================================================================== 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 ffff88810b0fcac0 by task syz.2.9958/1638 CPU: 1 PID: 1638 Comm: syz.2.9958 Not tainted 5.15.175-syzkaller-00803-g19092c8155b4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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: 0033:0x7fe8f6bb0d29 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:00007fe8f5222038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe8f6da0fa0 RCX: 00007fe8f6bb0d29 RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000003 RBP: 00007fe8f6c2cb08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe8f6da0fa0 R15: 00007ffc0e0ebe98 Allocated by task 1638: 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_rule_put include/net/fib_rules.h:134 [inline] fib_rules_cleanup_ops net/core/fib_rules.c:194 [inline] fib_rules_unregister+0x2cc/0x370 net/core/fib_rules.c:206 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 neigh_parms_release+0x1e1/0x220 net/core/neighbour.c:1674 inetdev_destroy net/ipv4/devinet.c:328 [inline] inetdev_event+0x7e8/0x10a0 net/ipv4/devinet.c:1612 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2026 [inline] call_netdevice_notifiers_extack net/core/dev.c:2038 [inline] call_netdevice_notifiers net/core/dev.c:2052 [inline] unregister_netdevice_many+0xe0a/0x17c0 net/core/dev.c:11118 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:11051 unregister_netdevice include/linux/netdevice.h:3052 [inline] __tun_detach+0xd14/0x1510 drivers/net/tun.c:686 tun_detach drivers/net/tun.c:702 [inline] tun_chr_close+0x92/0x140 drivers/net/tun.c:3440 __fput+0x228/0x8c0 fs/file_table.c:280 ____fput+0x15/0x20 fs/file_table.c:308 task_work_run+0x129/0x190 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xc48/0x2ca0 kernel/exit.c:880 do_group_exit+0x141/0x310 kernel/exit.c:1002 get_signal+0x7a3/0x1630 kernel/signal.c:2907 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:178 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88810b0fca00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of 192-byte region [ffff88810b0fca00, ffff88810b0fcac0) The buggy address belongs to the page: page:ffffea00042c3f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10b0fc flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea0004614a40 0000000800000008 ffff888100042c00 raw: 0000000000000000 0000000080100010 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 2022384720, free_ts 2011259878 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] __kmalloc_track_caller+0x171/0x2c0 mm/slub.c:4949 kmemdup+0x24/0x50 mm/util.c:132 neigh_parms_alloc+0x81/0x4c0 net/core/neighbour.c:1630 inetdev_init+0x134/0x4c0 net/ipv4/devinet.c:273 inetdev_event+0x205/0x10a0 net/ipv4/devinet.c:1544 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2026 [inline] call_netdevice_notifiers_extack net/core/dev.c:2038 [inline] call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2052 register_netdevice+0x1035/0x1390 net/core/dev.c:10404 virtnet_probe+0x15dc/0x27a0 drivers/net/virtio_net.c:3334 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 mm/page_alloc.c:5856 [inline] free_pages mm/page_alloc.c:5867 [inline] make_alloc_exact+0x1a5/0x1e0 mm/page_alloc.c:6008 alloc_pages_exact+0x63/0x70 mm/page_alloc.c:6039 vring_alloc_queue drivers/virtio/virtio_ring.c:284 [inline] vring_create_virtqueue_split drivers/virtio/virtio_ring.c:952 [inline] vring_create_virtqueue+0x297/0x1c30 drivers/virtio/virtio_ring.c:2286 setup_vq+0x15b/0x370 drivers/virtio/virtio_pci_modern.c:222 vp_setup_vq+0xc0/0x320 drivers/virtio/virtio_pci_common.c:189 vp_find_vqs_msix+0x899/0xea0 drivers/virtio/virtio_pci_common.c:322 vp_find_vqs+0x54/0x440 drivers/virtio/virtio_pci_common.c:401 virtio_find_vqs_ctx include/linux/virtio_config.h:219 [inline] virtnet_find_vqs drivers/net/virtio_net.c:2965 [inline] init_vqs+0xa40/0x1050 drivers/net/virtio_net.c:3050 virtnet_probe+0x13f0/0x27a0 drivers/net/virtio_net.c:3310 virtio_dev_probe+0x891/0xae0 drivers/virtio/virtio.c:273 really_probe+0x28d/0x970 drivers/base/dd.c:595 __driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755 driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785 __driver_attach+0x446/0x590 drivers/base/dd.c:1164 Memory state around the buggy address: ffff88810b0fc980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88810b0fca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810b0fca80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88810b0fcb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810b0fcb80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================