panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_synch.c", line 953
Starting stack trace...
panic(ffffffff833943a7) at panic+464
__assert(ffffffff833d16ba,ffffffff833e4470,3b9,ffffffff8340e057) at __assert+41
refcnt_finalize(ffff80003c4f6948,ffffffff83384e88) at refcnt_finalize+475
pppx_if_destroy(0,ffff80003c4f6940) at pppx_if_destroy+61
pppxclose(285b9a,41,2000,ffff80003a823790) at pppxclose+160
spec_close(ffff80002a308070) at spec_close+1047
VOP_CLOSE(fffffd805a5cd960,41,fffffd80097fb6e8,ffff80003a823790) at VOP_CLOSE+306
vn_closefile(fffffd8067f930f0,ffff80003a823790) at vn_closefile+299
fdrop(fffffd8067f930f0,ffff80003a823790) at fdrop+289
closef(fffffd8067f930f0,ffff80003a823790) at closef+402
fdfree(ffff80003a823790) at fdfree+278
exit1(ffff80003a823790,0,0,1) at exit1+1398
sys_exit(ffff80003a823790,ffff80002a3083e0,ffff80002a308330) at sys_exit+26
syscall(ffff80002a3083e0) at syscall+2839
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0x75faf3da2530, count: 242
End of stack trace.