BUG: using smp_processor_id() in preemptible [00000000] code: syz.0.6547/27943 caller is cpu_mt+0x53/0xd0 net/netfilter/xt_cpu.c:37 CPU: 1 UID: 0 PID: 27943 Comm: syz.0.6547 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 check_preemption_disabled+0xd3/0xe0 lib/smp_processor_id.c:47 cpu_mt+0x53/0xd0 net/netfilter/xt_cpu.c:37 __nft_match_eval net/netfilter/nft_compat.c:412 [inline] nft_match_eval+0x1ad/0x2b0 net/netfilter/nft_compat.c:442 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline] nft_do_chain+0x48d/0x1ae0 net/netfilter/nf_tables_core.c:285 nft_do_chain_inet+0x360/0x4b0 net/netfilter/nft_chain_filter.c:162 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook+0x22a/0x3a0 include/linux/netfilter.h:273 NF_HOOK_COND include/linux/netfilter.h:306 [inline] ip_output+0x269/0x450 net/ipv4/ip_output.c:438 __ip_queue_xmit+0x116a/0x1bb0 net/ipv4/ip_output.c:534 __tcp_transmit_skb+0x2d76/0x4790 net/ipv4/tcp_output.c:1715 tcp_transmit_skb net/ipv4/tcp_output.c:1733 [inline] tcp_send_syn_data net/ipv4/tcp_output.c:4283 [inline] tcp_connect+0x34a5/0x53a0 net/ipv4/tcp_output.c:4372 tcp_v4_connect+0x10f7/0x19b0 net/ipv4/tcp_ipv4.c:345 __inet_stream_connect+0x25a/0xdd0 net/ipv4/af_inet.c:684 tcp_sendmsg_fastopen+0x3a7/0x5e0 net/ipv4/tcp.c:1089 tcp_sendmsg_locked+0x4a88/0x5360 net/ipv4/tcp.c:1185 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1455 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x80a/0x9f0 net/socket.c:2698 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 __sys_sendmsg net/socket.c:2784 [inline] __do_sys_sendmsg net/socket.c:2789 [inline] __se_sys_sendmsg net/socket.c:2787 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f50c399ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f50c1bf6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f50c3c15fa0 RCX: 00007f50c399ce59 RDX: 000000003000c085 RSI: 0000200000000080 RDI: 0000000000000006 RBP: 00007f50c3a32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f50c3c16038 R14: 00007f50c3c15fa0 R15: 00007ffe152e1838