panic: pool_p_free: semupl free list modified: page 0xffffff001ca39000; item addr 0xffffff001ca39da8; offset 0x0=0xdeafbeae
Stopped at      db_enter+0xa:   popq    %rbp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*363496  57974      0     0x14000      0x200    0  systqmp
db_enter() at db_enter+0xa
panic() at panic+0x147
pool_p_free(ffffffff81e9b8f0,0) at pool_p_free+0x18e
pool_gc_pages(ffffffff81868930) at pool_gc_pages+0x1d5
taskq_thread(0) at taskq_thread+0x72
end trace frame: 0x0, count: 10
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb> 
ddb> trace
db_enter() at db_enter+0xa
panic() at panic+0x147
pool_p_free(ffffffff81e9b8f0,0) at pool_p_free+0x18e
pool_gc_pages(ffffffff81868930) at pool_gc_pages+0x1d5
taskq_thread(0) at taskq_thread+0x72
end trace frame: 0x0, count: -5
ddb> show registers
rdi               0xffffffff81dfa608    kprintf_mutex
rsi                              0x5
rbp               0xffff80000e257980
rbx               0xffff80000e257a20
rdx                            0x3fd
rcx                                0
rax                                0
r8                0xffff80000e257950
r9                0x8080808080808080
r10               0xffff80000e379058
r11               0xffffffff81a03df0    x86_bus_space_io_read_1
r12                     0x3000000008
r13               0xffff80000e257990
r14                            0x100
r15               0xffffffff81d916a4    inflate_table.dext+0x2c4
rip               0xffffffff811e5a5a    db_enter+0xa
cs                               0x8
rflags                         0x246
rsp               0xffff80000e257980
ss                              0x10
db_enter+0xa:   popq    %rbp