BUG: using smp_processor_id() in preemptible [00000000] code: syz.0.1048/9886
caller is debug_smp_processor_id+0x20/0x2c lib/smp_processor_id.c:58
CPU: 0 UID: 0 PID: 9886 Comm: syz.0.1048 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 check_preemption_disabled+0xdc/0xe0 lib/smp_processor_id.c:47
 debug_smp_processor_id+0x20/0x2c lib/smp_processor_id.c:58
 bpf_mem_cache_free_rcu+0x50/0xd8 kernel/bpf/memalloc.c:954
 rhtab_delete_elem+0x132c/0x16dc kernel/bpf/hashtab.c:2969
 __rhtab_map_lookup_and_delete_batch+0x7f0/0xbc4 kernel/bpf/hashtab.c:3349
 rhtab_map_lookup_and_delete_batch+0x38/0x4c kernel/bpf/hashtab.c:3390
 bpf_map_do_batch+0x368/0x4d0 kernel/bpf/syscall.c:-1
 __sys_bpf+0x850/0x8c8 kernel/bpf/syscall.c:-1
 __do_sys_bpf kernel/bpf/syscall.c:6537 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6534 [inline]
 __arm64_sys_bpf+0xc8/0xe4 kernel/bpf/syscall.c:6534
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594