panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 953
Starting stack trace...
panic(ffffffff83339fb8) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff8337b538,ffffffff833db32c,3b9,ffffffff833b51ca) at __assert+0x29 sys/kern/subr_prf.c:-1
refcnt_finalize(ffff80002cd2ab58,ffffffff833344a0) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954
pppx_if_destroy(ffff80002cd2c000,ffff80002cd2ab50) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794
pppxclose(205b9a,41,2000,ffff80002a7f4a80) at pppxclose+0xa0 sys/net/if_pppx.c:541
spec_close(ffff80003c9677d0) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd806c3c52c0,41,fffffd8007bfb5b0,ffff80002a7f4a80) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156
vn_closefile(fffffd807e1e59d8,ffff8
0002a7f4a80) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline]
0002a7f4a80) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615
fdrop(fffffd807e1e59d8,ffff80002a7f4a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd807e1e59d8,ffff80002a7f4a80) at closef+0x190 sys/kern/kern_descrip.c:1264
finishdup(ffff80002a7f4a80,fffffd807e1e5618,6,4,ffff80003c967a20,2) at finishdup+0x46d sys/kern/kern_descrip.c:688
syscall(ffff80003c967ad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c967ad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x57cec4328f0, count: 244
End of stack trace.
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