 non-slab/vmalloc memory
list_add corruption. next->prev should be prev (ffffffff8eb5f420), but was ffffffff8eb5f420. (next=ffffffff8eb5f420).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:31!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8724 Comm: syz.0.1377 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: 39 71 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 23 01 93 fd 48 8b 53 08 48 c7 c7 20 06 bf 8b 4c 89 f6 48 89 d9 e8 2d d9 94 fc 90 <0f> 0b 4c 89 f7 e8 f2 38 71 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 f3
RSP: 0018:ffffc90004366698 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffffff8eb5f420 RCX: 7c7c67c569513200
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1d6be85 R08: ffffc900043663c7 R09: 1ffff9200086cc78
R10: dffffc0000000000 R11: fffff5200086cc79 R12: ffffffff8eb5f428
R13: dffffc0000000000 R14: ffffffff8eb5f420 R15: ffff8881b435dd00
FS:  00007ff97ee9c6c0(0000) GS:ffff8882a9f40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555591b65808 CR3: 00000001730f6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add_tail include/linux/list.h:191 [inline]
 flow_block_cb_setup_simple+0x4f2/0x740 net/core/flow_offload.c:361
 nft_block_offload_cmd net/netfilter/nf_tables_offload.c:397 [inline]
 nft_chain_offload_cmd+0x293/0x660 net/netfilter/nf_tables_offload.c:451
 nft_flow_block_chain net/netfilter/nf_tables_offload.c:471 [inline]
 nft_flow_offload_chain net/netfilter/nf_tables_offload.c:513 [inline]
 nft_flow_rule_offload_commit+0x814/0x1b60 net/netfilter/nf_tables_offload.c:584
 nf_tables_commit+0x69b/0xa1b0 net/netfilter/nf_tables_api.c:10925
 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:576 [inline]
 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:649 [inline]
 nfnetlink_rcv+0x1ac9/0x2590 net/netfilter/nfnetlink.c:667
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 ____sys_sendmsg+0x505/0x830 net/socket.c:2630
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684
 __sys_sendmsg net/socket.c:2716 [inline]
 __do_sys_sendmsg net/socket.c:2721 [inline]
 __se_sys_sendmsg net/socket.c:2719 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff97df8efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff97ee9c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff97e1e5fa0 RCX: 00007ff97df8efc9
RDX: 0000000000000000 RSI: 000020000000c2c0 RDI: 0000000000000003
RBP: 00007ff97e011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff97e1e6038 R14: 00007ff97e1e5fa0 R15: 00007ffc5851ca08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: 39 71 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 23 01 93 fd 48 8b 53 08 48 c7 c7 20 06 bf 8b 4c 89 f6 48 89 d9 e8 2d d9 94 fc 90 <0f> 0b 4c 89 f7 e8 f2 38 71 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 f3
RSP: 0018:ffffc90004366698 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffffffff8eb5f420 RCX: 7c7c67c569513200
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1d6be85 R08: ffffc900043663c7 R09: 1ffff9200086cc78
R10: dffffc0000000000 R11: fffff5200086cc79 R12: ffffffff8eb5f428
R13: dffffc0000000000 R14: ffffffff8eb5f420 R15: ffff8881b435dd00
FS:  00007ff97ee9c6c0(0000) GS:ffff88818eb40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000390 CR3: 00000001730f6000 CR4: 00000000000006f0
