------------[ cut here ]------------
WARNING: CPU: 0 PID: 25870 at mm/percpu.c:891 pcpu_alloc+0x78a/0xab0 mm/percpu.c:891
illegal size (55768) or align (8) for percpu allocation
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 25870 Comm: syz-executor.1 Not tainted 4.9.168+ #40
 ffff88019bc27a00 ffffffff81b4f5d1 ffff88019bc27b00 ffffffff82a39ba0
 00000000ffffffff 0000000000000000 0000000000000009 ffff88019bc27ae0
 ffffffff813f945a 0000000041b58ab3 ffffffff82e2ec5a ffffffff813f9281
Call Trace:
 [<00000000dc6663e4>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000dc6663e4>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000946a9fe4>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<000000004c9fcbf5>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<00000000a2321007>] warn_slowpath_fmt+0xc2/0x100 kernel/panic.c:569
 [<000000004d5dba0f>] pcpu_alloc+0x78a/0xab0 mm/percpu.c:891
 [<0000000046a03298>] __alloc_percpu_gfp+0x28/0x30 mm/percpu.c:1066
 [<00000000ed87599d>] alloc_extra_elems kernel/bpf/hashtab.c:133 [inline]
 [<00000000ed87599d>] htab_map_alloc+0x74f/0xef0 kernel/bpf/hashtab.c:243
 [<0000000031d3f2b2>] find_and_alloc_map kernel/bpf/syscall.c:38 [inline]
 [<0000000031d3f2b2>] map_create kernel/bpf/syscall.c:259 [inline]
 [<0000000031d3f2b2>] SYSC_bpf kernel/bpf/syscall.c:1019 [inline]
 [<0000000031d3f2b2>] SyS_bpf+0x6fc/0x25d0 kernel/bpf/syscall.c:972
 [<0000000038c8e55a>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<0000000087a38ca9>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..