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panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 951
Starting stack trace...
panic(ffffffff834358e3) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833dfa57,ffffffff8332afbf,3b7,ffffffff833e3d20) at __assert+0x29 sys/kern/subr_prf.c:-1
refcnt_finalize(ffff80002a8b30c0,ffffffff8332ed97) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:952
pppx_if_destroy(0,ffff80002a8b30b8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794
pppxclose(205b92,41,2000,ffff80002a7bcpckbd_enable: co7mmand error
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pck)bd_enable: comma nd error
pckbda_enable: commandt error
pckbd_e nable: command eprror
pppx: unapble to set addrepsses for pppx1, xerror=17
deniecd attempt to setl clock back 2 seoconds
pckbd_ensable: command ereror
pckbd_enab+le: command erro0r
pckbd_enablex: command errora
pppx: unable t0o set addresses 
for pppx1, error=17
pckbd_enable: command errosr
pckbd_enablep: command errore
pppx: unable tco set addresses _for pppx1, errorc=17
pppx: unablle to set addresoses for pppx1, esrror=17
fuse: eCannot find fuse(buf
denied attfempt to set clocfk back 159383573f seconds
mallofc(): allocation 8too large, type 0= 6, size = 561003010304
pppx: 0unable to set ad3dresses for pppxc1, error=17
pc9kbd_enable: comm5and error
pppxa: unable to set caddresses for pp0px1, error=17
0pppx: unable to )set addresses fo r pppx2, error=1a7

t spec_close+0x412
VOP_CLOSE(fffffd80681ebcc0,41,fffffd8007bfb680,ffff80002a7bc7c8) at VOP_CLOSE+0x12a sys/kern/vfs_vops.c:156
vn_closefile(fffffd806b54b4c0,ffff80002a7bc7c8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806b54b4c0,ffff80002a7bc7c8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd806b54b4c0,ffff80002a7bc7c8) at fdrop+0x126 sys/kern/kern_descrip.c:1267
closef(fffffd806b54b4c0,ffff80002a7bc7c8) at closef+0x18d sys/kern/kern_descrip.c:1251
fdfree(ffff80002a7bc7c8) at fdfree+0x115 sys/kern/kern_descrip.c:1182
exit1(ffff80002a7bc7c8,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215
sys_exit(ffff80002a7bc7c8,ffff80003c95af70,ffff80003c95aec0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c95af70) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c95af70) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x71ac20525640, count: 242
End of stack trace.
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