================================================================== BUG: KASAN: use-after-free in ifname_compare_aligned include/linux/netfilter/x_tables.h:412 [inline] BUG: KASAN: use-after-free in ip_packet_match net/ipv4/netfilter/ip_tables.c:64 [inline] BUG: KASAN: use-after-free in ipt_do_table+0x762/0x17e0 net/ipv4/netfilter/ip_tables.c:285 Read of size 8 at addr ffff888026b30000 by task syz-executor.3/8771 CPU: 0 PID: 8771 Comm: syz-executor.3 Not tainted 5.19.0-rc7-syzkaller-00190-g70664fc10c0d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:313 print_report+0xf4/0x210 mm/kasan/report.c:429 kasan_report+0xfb/0x130 mm/kasan/report.c:491 ifname_compare_aligned include/linux/netfilter/x_tables.h:412 [inline] ip_packet_match net/ipv4/netfilter/ip_tables.c:64 [inline] ipt_do_table+0x762/0x17e0 net/ipv4/netfilter/ip_tables.c:285 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:620 nf_hook+0x26e/0x3d0 include/linux/netfilter.h:262 NF_HOOK_COND include/linux/netfilter.h:295 [inline] ip_mc_output+0x449/0x5b0 net/ipv4/ip_output.c:415 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] ip_send_skb+0x113/0x1a0 net/ipv4/ip_output.c:1571 udp_send_skb+0xa69/0x13f0 net/ipv4/udp.c:967 udp_sendmsg+0x1d30/0x2b00 net/ipv4/udp.c:1254 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2488 ___sys_sendmsg net/socket.c:2542 [inline] __sys_sendmmsg+0xa6f/0xd20 net/socket.c:2628 __do_sys_sendmmsg net/socket.c:2657 [inline] __se_sys_sendmmsg net/socket.c:2654 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2654 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f69ef089209 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f69f01ab168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f69ef19bf60 RCX: 00007f69ef089209 RDX: 0400000000000695 RSI: 0000000020007fc0 RDI: 0000000000000003 RBP: 00007f69ef0e3161 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe93d2fccf R14: 00007f69f01ab300 R15: 0000000000022000 Allocated by task 3648: 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:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:234 [inline] __kmalloc_node+0x262/0x400 mm/slub.c:4494 kmalloc_node include/linux/slab.h:623 [inline] kvmalloc_node+0x6e/0x160 mm/util.c:613 kvmalloc include/linux/slab.h:750 [inline] kvzalloc include/linux/slab.h:758 [inline] alloc_netdev_mqs+0x85/0xea0 net/core/dev.c:10584 rtnl_create_link+0x2db/0x9e0 net/core/rtnetlink.c:3241 rtnl_newlink_create net/core/rtnetlink.c:3353 [inline] __rtnl_newlink net/core/rtnetlink.c:3580 [inline] rtnl_newlink+0x13ec/0x2060 net/core/rtnetlink.c:3593 rtnetlink_rcv_msg+0x7c9/0xea0 net/core/rtnetlink.c:6089 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2501 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x439/0x5c0 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2127 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 8774: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0xd8/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1754 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1780 slab_free mm/slub.c:3536 [inline] kfree+0xc6/0x210 mm/slub.c:4584 device_release+0x98/0x1c0 kobject_cleanup+0x235/0x470 lib/kobject.c:673 netdev_run_todo+0xf9c/0x1090 net/core/dev.c:10366 vlan_ioctl_handler+0x49c/0x970 net/8021q/vlan.c:654 sock_ioctl+0x540/0x770 net/socket.c:1250 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888026b30000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 0 bytes inside of 4096-byte region [ffff888026b30000, ffff888026b31000) The buggy address belongs to the physical page: page:ffffea00009acc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26b30 head:ffffea00009acc00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011c4c280 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 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3648, tgid 3648 (syz-executor.3), ts 159571929447, free_ts 159571657022 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4198 __alloc_pages+0x259/0x560 mm/page_alloc.c:5426 alloc_slab_page+0x70/0xf0 mm/slub.c:1824 allocate_slab+0x5e/0x520 mm/slub.c:1969 new_slab mm/slub.c:2029 [inline] ___slab_alloc+0x42e/0xce0 mm/slub.c:3031 __slab_alloc mm/slub.c:3118 [inline] slab_alloc_node mm/slub.c:3209 [inline] __kmalloc_node+0x2c0/0x400 mm/slub.c:4490 kmalloc_node include/linux/slab.h:623 [inline] kvmalloc_node+0x6e/0x160 mm/util.c:613 kvmalloc include/linux/slab.h:750 [inline] kvzalloc include/linux/slab.h:758 [inline] alloc_netdev_mqs+0x85/0xea0 net/core/dev.c:10584 rtnl_create_link+0x2db/0x9e0 net/core/rtnetlink.c:3241 rtnl_newlink_create net/core/rtnetlink.c:3353 [inline] __rtnl_newlink net/core/rtnetlink.c:3580 [inline] rtnl_newlink+0x13ec/0x2060 net/core/rtnetlink.c:3593 rtnetlink_rcv_msg+0x7c9/0xea0 net/core/rtnetlink.c:6089 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2501 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x439/0x5c0 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2127 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x7d/0x390 mm/page_alloc.c:3438 free_slab mm/slub.c:2068 [inline] discard_slab mm/slub.c:2074 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2548 put_cpu_partial+0x116/0x180 mm/slub.c:2624 do_slab_free mm/slub.c:3524 [inline] ___cache_free+0x118/0x1a0 mm/slub.c:3543 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3243 [inline] slab_alloc mm/slub.c:3251 [inline] kmem_cache_alloc_trace+0x1db/0x310 mm/slub.c:3282 kmalloc include/linux/slab.h:600 [inline] rtnl_newlink+0xe6/0x2060 net/core/rtnetlink.c:3589 rtnetlink_rcv_msg+0x7c9/0xea0 net/core/rtnetlink.c:6089 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2501 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x439/0x5c0 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2127 Memory state around the buggy address: ffff888026b2ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888026b2ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888026b30000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888026b30080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888026b30100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================