================================================================== 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 ffff88810ad5ecc0 by task syz.6.654/2686 CPU: 0 PID: 2686 Comm: syz.6.654 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 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+0x2cc/0x8b0 net/sched/cls_matchall.c:100 mall_change+0x544/0x760 net/sched/cls_matchall.c:235 tc_new_tfilter+0x12e5/0x18e0 net/sched/cls_api.c:2131 rtnetlink_rcv_msg+0x871/0xce0 net/core/rtnetlink.c:5641 netlink_rcv_skb+0x1f5/0x440 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+0x879/0xb80 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2435 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2489 __sys_sendmsg net/socket.c:2518 [inline] __do_sys_sendmsg net/socket.c:2527 [inline] __se_sys_sendmsg net/socket.c:2525 [inline] __x64_sys_sendmsg+0x206/0x2f0 net/socket.c:2525 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: 0033:0x7f8199c44819 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:00007f819869f028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8199ebdfa0 RCX: 00007f8199c44819 RDX: 0000000020000000 RSI: 0000200000000580 RDI: 0000000000000004 RBP: 00007f8199cdac91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8199ebe038 R14: 00007f8199ebdfa0 R15: 00007ffc235a48b8 Allocated by task 2686: 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:624 [inline] kzalloc include/linux/slab.h:750 [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+0x342/0x570 net/sched/act_gact.c:102 tcf_action_init_1+0x3ff/0x6b0 net/sched/act_api.c:1071 tcf_action_init+0x233/0x7a0 net/sched/act_api.c:1130 tcf_exts_validate+0x24a/0x580 net/sched/cls_api.c:3073 mall_set_parms+0x48/0x520 net/sched/cls_matchall.c:171 mall_change+0x478/0x760 net/sched/cls_matchall.c:229 tc_new_tfilter+0x12e5/0x18e0 net/sched/cls_api.c:2131 rtnetlink_rcv_msg+0x871/0xce0 net/core/rtnetlink.c:5641 netlink_rcv_skb+0x1f5/0x440 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+0x879/0xb80 net/netlink/af_netlink.c:1922 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2435 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2489 __sys_sendmsg net/socket.c:2518 [inline] __do_sys_sendmsg net/socket.c:2527 [inline] __se_sys_sendmsg net/socket.c:2525 [inline] __x64_sys_sendmsg+0x206/0x2f0 net/socket.c:2525 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 kvfree_call_rcu+0xb6/0x840 kernel/rcu/tree.c:3648 ip_ma_put+0xf7/0x140 net/ipv4/igmp.c:171 __ip_mc_dec_group+0x44e/0x520 net/ipv4/igmp.c:1697 ip_mc_dec_group include/linux/igmp.h:135 [inline] ip_mc_down+0x1b0/0x240 net/ipv4/igmp.c:1752 inetdev_event+0x2c6/0x10a0 net/ipv4/devinet.c:1598 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:2070 [inline] call_netdevice_notifiers_extack net/core/dev.c:2082 [inline] call_netdevice_notifiers net/core/dev.c:2096 [inline] dev_close_many+0x32e/0x4d0 net/core/dev.c:1671 unregister_netdevice_many+0x45e/0x1aa0 net/core/dev.c:11152 ip_tunnel_delete_nets+0x34b/0x3a0 net/ipv4/ip_tunnel.c:1123 erspan_exit_batch_net+0x22/0x30 net/ipv4/ip_gre.c:1736 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x60a/0xae0 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 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+0x10b/0xf80 kernel/rcu/tree.c:3129 blk_stat_free_callback+0x2a/0x40 block/blk-stat.c:184 blk_release_queue+0xc7/0x260 block/blk-sysfs.c:806 kobject_cleanup lib/kobject.c:713 [inline] kobject_release lib/kobject.c:744 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x18a/0x270 lib/kobject.c:761 blk_put_queue+0x19/0x20 block/blk-core.c:347 scsi_device_dev_release_usercontext+0x594/0x830 drivers/scsi/scsi_sysfs.c:478 execute_in_process_context+0x183/0x210 kernel/workqueue.c:3393 scsi_device_dev_release+0xfa/0x110 drivers/scsi/scsi_sysfs.c:519 device_release+0x96/0x1c0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:713 [inline] kobject_release lib/kobject.c:744 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x18a/0x270 lib/kobject.c:761 put_device+0x1f/0x30 drivers/base/core.c:3530 __scsi_remove_device+0x2e9/0x330 drivers/scsi/scsi_sysfs.c:1506 scsi_probe_and_add_lun+0x14d2/0x3650 drivers/scsi/scsi_scan.c:1254 __scsi_scan_target+0x1d2/0xb70 drivers/scsi/scsi_scan.c:1637 scsi_scan_channel drivers/scsi/scsi_scan.c:1725 [inline] scsi_scan_host_selected+0x343/0x5f0 drivers/scsi/scsi_scan.c:1754 do_scsi_scan_host drivers/scsi/scsi_scan.c:1893 [inline] scsi_scan_host+0x39e/0x660 drivers/scsi/scsi_scan.c:1923 virtscsi_probe+0x8ba/0xa30 drivers/scsi/virtio_scsi.c:915 virtio_dev_probe+0x8d4/0xb20 drivers/virtio/virtio.c:273 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+0x416/0x560 drivers/base/dd.c:1164 bus_for_each_dev+0x17b/0x1f0 drivers/base/bus.c:303 driver_attach+0x42/0x50 drivers/base/dd.c:1181 bus_add_driver+0x335/0x580 drivers/base/bus.c:620 driver_register+0x33a/0x440 drivers/base/driver.c:240 register_virtio_driver+0x9a/0xd0 drivers/virtio/virtio.c:325 init+0x66/0xe0 drivers/scsi/virtio_scsi.c:1009 do_one_initcall+0x1fc/0x5a0 init/main.c:1318 do_initcall_level+0x16f/0x2d0 init/main.c:1391 do_initcalls+0x50/0xa0 init/main.c:1407 do_basic_setup+0x81/0x90 init/main.c:1426 kernel_init_freeable+0x294/0x3d0 init/main.c:1631 kernel_init+0x1d/0x1b0 init/main.c:1522 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff88810ad5ec00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 0 bytes to the right of 192-byte region [ffff88810ad5ec00, ffff88810ad5ecc0) The buggy address belongs to the page: page:ffffea00042b5780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10ad5e flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 dead000000000100 dead000000000122 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 1, ts 2584584226, free_ts 0 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+0x2d3a/0x2dc0 mm/page_alloc.c:4485 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5822 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_node include/linux/slab.h:487 [inline] kmalloc_array_node include/linux/slab.h:712 [inline] kcalloc_node include/linux/slab.h:717 [inline] sbitmap_init_node+0x2e0/0x710 lib/sbitmap.c:114 blk_mq_alloc_hctx block/blk-mq.c:2849 [inline] blk_mq_alloc_and_init_hctx block/blk-mq.c:3234 [inline] blk_mq_realloc_hw_ctxs+0x772/0x1700 block/blk-mq.c:3286 blk_mq_init_allocated_queue+0x3fa/0x17e0 block/blk-mq.c:3347 blk_mq_init_queue_data block/blk-mq.c:3182 [inline] blk_mq_init_queue+0x6c/0xd0 block/blk-mq.c:3192 scsi_alloc_sdev+0x66c/0x9c0 drivers/scsi/scsi_scan.c:319 scsi_probe_and_add_lun+0x188/0x3650 drivers/scsi/scsi_scan.c:1156 __scsi_scan_target+0x1d2/0xb70 drivers/scsi/scsi_scan.c:1637 scsi_scan_channel drivers/scsi/scsi_scan.c:1725 [inline] scsi_scan_host_selected+0x343/0x5f0 drivers/scsi/scsi_scan.c:1754 page_owner free stack trace missing Memory state around the buggy address: ffff88810ad5eb80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ffff88810ad5ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810ad5ec80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88810ad5ed00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810ad5ed80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc 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