================================================================== 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+0x875/0x3330 net/sched/cls_api.c:3640 Read of size 8 at addr ffff88810b15a8c0 by task syz.7.638/2665 CPU: 0 PID: 2665 Comm: syz.7.638 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x100/0x140 mm/kasan/report.c:452 __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+0x875/0x3330 net/sched/cls_api.c:3640 mall_replace_hw_filter+0x2db/0x8c0 net/sched/cls_matchall.c:100 mall_change+0x546/0x770 net/sched/cls_matchall.c:236 tc_new_tfilter+0x1487/0x1ab0 net/sched/cls_api.c:2134 rtnetlink_rcv_msg+0x811/0xca0 net/core/rtnetlink.c:5605 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2503 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5632 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg net/socket.c:2466 [inline] __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff5bb35be59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff5b9db6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff5bb5d4fa0 RCX: 00007ff5bb35be59 RDX: 000000002000c8d4 RSI: 0000200000000180 RDI: 0000000000000004 RBP: 00007ff5bb3f1e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff5bb5d5038 R14: 00007ff5bb5d4fa0 R15: 00007ffc38039318 Allocated by task 2665: 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:430 [inline] ____kasan_kmalloc mm/kasan/common.c:509 [inline] __kasan_kmalloc+0xd4/0x100 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] __kmalloc+0x19f/0x330 mm/slub.c:4038 kmalloc include/linux/slab.h:560 [inline] kzalloc include/linux/slab.h:667 [inline] tcf_idr_create+0x5f/0x790 net/sched/act_api.c:430 tcf_idr_create_from_flags+0x61/0x70 net/sched/act_api.c:488 tcf_gact_init+0x2e6/0x560 net/sched/act_gact.c:102 tcf_action_init_1+0x443/0x6d0 net/sched/act_api.c:1052 tcf_action_init+0x227/0x780 net/sched/act_api.c:1109 tcf_exts_validate+0x23c/0x540 net/sched/cls_api.c:3087 mall_set_parms+0x4a/0x450 net/sched/cls_matchall.c:171 mall_change+0x47a/0x770 net/sched/cls_matchall.c:230 tc_new_tfilter+0x1487/0x1ab0 net/sched/cls_api.c:2134 rtnetlink_rcv_msg+0x811/0xca0 net/core/rtnetlink.c:5605 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2503 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5632 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg net/socket.c:2466 [inline] __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2980 [inline] call_rcu+0x11a/0x1090 kernel/rcu/tree.c:3054 neigh_parms_release+0x1c1/0x1f0 net/core/neighbour.c:1682 inetdev_destroy net/ipv4/devinet.c:327 [inline] inetdev_event+0x805/0x1010 net/ipv4/devinet.c:1612 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2054 [inline] call_netdevice_notifiers_extack net/core/dev.c:2066 [inline] call_netdevice_notifiers net/core/dev.c:2080 [inline] unregister_netdevice_many+0x100e/0x19f0 net/core/dev.c:10780 ip6gre_exit_batch_net+0x5ca/0x620 net/ipv6/ip6_gre.c:1656 ops_exit_list net/core/net_namespace.c:190 [inline] cleanup_net+0x5fe/0xb80 net/core/net_namespace.c:609 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447 kthread+0x324/0x3b0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Second to last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 kvfree_call_rcu+0x117/0x670 kernel/rcu/tree.c:3539 ip_ma_put+0xf7/0x140 net/ipv4/igmp.c:171 __ip_mc_dec_group+0x464/0x540 net/ipv4/igmp.c:1697 ip_mc_dec_group include/linux/igmp.h:138 [inline] ip_mc_down+0x1b0/0x240 net/ipv4/igmp.c:1752 inetdev_event+0x2b2/0x1010 net/ipv4/devinet.c:1598 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2054 [inline] call_netdevice_notifiers_extack net/core/dev.c:2066 [inline] call_netdevice_notifiers net/core/dev.c:2080 [inline] __dev_notify_flags+0x276/0x5b0 net/core/dev.c:8587 dev_change_flags+0xe3/0x1a0 net/core/dev.c:8623 do_setlink+0xb19/0x29a0 net/core/rtnetlink.c:2736 rtnl_group_changelink net/core/rtnetlink.c:3255 [inline] __rtnl_newlink net/core/rtnetlink.c:3424 [inline] rtnl_newlink+0xf1c/0x1830 net/core/rtnetlink.c:3534 rtnetlink_rcv_msg+0x9e9/0xca0 net/core/rtnetlink.c:5614 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2503 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5632 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg net/socket.c:2466 [inline] __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88810b15a800 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of 192-byte region [ffff88810b15a800, ffff88810b15a8c0) The buggy address belongs to the page: page:ffffea00042c5680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10b15a flags: 0x4000000000000200(slab) raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100043380 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 0x12c00(GFP_NOIO|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 1840588321, free_ts 0 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x176/0x190 mm/page_alloc.c:2462 get_page_from_freelist+0x225f/0x23f0 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x29a/0x640 mm/page_alloc.c:5384 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1813 [inline] new_slab+0x84/0x3f0 mm/slub.c:1874 new_slab_objects mm/slub.c:2632 [inline] ___slab_alloc+0x2f8/0x4c0 mm/slub.c:2796 __slab_alloc+0x63/0xa0 mm/slub.c:2836 slab_alloc_node mm/slub.c:2918 [inline] slab_alloc mm/slub.c:2960 [inline] __kmalloc+0x1f9/0x330 mm/slub.c:4034 kmalloc include/linux/slab.h:560 [inline] bio_alloc_bioset+0x11a/0x570 block/bio.c:451 bio_kmalloc include/linux/bio.h:417 [inline] bio_map_kern block/blk-map.c:391 [inline] blk_rq_map_kern+0x1dd/0x910 block/blk-map.c:698 __scsi_execute+0xe7/0x650 drivers/scsi/scsi_lib.c:258 scsi_execute_req include/scsi/scsi_device.h:470 [inline] scsi_probe_lun drivers/scsi/scsi_scan.c:610 [inline] scsi_probe_and_add_lun+0x40d/0x3370 drivers/scsi/scsi_scan.c:1107 __scsi_scan_target+0x1d2/0xbf0 drivers/scsi/scsi_scan.c:1581 scsi_scan_channel drivers/scsi/scsi_scan.c:1669 [inline] scsi_scan_host_selected+0x34e/0x600 drivers/scsi/scsi_scan.c:1698 do_scsi_scan_host drivers/scsi/scsi_scan.c:1837 [inline] scsi_scan_host+0x39e/0x670 drivers/scsi/scsi_scan.c:1867 virtscsi_probe+0x8f6/0xab0 drivers/scsi/virtio_scsi.c:915 virtio_dev_probe+0x8df/0xb30 drivers/virtio/virtio.c:274 page_owner free stack trace missing Memory state around the buggy address: ffff88810b15a780: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc ffff88810b15a800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810b15a880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88810b15a900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810b15a980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 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