================================================================== 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 ffff88803635ec90 by task syz-executor.5/12649 CPU: 1 PID: 12649 Comm: syz-executor.5 Not tainted 6.7.0-syzkaller-04629-g3e7aeb78ab01 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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: 0033:0x7efeb847cda9 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:00007efeb91470c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007efeb85abf80 RCX: 00007efeb847cda9 RDX: 00000000200000c0 RSI: 0000000000008982 RDI: 0000000000000003 RBP: 00007efeb84c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007efeb85abf80 R15: 00007ffcbb6871f8 Allocated by task 11212: 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 ffff88803635e000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 3216 bytes inside of allocated 3223-byte region [ffff88803635e000, ffff88803635ec97) The buggy address belongs to the physical page: page:ffffea0000d8d600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x36358 head:ffffea0000d8d600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff8880381aec81 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff88801304f500 ffffea0000856000 dead000000000002 raw: 0000000000000000 0000000000040004 00000001ffffffff ffff8880381aec81 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 2271, tgid 2271 (udevd), ts 663400316236, free_ts 562171918254 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] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc_node+0x35d/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] seq_buf_alloc fs/seq_file.c:38 [inline] seq_read_iter+0x80b/0x1280 fs/seq_file.c:210 kernfs_fop_read_iter+0x410/0x580 fs/kernfs/file.c:279 call_read_iter include/linux/fs.h:2079 [inline] new_sync_read fs/read_write.c:395 [inline] vfs_read+0x4d4/0x8f0 fs/read_write.c:476 ksys_read+0x12f/0x250 fs/read_write.c:619 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 page last free pid 5150 tgid 5150 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 kasan_depopulate_vmalloc_pte+0x63/0x80 mm/kasan/shadow.c:415 apply_to_pte_range mm/memory.c:2619 [inline] apply_to_pmd_range mm/memory.c:2663 [inline] apply_to_pud_range mm/memory.c:2699 [inline] apply_to_p4d_range mm/memory.c:2735 [inline] __apply_to_page_range+0x57e/0xdb0 mm/memory.c:2769 kasan_release_vmalloc+0xa8/0xc0 mm/kasan/shadow.c:532 __purge_vmap_area_lazy+0x8b9/0x2170 mm/vmalloc.c:1770 drain_vmap_area_work+0x54/0xd0 mm/vmalloc.c:1804 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Memory state around the buggy address: ffff88803635eb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88803635ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88803635ec80: 00 00 07 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88803635ed00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88803635ed80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================