BUG: using smp_processor_id() in preemptible [00000000] code: syz.2.2373/12135
caller is bpf_mem_cache_free_rcu+0x48/0xc0 kernel/bpf/memalloc.c:960
CPU: 1 UID: 0 PID: 12135 Comm: syz.2.2373 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
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
 bpf_mem_cache_free_rcu+0x48/0xc0 kernel/bpf/memalloc.c:960
 rhtab_delete_elem+0x1826/0x1b00 kernel/bpf/hashtab.c:2983
 __rhtab_map_lookup_and_delete_batch+0x935/0xcb0 kernel/bpf/hashtab.c:3363
 bpf_map_do_batch+0x451/0x640 kernel/bpf/syscall.c:-1
 __sys_bpf+0x906/0xd90 kernel/bpf/syscall.c:-1
 __do_sys_bpf kernel/bpf/syscall.c:6489 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6486 [inline]
 __x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6486
 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: 0033:0x7f26cbc4e159
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:00007f26c9ea6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f26cbed5fa0 RCX: 00007f26cbc4e159
RDX: 0000000000000038 RSI: 00002000000018c0 RDI: 0000000000000019
RBP: 00007f26cbce506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26cbed6038 R14: 00007f26cbed5fa0 R15: 00007ffecc53f408
 </TASK>