r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
ioctl$BTRFS_IOC_DEV_REPLACE(r0, 0xca289435, &(0x7f0000000080)={0x2, 0x8bc, @start={<r1=>0x0, 0x0, "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", "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"}, [0xfffffffffffffffe, 0x8, 0x1, 0x1000, 0xd38e, 0x4, 0x7f, 0x1, 0x2, 0x7, 0x0, 0x7fff, 0x100, 0x100000001, 0x4, 0x200, 0x2, 0x8, 0x0, 0x3, 0x8, 0x1, 0x1, 0x9, 0x5, 0x35, 0xff1c, 0x7, 0x4, 0x8000, 0x100, 0x30, 0x401, 0x7, 0xfffffffffffffff7, 0x8, 0xffffffff, 0x32, 0x1, 0x80, 0xb6, 0x4, 0x9, 0x38880242, 0x2, 0x100, 0x1, 0x2, 0x4, 0x3, 0x655, 0xc, 0x1, 0xc34c, 0x8, 0xfffffffffffffff9, 0x17, 0x7ff, 0x8, 0xfff, 0xd37, 0xfffffffffffffe01, 0x80000000, 0x200]})
io_setup(0x5, &(0x7f0000000000)=<r2=>0x0)
r3 = signalfd(0xffffffffffffffff, &(0x7f0000000100), 0x8)
r4 = socket$inet6_udp(0xa, 0x2, 0x0)
io_submit(r2, 0x2, &(0x7f0000000180)=[&(0x7f0000001580)={0x0, 0x0, 0x0, 0x0, 0x0, r4, 0x0}, &(0x7f00000016c0)={0x0, 0x0, 0x0, 0x3, 0x0, r3, 0x0, 0x0, 0xff7ffffeffffeffd}])
ioctl$sock_SIOCINQ(r4, 0x541b, &(0x7f0000000f40))
ioctl$BTRFS_IOC_BALANCE_V2(r0, 0xc4009420, &(0x7f0000000ac0)={0x9, 0x0, {0x100000001, @struct={0x10001, 0xbcf}, r1, 0x4, 0x5, 0x5, 0xea0d3b7, 0x61, 0x52, @struct={0xffff165c, 0x5}, 0x76, 0xa1, [0x7e, 0x0, 0x40, 0x40, 0x3e, 0x80000001]}, {0x3, @struct={0x4, 0x4}, 0x0, 0x3, 0x7ff, 0x10000, 0x237, 0x2000000000000, 0x8d, @usage=0x7, 0x8, 0x6, [0x6, 0x7, 0x8000, 0x4, 0xffff, 0x100000000]}, {0x0, @usage, 0x0, 0x4, 0x3a675ab7, 0x8000, 0xffffffff, 0x3, 0x408, @usage=0x18, 0x6, 0xffffffff, [0x8001, 0xfffffffffffffffc, 0x7fffffff, 0x9, 0x9]}, {0xffffffffffffff90, 0x7ff, 0x49c}})
r5 = fork()
tkill(r5, 0x0)