panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 953
Starting stack trace...
panic(ffffffff83394ffb) at panic+464
__assert(ffffffff833d3acc,ffffffff833de77f,3b9,ffffffff83408422) at __assert+41
refcnt_finalize(ffff80003c4434f8,ffffffff8338daa7) at refcnt_finalize+475
pppx_if_destroy(285b9a,ffff80003c4434f0) at pppx_if_destroy+61
pppxclose(285b9a,41,2000,ffff800039006d20) at 
pppxclose+160
spec_close(ffff80002a279320) at spec_close+1047
VOP_CLOSE(fffffd80759002a8,41,fffffd80097fb0d0,ffff800039006d20) at VOP_CLOSE+306
vn_closefile(fffffd8074fa42b8,ffff800039006d20) at vn_closefile+299
fdrop(fffffd8074fa42b8,ffff800039006d20) at fdrop+289
closef(fffffd8074fa42b8,ffff800039006d20) at closef+402
fdfree(ffff800039006d20) at fdfree+278
exit1(ffff800039006d20,0,0,1) at exit1+1398
sys_exit(ffff800039006d20,ffff80002a279690,ffff80002a2795e0) at sys_exit+26
syscall(ffff80002a279690) at syscall+2839
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0x78bdf73dbab0, count: 242
End of stack trace.
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