IPVS: set_ctl: invalid protocol: 13703 39.52.93.236:60696 Ɓtpm`x/.HݼބDBC+ ================================================================== BUG: KASAN: slab-out-of-bounds in erspan_xmit+0x22d4/0x2430 net/ipv4/ip_gre.c:735 Read of size 2 at addr ffff8801d859fccb by task syz-executor0/31641 CPU: 0 PID: 31641 Comm: syz-executor0 Not tainted 4.15.0-rc8+ #204 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:440 erspan_xmit+0x22d4/0x2430 net/ipv4/ip_gre.c:735 __netdev_start_xmit include/linux/netdevice.h:4055 [inline] netdev_start_xmit include/linux/netdevice.h:4064 [inline] packet_direct_xmit+0x3ad/0x790 net/packet/af_packet.c:267 packet_snd net/packet/af_packet.c:2944 [inline] packet_sendmsg+0x3aed/0x60b0 net/packet/af_packet.c:2969 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1721 SyS_sendto+0x40/0x50 net/socket.c:1689 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x452f19 RSP: 002b:00007f0dbd3bfc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452f19 RDX: 0000000000000000 RSI: 0000000020003fd9 RDI: 0000000000000013 RBP: 00000000000005df R08: 0000000020008000 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f7d88 R13: 00000000ffffffff R14: 00007f0dbd3c06d4 R15: 0000000000000000 Allocated by task 31641: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 __do_kmalloc mm/slab.c:3708 [inline] __kmalloc+0x162/0x760 mm/slab.c:3717 kmalloc include/linux/slab.h:504 [inline] sk_prot_alloc+0x101/0x2a0 net/core/sock.c:1471 sk_alloc+0x105/0x1440 net/core/sock.c:1525 packet_create+0x163/0xb00 net/packet/af_packet.c:3213 __sock_create+0x4d4/0x850 net/socket.c:1259 sock_create net/socket.c:1299 [inline] SYSC_socket net/socket.c:1329 [inline] SyS_socket+0xeb/0x1d0 net/socket.c:1309 entry_SYSCALL_64_fastpath+0x29/0xa0 Freed by task 27724: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3488 [inline] kfree+0xd6/0x260 mm/slab.c:3803 kvfree+0x36/0x60 mm/util.c:416 __free_fdtable+0x31/0x70 fs/file.c:36 put_files_struct+0x28e/0x330 fs/file.c:425 exit_files+0x83/0xb0 fs/file.c:450 do_exit+0x994/0x1ad0 kernel/exit.c:860 do_group_exit+0x149/0x400 kernel/exit.c:968 get_signal+0x73f/0x16c0 kernel/signal.c:2335 do_signal+0x90/0x1eb0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264 entry_SYSCALL_64_fastpath+0x9e/0xa0 The buggy address belongs to the object at ffff8801d859f2c0 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 523 bytes to the right of 2048-byte region [ffff8801d859f2c0, ffff8801d859fac0) The buggy address belongs to the page: page:ffffea0007616780 count:1 mapcount:0 mapping:ffff8801d859e1c0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801d859e1c0 0000000000000000 0000000100000003 raw: ffffea00070ba4a0 ffffea0006f4d120 ffff8801dac00c40 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d859fb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801d859fc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801d859fc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801d859fd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801d859fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================