IPVS: ftp: loaded support on port[0] = 21 ================================================================== BUG: KASAN: use-after-free in inet_ctl_sock_destroy include/net/inet_common.h:56 [inline] BUG: KASAN: use-after-free in tcp_sk_exit+0x203/0x230 net/ipv4/tcp_ipv4.c:2588 Read of size 8 at addr ffff88805bf8fa14 by task kworker/u4:3/80 CPU: 0 PID: 80 Comm: kworker/u4:3 Not tainted 5.0.0-rc5+ #63 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135 inet_ctl_sock_destroy include/net/inet_common.h:56 [inline] tcp_sk_exit+0x203/0x230 net/ipv4/tcp_ipv4.c:2588 ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:153 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:551 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Allocated by task 4842: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc mm/kasan/common.c:504 [inline] kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:411 kmem_cache_alloc+0x12d/0x710 mm/slab.c:3543 sk_prot_alloc+0x67/0x2e0 net/core/sock.c:1567 sk_alloc+0x39/0xf70 net/core/sock.c:1627 inet_create net/ipv4/af_inet.c:321 [inline] inet_create+0x36a/0xe10 net/ipv4/af_inet.c:247 __sock_create+0x3e6/0x750 net/socket.c:1297 sock_create_kern+0x3b/0x50 net/socket.c:1343 inet_ctl_sock_create+0x9d/0x1f0 net/ipv4/af_inet.c:1614 icmp_sk_init net/ipv4/icmp.c:1203 [inline] icmp_sk_init+0x120/0x680 net/ipv4/icmp.c:1192 ops_init+0xb6/0x410 net/core/net_namespace.c:129 setup_net+0x2c5/0x730 net/core/net_namespace.c:314 copy_net_ns+0x1d9/0x340 net/core/net_namespace.c:437 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206 ksys_unshare+0x440/0x980 kernel/fork.c:2550 __do_sys_unshare kernel/fork.c:2618 [inline] __se_sys_unshare kernel/fork.c:2616 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2616 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 80: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466 __cache_free mm/slab.c:3487 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3749 sk_prot_free net/core/sock.c:1608 [inline] __sk_destruct+0x4b6/0x6d0 net/core/sock.c:1692 sk_destruct+0x7b/0x90 net/core/sock.c:1700 __sk_free+0xce/0x300 net/core/sock.c:1711 sk_free+0x42/0x50 net/core/sock.c:1722 sock_put include/net/sock.h:1708 [inline] sk_common_release+0x224/0x330 net/core/sock.c:3137 raw_close+0x22/0x30 net/ipv4/raw.c:708 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428 __sock_release+0x1d3/0x250 net/socket.c:579 sock_release+0x18/0x20 net/socket.c:598 inet_ctl_sock_destroy include/net/inet_common.h:56 [inline] icmp_sk_exit+0x11f/0x1f0 net/ipv4/icmp.c:1187 ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:153 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:551 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff88805bf8f700 which belongs to the cache RAW(81:syz2) of size 1320 The buggy address is located 788 bytes inside of 1320-byte region [ffff88805bf8f700, ffff88805bf8fc28) The buggy address belongs to the page: page:ffffea00016fe380 count:1 mapcount:0 mapping:ffff88808b6089c0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea0002832808 ffff88808f03e848 ffff88808b6089c0 raw: 0000000000000000 ffff88805bf8e000 0000000100000005 ffff8880691d2380 page dumped because: kasan: bad access detected page->mem_cgroup:ffff8880691d2380 Memory state around the buggy address: ffff88805bf8f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805bf8f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805bf8fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805bf8fa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805bf8fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================