syzbot

BUG: using smp_processor_id() in preemptible [00000000] code: syz.0.17/5933
caller is bpf_mem_cache_free_rcu+0x41/0xb0 kernel/bpf/memalloc.c:954
CPU: 3 UID: 0 PID: 5933 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 check_preemption_disabled+0xd8/0xe0 lib/smp_processor_id.c:47
 bpf_mem_cache_free_rcu+0x41/0xb0 kernel/bpf/memalloc.c:954
 rhtab_delete_elem+0x96f/0x24e0 kernel/bpf/hashtab.c:2969
 __rhtab_map_lookup_and_delete_batch+0x925/0xf40 kernel/bpf/hashtab.c:3349
 bpf_map_do_batch+0x2b2/0x6d0 kernel/bpf/syscall.c:5830
 __sys_bpf+0xeb8/0x4e80 kernel/bpf/syscall.c:6483
 __do_sys_bpf kernel/bpf/syscall.c:6537 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6534 [inline]
 __x64_sys_bpf+0xce/0x140 kernel/bpf/syscall.c:6534
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33aab9de59
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:00007fff79abbf18 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f33aae25fa0 RCX: 00007f33aab9de59
RDX: 0000000000000038 RSI: 00002000000018c0 RDI: 0000000000000019
RBP: 00007f33aac33e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33aae25fac R14: 00007f33aae25fa0 R15: 00007f33aae25fa0
 </TASK>