================================================================== BUG: KASAN: slab-out-of-bounds in dsa_user_to_port net/dsa/user.h:58 [inline] BUG: KASAN: slab-out-of-bounds in dsa_user_changeupper+0x61a/0x6e0 net/dsa/user.c:2809 Read of size 8 at addr ffff88801bb3cc90 by task syz-executor.1/12052 CPU: 2 PID: 12052 Comm: syz-executor.1 Not tainted 6.7.0-syzkaller-11705-gb0d326da462e #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 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:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 dsa_user_to_port net/dsa/user.h:58 [inline] dsa_user_changeupper+0x61a/0x6e0 net/dsa/user.c:2809 dsa_user_netdevice_event+0xd04/0x3480 net/dsa/user.c:3345 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x130 net/core/dev.c:1966 __netdev_upper_dev_link+0x439/0x850 net/core/dev.c:7759 netdev_upper_dev_link+0x92/0xc0 net/core/dev.c:7800 register_vlan_dev+0x396/0x940 net/8021q/vlan.c:183 register_vlan_device net/8021q/vlan.c:277 [inline] vlan_ioctl_handler+0x8dd/0xa70 net/8021q/vlan.c:621 sock_ioctl+0x4bd/0x6b0 net/socket.c:1305 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fd343a7cda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd3448b60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd343babf80 RCX: 00007fd343a7cda9 RDX: 0000000020000000 RSI: 0000000000008982 RDI: 0000000000000003 RBP: 00007fd343ac947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fd343babf80 R15: 00007ffd4cf53868 Allocated by task 5201: kasan_save_stack+0x33/0x50 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:389 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3981 [inline] __kmalloc_node+0x21b/0x460 mm/slub.c:3988 kmalloc_node include/linux/slab.h:610 [inline] kvmalloc_node+0x99/0x1a0 mm/util.c:617 kvmalloc include/linux/slab.h:728 [inline] kvzalloc include/linux/slab.h:736 [inline] alloc_netdev_mqs+0xb3/0x12a0 net/core/dev.c:10826 rtnl_create_link+0xc82/0xfb0 net/core/rtnetlink.c:3379 rtnl_newlink_create net/core/rtnetlink.c:3505 [inline] __rtnl_newlink+0x10a1/0x1940 net/core/rtnetlink.c:3735 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3748 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6615 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x225/0x310 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff88801bb3c000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 3216 bytes inside of allocated 3223-byte region [ffff88801bb3c000, ffff88801bb3cc97) The buggy address belongs to the physical page: page:ffffea00006ece00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bb38 head:ffffea00006ece00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888013050280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 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 5196, tgid 5196 (syz-executor.3), ts 153602537471, free_ts 153586873430 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2407 ___slab_alloc+0x4af/0x19a0 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] kmalloc_trace+0x30b/0x340 mm/slub.c:4007 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] snmp6_alloc_dev net/ipv6/addrconf.c:356 [inline] ipv6_add_dev+0x586/0x13d0 net/ipv6/addrconf.c:406 addrconf_notify+0x542/0x18f0 net/ipv6/addrconf.c:3593 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x130 net/core/dev.c:1966 call_netdevice_notifiers_extack net/core/dev.c:2004 [inline] call_netdevice_notifiers net/core/dev.c:2018 [inline] register_netdevice+0x16e2/0x1da0 net/core/dev.c:10294 rtnl_newlink_create net/core/rtnetlink.c:3517 [inline] __rtnl_newlink+0x161c/0x1940 net/core/rtnetlink.c:3735 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3748 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6615 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 page last free pid 5196 tgid 5196 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x51f/0xb10 mm/page_alloc.c:2346 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486 qlink_free mm/kasan/quarantine.c:160 [inline] qlist_free_all+0x58/0x150 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:324 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmalloc_trace+0x148/0x340 mm/slub.c:4007 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] ref_tracker_alloc+0x17c/0x5a0 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4147 [inline] netdev_hold include/linux/netdevice.h:4176 [inline] netdev_hold include/linux/netdevice.h:4171 [inline] netdev_queue_add_kobject net/core/net-sysfs.c:1703 [inline] netdev_queue_update_kobjects+0x1b3/0x520 net/core/net-sysfs.c:1758 register_queue_kobjects net/core/net-sysfs.c:1819 [inline] netdev_register_kobject+0x28c/0x3e0 net/core/net-sysfs.c:2059 register_netdevice+0x1385/0x1da0 net/core/dev.c:10261 team_newlink+0x92/0x160 drivers/net/team/team.c:2217 rtnl_newlink_create net/core/rtnetlink.c:3515 [inline] __rtnl_newlink+0x118a/0x1940 net/core/rtnetlink.c:3735 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3748 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6615 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367 Memory state around the buggy address: ffff88801bb3cb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801bb3cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801bb3cc80: 00 00 07 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801bb3cd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801bb3cd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================