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WARNING: CPU: 1 PID: 31065 at mm/percpu.c:891 pcpu_alloc+0x78a/0xab0 mm/percpu.c:891
illegal size (524456) or align (8) for percpu allocation
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 31065 Comm: syz-executor.1 Not tainted 4.9.165+ #28
 ffff8801a83bfa00 ffffffff81b4baf1 ffff8801a83bfb00 ffffffff82a39ba0
 00000000ffffffff 0000000000000001 0000000000000009 ffff8801a83bfae0
 ffffffff813f90fa 0000000041b58ab3 ffffffff82e2e7da ffffffff813f8f21
Call Trace:
 [<ffffffff81b4baf1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b4baf1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813f90fa>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<ffffffff813f933b>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<ffffffff810daae2>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:569
 [<ffffffff81479f9a>] pcpu_alloc+0x78a/0xab0 mm/percpu.c:891
 [<ffffffff8147a2e8>] __alloc_percpu_gfp+0x28/0x30 mm/percpu.c:1066
 [<ffffffff813b276f>] alloc_extra_elems kernel/bpf/hashtab.c:133 [inline]
 [<ffffffff813b276f>] htab_map_alloc+0x74f/0xef0 kernel/bpf/hashtab.c:243
 [<ffffffff8139c1cc>] find_and_alloc_map kernel/bpf/syscall.c:38 [inline]
 [<ffffffff8139c1cc>] map_create kernel/bpf/syscall.c:259 [inline]
 [<ffffffff8139c1cc>] SYSC_bpf kernel/bpf/syscall.c:1019 [inline]
 [<ffffffff8139c1cc>] SyS_bpf+0x6fc/0x25d0 kernel/bpf/syscall.c:972
 [<ffffffff810056bd>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<ffffffff8280c213>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..