IPVS: ftp: loaded support on port[0] = 21 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:380 [inline] BUG: KASAN: slab-out-of-bounds in __nla_put_nohdr+0x46/0x50 lib/nlattr.c:815 Read of size 12 at addr ffff88809a4fac80 by task syz-executor220/10287 CPU: 0 PID: 10287 Comm: syz-executor220 Not tainted 5.5.0-rc6-syzkaller #0 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+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 memcpy+0x24/0x50 mm/kasan/common.c:125 memcpy include/linux/string.h:380 [inline] __nla_put_nohdr+0x46/0x50 lib/nlattr.c:815 nla_put_nohdr+0xf9/0x140 lib/nlattr.c:881 tcf_em_tree_dump+0x67e/0x960 net/sched/ematch.c:471 basic_dump+0x379/0x690 net/sched/cls_basic.c:308 tcf_fill_node+0x58b/0x970 net/sched/cls_api.c:1814 tfilter_notify+0x134/0x290 net/sched/cls_api.c:1840 tc_new_tfilter+0xc18/0x2590 net/sched/cls_api.c:2108 rtnetlink_rcv_msg+0x824/0xaf0 net/core/rtnetlink.c:5420 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5447 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x753/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440dd9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd3d4cf868 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004a25b0 RCX: 0000000000440dd9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00000000006cc018 R08: 0000000120080522 R09: 0000000120080522 R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004022e0 R13: 0000000000402370 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 10287: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc_track_caller+0x15f/0x760 mm/slab.c:3671 kmemdup+0x27/0x60 mm/util.c:127 kmemdup include/linux/string.h:453 [inline] em_nbyte_change+0xd6/0x150 net/sched/em_nbyte.c:32 tcf_em_validate net/sched/ematch.c:241 [inline] tcf_em_tree_validate net/sched/ematch.c:359 [inline] tcf_em_tree_validate+0x9b5/0xf3c net/sched/ematch.c:300 basic_set_parms net/sched/cls_basic.c:157 [inline] basic_change+0x513/0x14a0 net/sched/cls_basic.c:219 tc_new_tfilter+0xbbd/0x2590 net/sched/cls_api.c:2104 rtnetlink_rcv_msg+0x824/0xaf0 net/core/rtnetlink.c:5420 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5447 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 ____sys_sendmsg+0x753/0x880 net/socket.c:2343 ___sys_sendmsg+0x100/0x170 net/socket.c:2397 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10031: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kfree+0x10a/0x2c0 mm/slab.c:3757 tomoyo_init_log+0x15a9/0x2070 security/tomoyo/audit.c:292 tomoyo_supervisor+0x33f/0xef0 security/tomoyo/common.c:2097 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_execute_permission+0x391/0x4a0 security/tomoyo/file.c:619 tomoyo_find_next_domain+0x348/0x1f6c security/tomoyo/domain.c:754 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:107 [inline] tomoyo_bprm_check_security+0x124/0x1a0 security/tomoyo/tomoyo.c:97 security_bprm_check+0x63/0xb0 security/security.c:784 search_binary_handler+0x71/0x570 fs/exec.c:1645 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.0+0x1329/0x22b0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1955 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88809a4fac80 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff88809a4fac80, ffff88809a4faca0) The buggy address belongs to the page: page:ffffea0002693e80 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809a4fafc1 raw: 00fffe0000000200 ffffea00026bc688 ffffea00026a7588 ffff8880aa4001c0 raw: ffff88809a4fafc1 ffff88809a4fa000 0000000100000019 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809a4fab80: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc ffff88809a4fac00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff88809a4fac80: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff88809a4fad00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff88809a4fad80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================