ioctl$BTRFS_IOC_SUBVOL_GETFLAGS(r2, 0x80089419, 0x0)
r6 = openat(r5, &(0x7f0000000000)='/proc/self/exe\x00', 0x4840, 0x2d)
sendfile(r1, r6, 0x0, 0x100000001)
BUG: leak checking failed