syzbot

BUG: using smp_processor_id() in preemptible [00000000] code: syz.3.1377/11941
caller is cpu_mt+0x53/0xd0 net/netfilter/xt_cpu.c:37
CPU: 1 UID: 0 PID: 11941 Comm: syz.3.1377 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 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
 sctp_packet_transmit+0x246f/0x2ac0 net/sctp/output.c:653
 sctp_packet_singleton+0x234/0x340 net/sctp/outqueue.c:783
 sctp_outq_flush_ctrl net/sctp/outqueue.c:914 [inline]
 sctp_outq_flush+0x50d/0x31b0 net/sctp/outqueue.c:1212
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:-1 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1204 [inline]
 sctp_do_sm+0x54c7/0x5cf0 net/sctp/sm_sideeffect.c:1175
 sctp_primitive_ASSOCIATE+0x95/0xc0 net/sctp/primitive.c:73
 sctp_sendmsg_to_asoc+0x143d/0x1900 net/sctp/socket.c:1840
 sctp_sendmsg+0x1b3d/0x2c10 net/sctp/socket.c:2030
 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: 0033:0x7ff6e519ce59
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:00007ff6e33f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff6e5415fa0 RCX: 00007ff6e519ce59
RDX: 00000000000480d1 RSI: 0000200000000140 RDI: 0000000000000003
RBP: 00007ff6e5232d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff6e5416038 R14: 00007ff6e5415fa0 R15: 00007ffdfe9dd548
 </TASK>