fib_trie.c:521 inflate net/ipv4/fib_trie.c:623 [inline] resize+0xbaf/0x1d60 net/ipv4/fib_trie.c:868 trie_rebalance net/ipv4/fib_trie.c:1101 [inline] fib_insert_node net/ipv4/fib_trie.c:1145 [inline] fib_insert_alias+0xb20/0x1060 net/ipv4/fib_trie.c:1159 fib_trie_unmerge+0x2f6/0x1380 net/ipv4/fib_trie.c:1931 fib_unmerge+0xc4/0x370 net/ipv4/fib_frontend.c:160 fib4_rule_configure+0x114/0xb30 net/ipv4/fib_rules.c:239 fib_nl_newrule+0x14a9/0x1f60 net/core/fib_rules.c:793 rtnetlink_rcv_msg+0x951/0xc40 net/core/rtnetlink.c:5647 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5665 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline] netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1341 netlink_sendmsg+0xa0a/0xd20 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2526 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2526 x64_sys_call+0x16a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88811fab9000 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of 192-byte region [ffff88811fab9000, ffff88811fab90c0) The buggy address belongs to the page: page:ffffea00047eae40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88811fab9e00 pfn:0x11fab9 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea00041de940 0000000400000004 ffff888100042c00 raw: ffff88811fab9e00 000000008010000f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 15263, ts 803899548052, free_ts 803541476256 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5780 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] kmem_cache_alloc_trace+0x147/0x270 mm/slub.c:3267 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:733 [inline] ____ip_mc_inc_group+0x215/0x8d0 net/ipv4/igmp.c:1452 __ip_mc_inc_group net/ipv4/igmp.c:1487 [inline] ip_mc_inc_group net/ipv4/igmp.c:1493 [inline] ip_mc_up+0x10f/0x1e0 net/ipv4/igmp.c:1792 inetdev_event+0xc45/0x10a0 net/ipv4/devinet.c:1587 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391 __dev_notify_flags+0x304/0x610 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8905 do_setlink+0xc21/0x3d80 net/core/rtnetlink.c:2776 __rtnl_newlink net/core/rtnetlink.c:3447 [inline] rtnl_newlink+0x17bc/0x2050 net/core/rtnetlink.c:3569 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5856 free_pages+0x7c/0x90 mm/page_alloc.c:5867 kasan_depopulate_vmalloc_pte+0x6a/0x90 mm/kasan/shadow.c:354 apply_to_pte_range mm/memory.c:2642 [inline] apply_to_pmd_range mm/memory.c:2686 [inline] apply_to_pud_range mm/memory.c:2722 [inline] apply_to_p4d_range mm/memory.c:2758 [inline] __apply_to_page_range+0x8dd/0xbe0 mm/memory.c:2792 apply_to_existing_page_range+0x38/0x50 mm/memory.c:2825 kasan_release_vmalloc+0x9a/0xb0 mm/kasan/shadow.c:464 __purge_vmap_area_lazy+0x154a/0x1690 mm/vmalloc.c:1715 _vm_unmap_aliases+0x339/0x3b0 mm/vmalloc.c:2118 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:2141 change_page_attr_set_clr+0x308/0x1050 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0xa1/0xe0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:892 [inline] bpf_int_jit_compile+0xbf21/0xc6b0 arch/x86/net/bpf_jit_comp.c:2422 bpf_prog_select_runtime+0x724/0xa10 kernel/bpf/core.c:1934 bpf_prog_load+0x1315/0x1b50 kernel/bpf/syscall.c:2337 Memory state around the buggy address: ffff88811fab8f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811fab9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88811fab9080: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88811fab9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811fab9180: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc 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