BUG: using smp_processor_id() in preemptible [00000000] code: syz.4.629/7744
caller is net_dm_packet_trace_kfree_skb_hit+0xdf/0x350 net/core/drop_monitor.c:519
CPU: 0 UID: 0 PID: 7744 Comm: syz.4.629 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 check_preemption_disabled+0xcd/0xd0 lib/smp_processor_id.c:47
 net_dm_packet_trace_kfree_skb_hit+0xdf/0x350 net/core/drop_monitor.c:519
 __do_trace_kfree_skb include/trace/events/skb.h:24 [inline]
 trace_kfree_skb+0x1d1/0x210 include/trace/events/skb.h:24
 __sk_skb_reason_drop net/core/skbuff.c:1231 [inline]
 sk_skb_reason_drop+0xdd/0x110 net/core/skbuff.c:1249
 tcp_validate_incoming+0x181e/0x2440 net/ipv4/tcp_input.c:6468
 tcp_rcv_established+0xc29/0x2910 net/ipv4/tcp_input.c:6672
 tcp_v4_do_rcv+0x959/0x13f0 net/ipv4/tcp_ipv4.c:1854
 sk_backlog_rcv include/net/sock.h:1192 [inline]
 __release_sock+0x28e/0x3d0 net/core/sock.c:3263
 release_sock+0x1be/0x290 net/core/sock.c:3862
 do_tcp_setsockopt+0x198c/0x1f80 net/ipv4/tcp.c:4167
 do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2397
 __sys_setsockopt net/socket.c:2422 [inline]
 __do_sys_setsockopt net/socket.c:2428 [inline]
 __se_sys_setsockopt net/socket.c:2425 [inline]
 __x64_sys_setsockopt+0x143/0x1b0 net/socket.c:2425
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f32115fe159
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:00007f320f856028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f3211885fa0 RCX: 00007f32115fe159
RDX: 0000000000000013 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00007f321169506b R08: 0000000000000004 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3211886038 R14: 00007f3211885fa0 R15: 00007ffd1ba186a8
 </TASK>