login: panic: timeout_add: to_ticks (-409500) < 0
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 55971  11973      0           0          0    1K syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x174 sys/kern/subr_prf.c:208
timeout_add(ffff800020b147b0,fff9c064) at timeout_add+0x194 sys/kern/kern_timeout.c:190
msleep(ffff80000091d200,ffff80000091d208,11a,ffffffff81f93f9b,fff9c064) at msleep+0xdd sys/kern/kern_synch.c:210
bpfread(31700,ffff800020c07930,0) at bpfread+0x23f sys/net/bpf.c:486
spec_read(ffff800020c07770) at spec_read+0xfd sys/kern/spec_vnops.c:223
VOP_READ(fffffd8079ffeca0,ffff800020c07930,0,fffffd807f7c68a0) at VOP_READ+0x6f sys/kern/vfs_vops.c:247
vn_read(fffffd806d07aac0,ffff800020c07930,0) at vn_read+0x1c3 sys/kern/vfs_vnops.c:365
dofilereadv(ffff800020b14710,3,ffff800020c07930,0,ffff800020c07a10) at dofilereadv+0x19f sys/kern/sys_generic.c:236
sys_read(ffff800020b14710,ffff800020c07a28,ffff800020c07a10) at sys_read+0x92 sys/kern/sys_generic.c:156
syscall(ffff800020c07ac0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
syscall(ffff800020c07ac0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
Xsyscall(6,0,ffffffffffffffb9,0,3,51eef76d010) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff6d10, count: 3
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{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
timeout_add: to_ticks (-409500) < 0
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x174 sys/kern/subr_prf.c:208
timeout_add(ffff800020b147b0,fff9c064) at timeout_add+0x194 sys/kern/kern_timeout.c:190
msleep(ffff80000091d200,ffff80000091d208,11a,ffffffff81f93f9b,fff9c064) at msleep+0xdd sys/kern/kern_synch.c:210
bpfread(31700,ffff800020c07930,0) at bpfread+0x23f sys/net/bpf.c:486
spec_read(ffff800020c07770) at spec_read+0xfd sys/kern/spec_vnops.c:223
VOP_READ(fffffd8079ffeca0,ffff800020c07930,0,fffffd807f7c68a0) at VOP_READ+0x6f sys/kern/vfs_vops.c:247
vn_read(fffffd806d07aac0,ffff800020c07930,0) at vn_read+0x1c3 sys/kern/vfs_vnops.c:365
dofilereadv(ffff800020b14710,3,ffff800020c07930,0,ffff800020c07a10) at dofilereadv+0x19f sys/kern/sys_generic.c:236
sys_read(ffff800020b14710,ffff800020c07a28,ffff800020c07a10) at sys_read+0x92 sys/kern/sys_generic.c:156
syscall(ffff800020c07ac0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
syscall(ffff800020c07ac0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
Xsyscall(6,0,ffffffffffffffb9,0,3,51eef76d010) at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff6d10, count: -12
ddb{1}> show registers
rdi                                0
rsi                              0x1
rbp               0xffff800020c07490
rbx               0xffff800020c07540
rdx               0xffffffff81f8bb72    apollo_pio_rec+0x9b0d
rcx                            0x201
rax                              0x1
r8                0xffffffff8106e1a3    kprintf+0x183
r9                               0x1
r10               0x3aa8478f1a253452
r11               0xf8230309f0bb2bda
r12                     0x3000000008
r13               0xffff800020c074a0
r14                            0x100
r15                              0x1
rip               0xffffffff819c3ce8    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff800020c07480
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=55971 stat=onproc
    flags process=0 proc=0
    pri=26, usrpri=52, nice=20
    forw=0x0, list=0xffff800020b144b8,0xffffffff823811f0
    process=0xffff800020b8d3c8 user=0xffff800020c02000, vmspace=0xfffffd807effeb40
    estcpu=21, cpticks=0, pctcpu=0.0
    user=0, sys=0, intr=0
ddb{1}>