Dead loop on virtual device gre4, fix it urgently! macsec2 selects TX queue 0, but real number of TX queues is 0 ================================================================== BUG: KASAN: slab-use-after-free in netdev_get_tx_queue include/linux/netdevice.h:2466 [inline] BUG: KASAN: slab-use-after-free in netdev_core_pick_tx+0x323/0x350 net/core/dev.c:4129 Read of size 8 at addr ffff88807ace8440 by task aoe_tx0/1213 CPU: 0 PID: 1213 Comm: aoe_tx0 Not tainted 6.3.0-rc6-syzkaller-00132-ge50b9b9e8610 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319 print_report mm/kasan/report.c:430 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:536 netdev_get_tx_queue include/linux/netdevice.h:2466 [inline] netdev_core_pick_tx+0x323/0x350 net/core/dev.c:4129 __dev_queue_xmit+0x10b4/0x3c40 net/core/dev.c:4207 dev_queue_xmit include/linux/netdevice.h:3054 [inline] tx+0x76/0x100 drivers/block/aoe/aoenet.c:63 kthread+0x1eb/0x3b0 drivers/block/aoe/aoecmd.c:1229 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 27042: kasan_save_stack+0x22/0x40 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 mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc_node+0x61/0x1a0 mm/slab_common.c:974 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:603 kvmalloc include/linux/slab.h:737 [inline] kvzalloc include/linux/slab.h:745 [inline] alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10588 rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3312 rtnl_newlink_create net/core/rtnetlink.c:3430 [inline] __rtnl_newlink+0xfd4/0x1840 net/core/rtnetlink.c:3657 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3670 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6181 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2577 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 27042: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 kvfree+0x46/0x50 mm/util.c:649 device_release+0xa3/0x240 drivers/base/core.c:2436 kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c2/0x4d0 lib/kobject.c:729 netdev_run_todo+0x762/0x1100 net/core/dev.c:10362 rtnl_unlock net/core/rtnetlink.c:148 [inline] rtnetlink_rcv_msg+0x44a/0xd50 net/core/rtnetlink.c:6182 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2577 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807ace8000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 1088 bytes inside of freed 4096-byte region [ffff88807ace8000, ffff88807ace9000) The buggy address belongs to the physical page: page:ffffea0001eb3a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ace8 head:ffffea0001eb3a00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88801e82cd81 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff88801244f500 ffffea0001d80e00 dead000000000002 raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88801e82cd81 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 21929, tgid 21928 (syz-executor.1), ts 2602436727240, free_ts 2601761284085 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4326 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5592 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc_node+0x51/0x1a0 mm/slab_common.c:974 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0xa2/0x1a0 mm/util.c:603 kvmalloc include/linux/slab.h:737 [inline] kvzalloc include/linux/slab.h:745 [inline] alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10588 __ip_tunnel_create+0x201/0x5b0 net/ipv4/ip_tunnel.c:254 ip_tunnel_init_net+0x1f9/0x5d0 net/ipv4/ip_tunnel.c:1073 ops_init+0xb9/0x6b0 net/core/net_namespace.c:135 setup_net+0x5d1/0xc50 net/core/net_namespace.c:338 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:490 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare+0x5d5/0xa50 mm/page_alloc.c:1504 free_unref_page_prepare mm/page_alloc.c:3388 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3483 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:769 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x20a/0x600 mm/slub.c:3483 __d_alloc+0x32/0x980 fs/dcache.c:1769 d_alloc_pseudo+0x1d/0x70 fs/dcache.c:1899 alloc_file_pseudo+0xca/0x250 fs/file_table.c:266 sock_alloc_file+0x53/0x190 net/socket.c:466 sock_map_fd net/socket.c:490 [inline] __sys_socket+0x1a8/0x250 net/socket.c:1669 __do_sys_socket net/socket.c:1674 [inline] __se_sys_socket net/socket.c:1672 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1672 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807ace8300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807ace8380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807ace8400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807ace8480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807ace8500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================