syzbot

 non-slab/vmalloc memory
list_del corruption. prev->next should be ffff888028878200, but was ffffffff8e940fc0. (prev=ffffffff8e940fc0)
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kernel BUG at lib/list_debug.c:64!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6308 Comm: syz.3.231 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 1b 29 74 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 9c 30 95 fd 49 8b 17 48 c7 c7 80 c9 9e 8b 48 89 de 4c 89 f9 e8 67 95 99 fc 90 <0f> 0b 4c 89 f7 e8 ec 28 74 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 6d
RSP: 0018:ffffc90003e6e740 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff888028878200 RCX: b532cdd832cb2600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff920007cdd3a R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1b7a118 R12: 1ffffffff1d281f8
R13: dffffc0000000000 R14: ffffffff8e940fc0 R15: ffffffff8e940fc0
FS:  000055556c292500(0000) GS:ffff88812649b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30a63fff CR3: 0000000077f04000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 flow_block_cb_setup_simple+0x62d/0x740 net/core/flow_offload.c:369
 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+0x40d/0x1b60 net/netfilter/nf_tables_offload.c:592
 nf_tables_commit+0x675/0x8710 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:1320 [inline]
 netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x219/0x270 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/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f13c218eec9
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:00007ffe2cb63208 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f13c23e5fa0 RCX: 00007f13c218eec9
RDX: 000000000000c050 RSI: 0000200000000cc0 RDI: 0000000000000003
RBP: 00007f13c2211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f13c23e5fa0 R14: 00007f13c23e5fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x15a/0x190 lib/list_debug.c:62
Code: e8 1b 29 74 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 9c 30 95 fd 49 8b 17 48 c7 c7 80 c9 9e 8b 48 89 de 4c 89 f9 e8 67 95 99 fc 90 <0f> 0b 4c 89 f7 e8 ec 28 74 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 6d
RSP: 0018:ffffc90003e6e740 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff888028878200 RCX: b532cdd832cb2600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffff920007cdd3a R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1b7a118 R12: 1ffffffff1d281f8
R13: dffffc0000000000 R14: ffffffff8e940fc0 R15: ffffffff8e940fc0
FS:  000055556c292500(0000) GS:ffff88812649b000(0000) knlGS:0000000000000000