================================================================== 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+0x870/0x3240 net/sched/cls_api.c:3625 Read of size 8 at addr ffff88810afd2ec0 by task syz.3.14393/16651 CPU: 1 PID: 16651 Comm: syz.3.14393 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 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+0x870/0x3240 net/sched/cls_api.c:3625 mall_replace_hw_filter+0x293/0x820 net/sched/cls_matchall.c:100 mall_change+0x526/0x740 net/sched/cls_matchall.c:235 tc_new_tfilter+0x12a2/0x1870 net/sched/cls_api.c:2131 rtnetlink_rcv_msg+0x81b/0xb90 net/core/rtnetlink.c:5641 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5668 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x876/0xa40 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x86a/0xb70 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg net/socket.c:2526 [inline] __x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2526 x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4187323ec9 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:00007f4185d8c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f418757afa0 RCX: 00007f4187323ec9 RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000006 RBP: 00007f41873a6f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f418757b038 R14: 00007f418757afa0 R15: 00007ffec4def098 Allocated by task 16651: 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 mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] __kmalloc+0x13d/0x2c0 mm/slub.c:4436 kmalloc include/linux/slab.h:621 [inline] kzalloc include/linux/slab.h:747 [inline] tcf_idr_create+0x5f/0x790 net/sched/act_api.c:478 tcf_idr_create_from_flags+0x61/0x70 net/sched/act_api.c:536 tcf_gact_init+0x346/0x580 net/sched/act_gact.c:102 tcf_action_init_1+0x3f7/0x6a0 net/sched/act_api.c:1071 tcf_action_init+0x1e9/0x710 net/sched/act_api.c:1130 tcf_exts_validate+0x217/0x520 net/sched/cls_api.c:3073 mall_set_parms+0x48/0x520 net/sched/cls_matchall.c:171 mall_change+0x45a/0x740 net/sched/cls_matchall.c:229 tc_new_tfilter+0x12a2/0x1870 net/sched/cls_api.c:2131 rtnetlink_rcv_msg+0x81b/0xb90 net/core/rtnetlink.c:5641 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5668 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x876/0xa40 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x86a/0xb70 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg net/socket.c:2526 [inline] __x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2526 x64_sys_call+0x4b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 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_common kernel/rcu/tree.c:3011 [inline] call_rcu+0x105/0xfe0 kernel/rcu/tree.c:3129 neigh_parms_release+0x1e0/0x220 net/core/neighbour.c:1674 inetdev_destroy net/ipv4/devinet.c:328 [inline] inetdev_event+0x81c/0x10a0 net/ipv4/devinet.c:1612 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2057 [inline] call_netdevice_notifiers_extack net/core/dev.c:2069 [inline] call_netdevice_notifiers net/core/dev.c:2083 [inline] unregister_netdevice_many+0xfb8/0x1990 net/core/dev.c:11150 unregister_netdevice_queue+0x31c/0x360 net/core/dev.c:11083 unregister_netdevice include/linux/netdevice.h:3057 [inline] __tun_detach+0xca6/0x1450 drivers/net/tun.c:686 tun_detach drivers/net/tun.c:702 [inline] tun_chr_close+0x92/0x140 drivers/net/tun.c:3440 __fput+0x20b/0x8b0 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 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 __call_rcu_common kernel/rcu/tree.c:3011 [inline] call_rcu+0x105/0xfe0 kernel/rcu/tree.c:3129 neigh_parms_release+0x1e0/0x220 net/core/neighbour.c:1674 inetdev_destroy net/ipv4/devinet.c:328 [inline] inetdev_event+0x81c/0x10a0 net/ipv4/devinet.c:1612 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2057 [inline] call_netdevice_notifiers_extack net/core/dev.c:2069 [inline] call_netdevice_notifiers net/core/dev.c:2083 [inline] unregister_netdevice_many+0xfb8/0x1990 net/core/dev.c:11150 ip_tunnel_delete_nets+0x343/0x390 net/ipv4/ip_tunnel.c:1137 vti_exit_batch_net+0x22/0x30 net/ipv4/ip_vti.c:515 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x602/0xad0 net/core/net_namespace.c:599 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472 kthread+0x411/0x500 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88810afd2e00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of 192-byte region [ffff88810afd2e00, ffff88810afd2ec0) The buggy address belongs to the page: page:ffffea00042bf480 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10afd2 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea0004770dc0 0000000700000007 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 0x12c00(GFP_NOIO|__GFP_NOWARN|__GFP_NORETRY), pid 8, ts 3241643558, free_ts 3233066071 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5808 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1937 [inline] new_slab+0xa1/0x4d0 mm/slub.c:2000 ___slab_alloc+0x381/0x810 mm/slub.c:3033 __slab_alloc+0x49/0x90 mm/slub.c:3120 slab_alloc_node mm/slub.c:3211 [inline] slab_alloc mm/slub.c:3255 [inline] __kmalloc+0x16a/0x2c0 mm/slub.c:4432 kmalloc include/linux/slab.h:621 [inline] bio_kmalloc+0x52/0x230 block/bio.c:523 bio_map_kern block/blk-map.c:351 [inline] blk_rq_map_kern+0x1e0/0x870 block/blk-map.c:642 __scsi_execute+0xe4/0x5a0 drivers/scsi/scsi_lib.c:228 scsi_execute_req include/scsi/scsi_device.h:477 [inline] scsi_vpd_inquiry drivers/scsi/scsi.c:321 [inline] scsi_get_vpd_page+0x196/0x5d0 drivers/scsi/scsi.c:363 sd_read_block_characteristics drivers/scsi/sd.c:2985 [inline] sd_revalidate_disk+0x2309/0x6af0 drivers/scsi/sd.c:3203 sd_probe+0xab4/0xf60 drivers/scsi/sd.c:3465 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 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+0x542/0x550 mm/page_alloc.c:3534 free_unref_page_list+0x134/0x9d0 mm/page_alloc.c:3671 release_pages+0xfda/0x1030 mm/swap.c:1014 __pagevec_release+0x71/0xe0 mm/swap.c:1034 pagevec_release include/linux/pagevec.h:81 [inline] truncate_inode_pages_range+0x2f7/0xd60 mm/truncate.c:332 truncate_inode_pages+0x24/0x30 mm/truncate.c:428 kill_bdev block/bdev.c:77 [inline] blkdev_flush_mapping+0x182/0x340 block/bdev.c:659 blkdev_put_whole block/bdev.c:690 [inline] blkdev_put+0x47d/0x770 block/bdev.c:957 disk_scan_partitions+0x1cc/0x250 block/genhd.c:385 device_add_disk+0xa44/0xd30 block/genhd.c:513 sd_probe+0xaac/0xf60 drivers/scsi/sd.c:3461 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x285/0x970 drivers/base/dd.c:595 __driver_probe_device+0x198/0x280 drivers/base/dd.c:755 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:785 __driver_attach_async_helper+0x12e/0x210 drivers/base/dd.c:1096 async_run_entry_fn+0x8f/0x2c0 kernel/async.c:127 Memory state around the buggy address: ffff88810afd2d80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ffff88810afd2e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810afd2e80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88810afd2f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810afd2f80: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc 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