r0 = fork()
tkill(r0, 0x39)
wait4(0x0, &(0x7f0000000100), 0x0, 0x0)
r1 = syz_open_procfs(r0, &(0x7f0000000000)='net/mcfilter6\x00')
r2 = fork()
r3 = fork()
ptrace(0x10, r3)
ptrace(0x420e, r3)
ptrace$cont(0x20, r3, 0x10000, 0x3)
r4 = accept4$packet(r1, &(0x7f0000000080), &(0x7f00000000c0)=0x14, 0x800)
ioctl$FICLONE(r4, 0x40049409, r1)
ptrace(0x10, r2)
pread64(r1, &(0x7f0000000200)=""/243, 0xf3, 0xfffffffffffffc00)
ptrace(0x420e, r2)
wait4(r2, &(0x7f0000000040), 0x20000000, &(0x7f0000000140))