IPVS: ftp: loaded support on port[0] = 21 ================================================================== BUG: KASAN: use-after-free in __write_once_size include/linux/compiler.h:218 [inline] BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:702 [inline] BUG: KASAN: use-after-free in hlist_del_init include/linux/list.h:717 [inline] BUG: KASAN: use-after-free in __xfrm_policy_unlink+0x977/0xa00 net/xfrm/xfrm_policy.c:2213 Write of size 8 at addr ffff8880a472da68 by task syz-executor5/29544 CPU: 1 PID: 29544 Comm: syz-executor5 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_store8_noabort+0x17/0x20 mm/kasan/report.c:438 __write_once_size include/linux/compiler.h:218 [inline] __hlist_del include/linux/list.h:702 [inline] hlist_del_init include/linux/list.h:717 [inline] __xfrm_policy_unlink+0x977/0xa00 net/xfrm/xfrm_policy.c:2213 xfrm_policy_flush+0x331/0x460 net/xfrm/xfrm_policy.c:1789 pfkey_spdflush+0xaf/0x3c0 net/key/af_key.c:2785 pfkey_process+0x6d2/0x810 net/key/af_key.c:2844 pfkey_sendmsg+0x5bb/0xfc0 net/key/af_key.c:3683 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116 __sys_sendmsg+0x112/0x270 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f620ba0cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f620ba0d6d4 R13: 00000000004c5305 R14: 00000000004d8d70 R15: 00000000ffffffff Allocated by task 29096: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 __do_kmalloc mm/slab.c:3722 [inline] __kmalloc+0x15d/0x750 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] sock_kmalloc net/core/sock.c:1992 [inline] sock_kmalloc+0x166/0x200 net/core/sock.c:1983 af_alg_alloc_areq+0x7c/0x300 crypto/af_alg.c:1097 _aead_recvmsg crypto/algif_aead.c:157 [inline] aead_recvmsg+0x49d/0x1b40 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg net/socket.c:801 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:797 sock_read_iter+0x3ba/0x5a0 net/socket.c:878 call_read_iter include/linux/fs.h:1851 [inline] do_iter_readv_writev+0x6f4/0xae0 fs/read_write.c:678 do_iter_read+0x268/0x650 fs/read_write.c:922 vfs_readv+0x175/0x1c0 fs/read_write.c:986 do_readv+0x11a/0x300 fs/read_write.c:1019 __do_sys_readv fs/read_write.c:1106 [inline] __se_sys_readv fs/read_write.c:1103 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1103 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 29096: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 kobject: 'tx-0' (0000000052ecb780): kobject_uevent_env __sock_kfree_s net/core/sock.c:2013 [inline] sock_kfree_s+0x29/0x70 net/core/sock.c:2019 af_alg_free_resources+0x71/0x90 crypto/af_alg.c:1033 _aead_recvmsg crypto/algif_aead.c:321 [inline] aead_recvmsg+0x979/0x1b40 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg net/socket.c:801 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:797 kobject: 'tx-0' (0000000052ecb780): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' sock_read_iter+0x3ba/0x5a0 net/socket.c:878 call_read_iter include/linux/fs.h:1851 [inline] do_iter_readv_writev+0x6f4/0xae0 fs/read_write.c:678 do_iter_read+0x268/0x650 fs/read_write.c:922 vfs_readv+0x175/0x1c0 fs/read_write.c:986 do_readv+0x11a/0x300 fs/read_write.c:1019 netlink: del zone limit has 4 unknown bytes __do_sys_readv fs/read_write.c:1106 [inline] __se_sys_readv fs/read_write.c:1103 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1103 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 kobject: 'tunl0' (000000006d1f64da): kobject_add_internal: parent: 'net', set: 'devices' entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a472d6c0 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 936 bytes inside of 1024-byte region [ffff8880a472d6c0, ffff8880a472dac0) The buggy address belongs to the page: page:ffffea000291cb00 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00017e2b08 ffffea0002408488 ffff88812c3f0ac0 raw: 0000000000000000 ffff8880a472c040 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a472d900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a472d980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880a472da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a472da80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880a472db00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ==================================================================