BUG: using smp_processor_id() in preemptible [00000000] code: syz.0.1676/10528
caller is bpf_mem_cache_free_rcu+0x41/0xb0 kernel/bpf/memalloc.c:960
CPU: 0 UID: 0 PID: 10528 Comm: syz.0.1676 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 check_preemption_disabled+0xd2/0xe0 lib/smp_processor_id.c:47
 bpf_mem_cache_free_rcu+0x41/0xb0 kernel/bpf/memalloc.c:960
 rhtab_delete_elem+0x90f/0x2420 kernel/bpf/hashtab.c:2983
 __rhtab_map_lookup_and_delete_batch+0x925/0xf40 kernel/bpf/hashtab.c:3363
 bpf_map_do_batch+0x2b2/0x6d0 kernel/bpf/syscall.c:5779
 __sys_bpf+0xa99/0x4a30 kernel/bpf/syscall.c:6435
 __do_sys_bpf kernel/bpf/syscall.c:6489 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6486 [inline]
 __x64_sys_bpf+0xce/0x140 kernel/bpf/syscall.c:6486
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c41f9e159
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:00007f5c42ddd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f5c42225fa0 RCX: 00007f5c41f9e159
RDX: 0000000000000038 RSI: 00002000000018c0 RDI: 0000000000000019
RBP: 00007f5c4203506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5c42226038 R14: 00007f5c42225fa0 R15: 00007ffe6ef85068
 </TASK>