panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 953
Starting stack trace...
panic(ffffffff83390337) at panic+464
__assert(ffffffff833d1747,ffffffff833e1a9d,3b9,ffffffff8340b65d) at __assert+41
refcnt_finalize(ffff80002a333530,ffffffff833868b5) at refcnt_finalize+475
pppx_if_destroy(285b9a,ffff80002a333528) at pppx_if_destroy+61
pppxclose(285b9a,41,2000,ffff80003c44cd30) at pppxclose+160
spec_close(ffff80003c421d10) at spec_close+1047
VOP_CLOSE(fffffd80631d4120,41,fffffd80097fb2d8,ffff80003c44cd30) at VOP_CLOSE+306
vn_closefile(fffffd806c01d678,ffff80003c44cd30) at vn_closefile+299
fdrop(fffffd806c01d678,ffff80003c44cd30) at fdrop+289
closef(fffffd806c01d678,ffff80003c44cd30) at closef+402
fdfree(ffff80003c44cd30) at fdfree+278
exit1(ffff80003c44cd30,0,0,1) at exit1+1398
sys_exit(ffff80003c44cd30,ffff80003c422080,ffff80003c421fd0) at sys_exit+26
syscall(ffff80003c422080) at syscall+2839
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0x75e7ad099330, count: 242
End of stack trace.