panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 953
Starting stack trace...
panic(ffffffff83341bfb) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff8337bb4f,ffffffff833d92e4,3b9,ffffffff833b2f5c) at __assert+0x29 sys/kern/subr_prf.c:-1
refcnt_finalize(ffff800038147620,ffffffff833375d3) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954
pppx_if_destroy(ffff800035d42000,ffff800038147618) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794
pppxclose(205b92,41,2000,ffff80002a81f770) at pppxclose+0xa0 sys/net/if_pppx.c:541
spec_close(ffff80003c97eef0) at spec_close+0x
417
VOP_CLOSE(fffffd806ae418b8,41,fffffd8007bfb138,ffff80002a81f770) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806aedb100,ffff80002a81f770) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806aedb100,ffff80002a81f770) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd806aedb100,ffff80002a81f770) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806aedb100,ffff80002a81f770) at closef+0x190 sys/kern/kern_descrip.c:1264
syscall(ffff80003c97f140) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c97f140) at syscall+0x962 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd3a74ddc5e0, count: 245
End of stack trace.
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