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 ffff8880a76235c0 by task syz-executor141/9830 CPU: 1 PID: 9830 Comm: syz-executor141 Not tainted 5.5.0-rc7-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:5415 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5442 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x753/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424 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:00007ffcf40c80b8 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 9830: 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:5415 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5442 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 ____sys_sendmsg+0x753/0x880 net/socket.c:2330 ___sys_sendmsg+0x100/0x170 net/socket.c:2384 __sys_sendmsg+0x105/0x1d0 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2424 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9557: 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_check_open_permission+0x19e/0x3e0 security/tomoyo/file.c:786 tomoyo_file_open security/tomoyo/tomoyo.c:319 [inline] tomoyo_file_open+0xa9/0xd0 security/tomoyo/tomoyo.c:314 security_file_open+0x71/0x300 security/security.c:1497 do_dentry_open+0x37a/0x1380 fs/open.c:784 vfs_open+0xa0/0xd0 fs/open.c:914 do_last fs/namei.c:3356 [inline] path_openat+0x118b/0x3180 fs/namei.c:3473 do_filp_open+0x1a1/0x280 fs/namei.c:3503 do_sys_open+0x3fe/0x5d0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1110 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 ffff8880a76235c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a76235c0, ffff8880a76235e0) The buggy address belongs to the page: page:ffffea00029d88c0 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff8880a7623fc1 raw: 00fffe0000000200 ffffea00029cb2c8 ffffea0002921dc8 ffff8880aa4001c0 raw: ffff8880a7623fc1 ffff8880a7623000 000000010000002e 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a7623480: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a7623500: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880a7623580: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc ^ ffff8880a7623600: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a7623680: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================