bond4 (unregistering): Released all slaves bond3 (unregistering): Released all slaves bond2 (unregistering): Released all slaves bond1 (unregistering): Released all slaves ================================================================== BUG: KASAN: slab-use-after-free in tcx_uninstall+0x5cc/0x630 kernel/bpf/tcx.c:107 Read of size 8 at addr ffff888076884208 by task kworker/u4:5/15223 CPU: 0 PID: 15223 Comm: kworker/u4:5 Not tainted 6.5.0-rc2-next-20230720-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 tcx_uninstall+0x5cc/0x630 kernel/bpf/tcx.c:107 dev_tcx_uninstall include/net/tcx.h:174 [inline] unregister_netdevice_many_notify+0x5e7/0x1a20 net/core/dev.c:10899 unregister_netdevice_many net/core/dev.c:10964 [inline] default_device_exit_batch+0x584/0x740 net/core/dev.c:11417 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 16144: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1024 [inline] __kmalloc_node_track_caller+0x61/0x100 mm/slab_common.c:1044 kmalloc_reserve+0xef/0x270 net/core/skbuff.c:575 pskb_expand_head+0x236/0x1170 net/core/skbuff.c:2042 netlink_trim+0x1eb/0x240 net/netlink/af_netlink.c:1321 netlink_broadcast+0xb5/0xea0 net/netlink/af_netlink.c:1517 nlmsg_multicast include/net/netlink.h:1083 [inline] nlmsg_notify+0x99/0x210 net/netlink/af_netlink.c:2589 qdisc_notify.isra.0+0x1cd/0x330 net/sched/sch_api.c:1030 notify_and_destroy net/sched/sch_api.c:1044 [inline] qdisc_graft+0xd0e/0x1680 net/sched/sch_api.c:1144 tc_modify_qdisc+0xcd2/0x1bf0 net/sched/sch_api.c:1731 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6423 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 16144: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15e/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822 skb_kfree_head net/core/skbuff.c:894 [inline] skb_free_head+0x110/0x1b0 net/core/skbuff.c:906 skb_release_data+0x5ba/0x870 net/core/skbuff.c:936 skb_release_all net/core/skbuff.c:1002 [inline] __kfree_skb net/core/skbuff.c:1016 [inline] consume_skb net/core/skbuff.c:1232 [inline] consume_skb+0xd2/0x170 net/core/skbuff.c:1226 netlink_broadcast+0x3ad/0xea0 net/netlink/af_netlink.c:1538 nlmsg_multicast include/net/netlink.h:1083 [inline] nlmsg_notify+0x99/0x210 net/netlink/af_netlink.c:2589 qdisc_notify.isra.0+0x1cd/0x330 net/sched/sch_api.c:1030 notify_and_destroy net/sched/sch_api.c:1044 [inline] qdisc_graft+0xd0e/0x1680 net/sched/sch_api.c:1144 tc_modify_qdisc+0xcd2/0x1bf0 net/sched/sch_api.c:1731 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6423 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 insert_work+0x4a/0x330 kernel/workqueue.c:1556 __queue_work+0x5f5/0x1040 kernel/workqueue.c:1717 queue_work_on+0xed/0x110 kernel/workqueue.c:1747 queue_work include/linux/workqueue.h:506 [inline] afs_queue_server_manager fs/afs/server.c:612 [inline] afs_purge_servers+0xee/0x350 fs/afs/server.c:626 afs_net_exit+0x87/0xf0 fs/afs/main.c:157 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 Second to last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 insert_work+0x4a/0x330 kernel/workqueue.c:1556 __queue_work+0x5f5/0x1040 kernel/workqueue.c:1717 queue_work_on+0xed/0x110 kernel/workqueue.c:1747 queue_work include/linux/workqueue.h:506 [inline] afs_queue_cell_manager+0x64/0xe0 fs/afs/cell.c:520 afs_cell_purge+0x109/0x2c0 fs/afs/cell.c:946 afs_net_exit+0x7f/0xf0 fs/afs/main.c:156 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:170 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 The buggy address belongs to the object at ffff888076884000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 520 bytes inside of freed 2048-byte region [ffff888076884000, ffff888076884800) The buggy address belongs to the physical page: page:ffffea0001da2000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76880 head:ffffea0001da2000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012842000 ffffea0000802200 dead000000000002 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5067, tgid 5067 (syz-executor.0), ts 144501887990, free_ts 144498602787 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1569 prep_new_page mm/page_alloc.c:1576 [inline] get_page_from_freelist+0x10d7/0x31b0 mm/page_alloc.c:3256 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4512 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1870 [inline] allocate_slab+0x24e/0x380 mm/slub.c:2017 new_slab mm/slub.c:2070 [inline] ___slab_alloc+0x8bc/0x1570 mm/slub.c:3223 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322 __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3517 kmalloc_trace+0x25/0xe0 mm/slab_common.c:1115 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] device_create_groups_vargs+0x8a/0x270 drivers/base/core.c:4284 device_create+0xe9/0x120 drivers/base/core.c:4341 macvtap_device_event+0x2ff/0x3d0 drivers/net/macvtap.c:176 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1962 call_netdevice_notifiers_extack net/core/dev.c:2000 [inline] call_netdevice_notifiers net/core/dev.c:2014 [inline] register_netdevice+0x1029/0x1630 net/core/dev.c:10141 macvlan_common_newlink+0x1102/0x1a40 drivers/net/macvlan.c:1551 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1160 [inline] free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2383 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2478 __unfreeze_partials+0x21d/0x240 mm/slub.c:2655 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x19b/0x350 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1023 [inline] __kmalloc_node_track_caller+0x50/0x100 mm/slab_common.c:1044 kstrdup+0x3c/0x70 mm/util.c:62 kstrdup_const+0x5f/0x70 mm/util.c:85 __kernfs_new_node+0x9c/0x8a0 fs/kernfs/dir.c:607 kernfs_new_node+0x94/0x110 fs/kernfs/dir.c:675 kernfs_create_link+0xcc/0x230 fs/kernfs/symlink.c:39 sysfs_do_create_link_sd+0x90/0x140 fs/sysfs/symlink.c:44 sysfs_do_create_link fs/sysfs/symlink.c:80 [inline] sysfs_create_link+0x61/0xc0 fs/sysfs/symlink.c:92 macvtap_device_event+0x32d/0x3d0 drivers/net/macvtap.c:182 Memory state around the buggy address: ffff888076884100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888076884180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888076884200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888076884280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888076884300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================