panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 953
Starting stack trace...
panic(ffffffff833616bc) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff8339c315,ffffffff833fde39,3b9,ffffffff833d7c7d) at __assert+0x29 sys/kern/subr_prf.c:-1
refcnt_finalize(ffff80003b933618,ffffffff8335408e) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954
pppx_if_destroy(ffff80003411a000,ffff80003b933610) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794
pppxc
lose(205b9a,1,2000,ffff800031503ca8) at pppxclose+0xa0 sys/net/if_pppx.c:541
spec_close(ffff80002f0ff3b0) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8067b03b08,1,fffffd8007bfb820,ffff800031503ca8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd807469b2e0,ffff800031503ca8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd807469b2e0,ffff800031503ca8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd807469b2e0,ffff800031503ca8) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd807469b2e0,ffff800031503ca8) at closef+0x190 sys/kern/kern_descrip.c:1264
syscall(ffff80002f0ff600) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002f0ff600) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf4bd60fada0, count: 245
End of stack trace.
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