panic: chgproccnt: procs < 0
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 503038   9368      0        0x10          0    1  syz-executor
*324115   9368      0        0x10  0x4000000    0K syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8355df8b) at panic+0x1e5 sys/kern/subr_prf.c:198
chgproccnt(ee00,ffffffff) at chgproccnt+0xcc
sys_setuid(ffff80002a22c7d8,ffff80002a3183c0,ffff80002a318310) at sys_setuid+0x2d9 sys/kern/kern_prot.c:746
syscall(ffff80002a3183c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3183c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe018bbed580, count: 9
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{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: chgproccnt: procs < 0
ddb{0}>