panic: timeout_add: to_ticks (-973078528) < 0
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*111431  60519      0           0  0x4000000    0  syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399
panic() at panic+0x15c sys/kern/subr_prf.c:208
timeout_add(ffff800000669260,c6000000) at timeout_add+0x179 sys/kern/kern_timeout.c:190
pcppi_bell(ffff800000669200,9,c6000000,1) at pcppi_bell+0x2a0 sys/dev/isa/pcppi.c:234
spkrioctl(1b00,80085301,ffff8000149f4a60,2,ffff80001495c010) at spkrioctl+0x123 tone sys/dev/isa/spkr.c:89 [inline]
spkrioctl(1b00,80085301,ffff8000149f4a60,2,ffff80001495c010) at spkrioctl+0x123 sys/dev/isa/spkr.c:489
VOP_IOCTL(fffffd803e76a070,80085301,ffff8000149f4a60,2,fffffd803f7c7c00,ffff80001495c010) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290
vn_ioctl(fffffd8030060bc8,80085301,ffff8000149f4a60,ffff80001495c010) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512
sys_ioctl(ffff80001495c010,ffff8000149f4ba8,ffff8000149f4b90) at sys_ioctl+0x62d
syscall(ffff8000149f4c40) at syscall+0x535
Xsyscall(6,0,ffffffffffffff88,0,3,628c465c010) at Xsyscall+0x128
end of kernel
end trace frame: 0x62ae85582f0, count: 5
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